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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2011	Oct. 25, 2011
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Entity Registrant Name	MINE SAFETY APPLIANCES CO
Entity Central Index Key	0000066570
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,639,605

Condensed Consolidated Statement Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statement Of Income [Abstract]
Net sales	$ 298,241	$ 242,019	$ 869,473	$ 691,626
Other income, net	2,398	1,039	4,353	2,359
Total revenues	300,639	243,058	873,826	693,985
Costs and expenses
Cost of products sold	177,353	151,340	519,179	428,268
Selling, general and administrative	78,621	61,185	227,382	184,005
Research and development	9,663	7,938	29,646	23,956
Restructuring and other charges	1,004	2,082	6,118	11,509
Interest	3,198	1,686	10,423	4,911
Currency exchange losses (gains)	431	3,545	986	(90)
Total costs and expenses	270,270	227,776	793,734	652,559
Income before income taxes	30,369	15,282	80,092	41,426
Provision for income taxes	10,188	5,297	26,934	14,387
Net income	20,181	9,985	53,158	27,039
Net income attributable to noncontrolling interests	(209)	(382)	(285)	(703)
Net income attributable to Mine Safety Appliances Company	$ 19,972	$ 9,603	$ 52,873	$ 26,336
Earnings per share attributable to Mine Safety Appliances Company common shareholders
Basic	$ 0.54	$ 0.27	$ 1.44	$ 0.73
Diluted	0.54	0.26	1.42	0.72
Dividends per common share	$ 0.26	$ 0.25	$ 0.77	$ 0.74

Condensed Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 58,822	$ 59,760
Trade receivables, less allowance for doubtful accounts of $7,625 and $9,391	204,675	198,551
Inventories	157,299	150,581
Deferred tax assets	25,918	25,714
Income taxes receivable	3,734	12,936
Prepaid expenses and other current assets	30,664	29,847
Total current assets	481,112	477,389
Property, less accumulated depreciation of $322,520 and $316,288	154,465	156,789
Prepaid pension cost	129,768	121,631
Deferred tax assets	7,436	8,285
Goodwill	262,283	263,089
Other noncurrent assets	188,109	170,005
Total assets	1,223,173	1,197,188
Current liabilities
Notes payable and current portion of long-term debt	8,523	10,163
Accounts payable	53,511	58,460
Employees' compensation	40,228	36,845
Insurance and product liability	20,059	18,401
Taxes on income	4,509	1,253
Other current liabilities	50,544	56,619
Total current liabilities	177,374	181,741
Long-term debt	377,063	367,094
Pensions and other employee benefits	127,821	126,479
Deferred tax liabilities	48,574	49,177
Other noncurrent liabilities	17,320	16,647
Total liabilities	748,152	741,138
Mine Safety Appliances Company shareholders' equity:
Common stock - authorized 180,000,000 shares of no par value; issued 62,081,391 and 62,081,391 shares (outstanding 36,643,634 and 36,519,726 shares)	94,628	88,629
Stock compensation trust - 1,215,769 and 1,360,714 shares	(6,346)	(7,103)
Treasury shares, at cost:
Accumulated other comprehensive loss	(55,023)	(44,316)
Retained earnings	700,858	676,195
Total Mine Safety Appliances Company shareholders' equity	471,454	451,368
Noncontrolling interests	3,567	4,682
Total shareholders' equity	475,021	456,050
Total liabilities and equity	1,223,173	1,197,188
Preferred Stock, 4 1/ 2% Cumulative [Member]
Mine Safety Appliances Company shareholders' equity:
Preferred stock	3,569	3,569
Treasury shares, at cost:
Treasury shares, at cost	(1,753)	(1,753)
Second Cumulative Preferred Voting Stock [Member]
Mine Safety Appliances Company shareholders' equity:
Preferred stock
Common Stock [Member]
Treasury shares, at cost:
Treasury shares, at cost	$ (264,479)	$ (263,853)

Condensed Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Trade receivables, allowance for doubtful accounts	$ 7,625	$ 9,391
Property, accumulated depreciation	$ 322,520	$ 316,288
Percentage of cumulative preferred stock	4.50%	4.50%
Common stock, authorized	180,000,000	180,000,000
Common stock, par value	$ 0	$ 0
Common stock, issued	62,081,391	62,081,391
Common stock, shares outstanding	36,643,634	36,519,726
Stock compensation trust, shares	1,215,769	1,360,714
Preferred Stock, 4 1/ 2% Cumulative [Member]
Preferred stock, par value	$ 50	$ 50
Preferred stock, authorized	100,000	100,000
Preferred stock, callable per share	$ 52.50	$ 52.50
Preferred stock, issued	71,373	71,373
Treasury shares, shares	52,878	52,878
Second Cumulative Preferred Voting Stock [Member]
Preferred stock, par value	$ 10	$ 10
Preferred stock, authorized	1,000,000	1,000,000
Preferred stock, issued	0	0
Common Stock [Member]
Treasury shares, shares	24,221,988	24,200,951

Condensed Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities
Net income	$ 53,158	$ 27,039
Depreciation and amortization	24,886	20,541
Pensions	(3,782)	(3,902)
Net gain from investing activities	(2,299)	(834)
Stock-based compensation	6,256	5,875
Deferred income tax benefit	(1,325)	(2,115)
Other noncurrent assets and liabilities	(24,270)	(26,574)
Currency exchange losses (gains)	986	(90)
Other, net	(7)	(3,890)
Operating cash flow before changes in working capital	53,603	16,050
Trade receivables	(11,139)	(11,783)
Inventories	(13,095)	(17,841)
Accounts payable and accrued liabilities	1,395	6,439
Income taxes receivable, prepaid expenses and other current assets	7,642	8,700
Increase in working capital	(15,197)	(14,485)
Cash flow from operating activities	38,406	1,565
Investing Activities
Property additions	(21,330)	(16,629)
Property disposals	3,145	164
Other investing	333	1,250
Cash flow from investing activities	(17,852)	(15,215)
Financing Activities
Proceeds from short-term debt, net	385	35,108
Proceeds from long-term debt	93,500
Payments on long-term debt	(85,500)	(10,000)
Cash dividends paid	(28,210)	(26,796)
Company stock purchases	(626)	(2,981)
Exercise of stock options	752	3,049
Excess tax provision related to stock plans	(251)	(229)
Cash flow from financing activities	(19,950)	(1,849)
Effect of exchange rate changes on cash	(1,542)	929
Decrease in cash and cash equivalents	(938)	(14,570)
Beginning cash and cash equivalents	59,760	61,983
Ending cash and cash equivalents	$ 58,822	$ 47,413

Basis Of Presentation	9 Months Ended
Basis Of Presentation	Sep. 30, 2011
Basis Of Presentation [Abstract]
Basis Of Presentation	(1) Basis of Presentation We have prepared the condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information and with the rules and regulations for reporting on Form 10-Q. Accordingly, they do not include certain information and disclosures required for comprehensive financial statements. The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. The other information in these financial statements is unaudited; however, we believe that all adjustments, consisting of only normal recurring adjustments, necessary for a fair presentation of these interim periods have been included. The results for interim periods are not necessarily indicative of the results to be expected for the full year. The condensed consolidated financial statements include the accounts of the company and all subsidiaries. Intercompany accounts and transactions have been eliminated. Certain prior year amounts have been reclassified to conform with the current year presentation. Management's Discussion and Analysis of Financial Condition and Results of Operations that is included elsewhere in this report contains additional information about our results of operations and financial position and should be read in conjunction with these notes.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

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+ Details

Restructuring And Other Charges	9 Months Ended
Restructuring And Other Charges	Sep. 30, 2011
Restructuring And Other Charges [Abstract]
Restructuring And Other Charges	(2) Restructuring and Other Charges During the three and nine months ended September 30, 2011, we recorded charges of $1.0 million ($0.7 million after tax) and $6.1 million ($4.0 million after tax), respectively. European segment charges for the nine months ended September 30, 2011 of $3.6 million related primarily to staff reductions in Germany, France and Spain and the transfer of certain production activities to China. North American segment charges for the nine months ended September 30, 2011 of $1.5 million included costs associated with the relocation of certain administrative and production activities. International segment charges for the nine months ended September 30, 2011 of $1.0 million were related to severance costs associated with the relocation of our Wuxi, China operations to Suzhou, China. During the three and nine month periods ended September 30, 2010, we recorded charges of $2.1 million ($1.4 million after tax) and $11.5 million ($7.5 million after tax), respectively. European segment charges of $8.3 million for the nine months ended September 30, 2010 related primarily to a focused voluntary retirement incentive program in Germany and severance costs associated with staff reductions. North American segment charges for the nine months ended September 30, 2010 of $2.4 million included stay bonuses and other costs associated with the transfer of certain production activities to lower cost factories. International segment charges for the nine months ended September 30, 2010 of $0.8 million were primarily related to severance costs associated with staff reductions in South Africa and China.

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Comprehensive (Loss) Income

9 Months Ended

Sep. 30, 2011

Comprehensive (Loss) Income [Abstract]

Comprehensive (Loss) Income

(3) Comprehensive (Loss) Income

Components of comprehensive (loss) income are as follows:


	Three Months Ended September 30						Nine Months Ended September 30
(In thousands)	2011			2010			2011			2010
Net income	$	20,181		$	9,985		$	53,158		$	27,039
Foreign currency translation (loss) gain		(24,303	)		20,985			(10,707	)		768

Comprehensive (loss) income		(4,122	)		30,970			42,451			27,807
Comprehensive loss (income) attributable to noncontrolling interests		1,064			(1,131	)		1,115			(1,260	)

Comprehensive (loss) income attributable to Mine Safety Appliances Company		(3,058	)		29,839			43,566			26,547

Components of accumulated other comprehensive loss are as follows:


(In thousands)	September 30 2011			December 31 2010
Cumulative translation adjustments	$	4,772		$	15,479
Pension and post-retirement plan adjustments		(59,795	)		(59,795	)

Accumulated other comprehensive loss		(55,023	)		(44,316	)

- Definition

The entire disclosure for comprehensive income. Includes, but is not limited to, the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Earnings Per Share

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share

(4) Earnings per Share

Basic earnings per share is computed by dividing net income, after the deduction of preferred stock dividends and undistributed earnings allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share assumes the issuance of common stock for all potentially dilutive share equivalents outstanding not classified as participating securities. Participating securities are defined as unvested stock-based payment awards that contain nonforfeitable rights to dividends.


	Three Months Ended September 30						Nine Months Ended September 30
(In thousands, except per share amounts)	2011			2010			2011			2010
Net income attributable to Mine Safety Appliances Company	$	19,972		$	9,603		$	52,873		$	26,336
Preferred stock dividends		(10	)		(10	)		(30	)		(30	)

Income available to common equity		19,962			9,593			52,843			26,306
Dividends and undistributed earnings allocated to participating securities		(217	)		(96	)		(572	)		(258	)

Income available to common shareholders		19,745			9,497			52,271			26,048

Basic earnings per common share	$	0.54		$	0.27		$	1.44		$	0.73

Diluted earnings per common share	$	0.54		$	0.26		$	1.42		$	0.72

Basic shares outstanding		36,236			35,917			36,206			35,819
Stock options and other stock compensation		563			474			611			547

Diluted shares outstanding		36,799			36,391			36,817			36,366

Antidilutive stock options		896			1,263			896			1,263

Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Segment Information

(5) Segment Information

We are organized into five geographic operating segments based on management responsibilities. The operating segments have been aggregated (based on economic similarities, the nature of their products, end-user markets and methods of distribution) into three reportable segments: North America, Europe, and International. Reportable segment information is presented in the following table:


(In thousands)	North America		Europe			International		Reconciling Items			Consolidated Totals
Three Months Ended September 30, 2011
Sales to external customers	$	143,547	$	71,696		$	82,998	$	—		$	298,241
Intercompany sales		26,077		27,515			5,703		(59,295	)		—
Net income attributable to Mine Safety Appliances Company		18,839		1,859			6,666		(7,392	)		19,972
Nine Months Ended September 30, 2011
Sales to external customers	$	412,154	$	211,403		$	245,916	$	—		$	869,473
Intercompany sales		76,537		86,213			13,720		(176,470	)		—
Net income attributable to Mine Safety Appliances Company		44,773		5,540			20,509		(17,949	)		52,873
Three Months Ended September 30, 2010
Sales to external customers	$	111,915	$	61,539		$	68,565	$	—		$	242,019
Intercompany sales		22,987		21,242			4,450		(48,679	)		—
Net income attributable to Mine Safety Appliances Company		12,621		280			3,800		(7,098	)		9,603
Nine Months Ended September 30, 2010
Sales to external customers	$	327,803	$	174,569		$	189,254	$	—		$	691,626
Intercompany sales		61,659		64,908			11,920		(138,487	)		—
Net income (loss) attributable to Mine Safety Appliances Company		31,133		(5,483	)		11,727		(11,041	)		26,336

Reconciling items consist primarily of intercompany eliminations and items reported at the corporate level.

In 2011, we changed our segment reporting to include corporate overhead and interest expense in reconciling items. Previously, these expenses were reported in the North American, European, and International segments. Comparative 2010 amounts have been revised to conform with the current year presentation. The effect of the revisions for the three months ended September 30, 2010 improved North American, European, and International segment results by $2.2 million, $0.6 million, and $0.5 million, respectively, and reduced the results reported in Reconciling Items by corresponding amounts. The effect of the revisions for the nine months September 30, 2010 improved North American, European, and International segment results by $6.4 million, $1.8 million, and $1.5 million, respectively, and reduced the results reported in Reconciling Items by corresponding amounts.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

Pensions And Other Postretirement Benefits

9 Months Ended

Sep. 30, 2011

Pensions And Other Postretirement Benefits [Abstract]

Pensions And Other Postretirement Benefits

(6) Pensions and Other Postretirement Benefits

Components of net periodic benefit (credit) cost consisted of the following:


	Pension Benefits						Other Benefits
(In thousands)	2011			2010			2011			2010
Three months ended September 30
Service cost	$	2,162		$	1,938		$	218		$	191
Interest cost		4,876			4,682			436			432
Expected return on plan assets		(8,507	)		(8,643	)		—			—
Amortization of transition amounts		1			1			—			—
Amortization of prior service cost		26			25			(114	)		(138	)
Recognized net actuarial losses		108			160			213			210

Net periodic benefit (credit) cost		(1,334	)		(1,837	)		753			695

Nine months ended September 30
Service cost	$	6,491		$	5,811		$	654		$	572
Interest cost		14,627			14,048			1,306			1,297
Expected return on plan assets		(25,575	)		(25,931	)		—			—
Amortization of transition amounts		3			3			—			—
Amortization of prior service cost		78			77			(341	)		(416	)
Recognized net actuarial losses		594			433			639			630
Settlement loss		—			285			—			—
Termination benefits		—			1,372			—			—

Net periodic benefit (credit) cost		(3,782	)		(3,902	)		2,258			2,083

We made contributions of $3.5 million to our pension plans during the nine month period ended September 30, 2011. We expect to make total contributions of approximately $4.6 million to our pension plans in 2011.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Number 132R
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
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-Number 03-2
-Paragraph 8
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-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Number FAS88
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Goodwill And Intangible Assets

9 Months Ended

Sep. 30, 2011

Goodwill And Intangible Assets [Abstract]

Goodwill And Intangible Assets

(7) Goodwill and Intangible Assets

Changes in goodwill during the nine months ended September 30, 2011 were as follows:


(In thousands)	Goodwill
Net balance at January 1, 2011	$	263,089
Currency translation and other		(806	)

Net balance at September 30, 2011		262,283

At September 30, 2011, goodwill of $199.9 million, $58.9 million, and $3.5 million related to the North American, European, and International reporting units, respectively.

Changes in intangible assets, net of accumulated amortization (which are reported in other noncurrent assets) during the nine months ended September 30, 2011 were as follows:


(In thousands)	Intangibles
Net balance at January 1, 2011	$	53,880
Amortization expense		(4,419	)
Currency translation		(361	)

Net balance at September 30, 2011		49,100

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Inventories

9 Months Ended

Sep. 30, 2011

Inventories [Abstract]

Inventories

8) Inventories


(In thousands)	September 30 2011		December 31 2010
Finished products	$	73,261	$	71,743
Work in process		19,780		16,494
Raw materials and supplies		64,258		62,344

Total inventories		157,299		150,581

Stock Plans

9 Months Ended

Sep. 30, 2011

Stock Plans [Abstract]

Stock Plans

(9) Stock Plans

The 2008 Management Equity Incentive Plan provides for various forms of stock-based compensation for eligible employees through May 2018. Management stock-based compensation includes stock options, restricted stock, and performance stock units. The 2008 Non-Employee Directors' Equity Incentive Plan provides for grants of stock options and restricted stock to non-employee directors through May 2018. Stock options are granted at market value option prices and expire after ten years. Stock options are exercisable beginning three years after the grant date. Restricted stock is granted without payment to the company and generally vests three years after the grant date. Certain restricted stock for management retention vests in three equal tranches four, five, and six years after the grant date. Unvested restricted stock for management retention is forfeited if the grantee's employment with the company terminates for any reason other than death or disability. Restricted stock and performance stock units are valued at the market value of the stock on the grant date. The final number of shares to be issued for performance stock units may range from zero to 200% of the target award based on achieving a targeted return on net assets (RONA) over a three year performance period relative to a pre-determined peer group of companies. We issue Stock Compensation Trust shares or new shares for stock option exercises, restricted stock grants, and performance stock unit grants.

Stock compensation expense was as follows:


	Three Months Ended September 30				Nine Months Ended September 30
(In thousands)	2011		2010		2011		2010
Stock compensation expense	$	1,613	$	1,471	$	6,256	$	5,875
Income tax benefit		595		539		2,129		2,118

Stock compensation expense, net of income tax benefit		1,018		932		4,127		3,757

A summary of stock option activity for the nine months ended September 30, 2011 follows:


	Shares			Weighted Average Exercise Price
Outstanding at January 1, 2011		1,749,003		$	29.74
Granted		166,247			34.09
Exercised		(41,130	)		18.28

Outstanding at September 30, 2011		1,874,120			30.38

Exercisable at September 30, 2011		963,078			36.86

A summary of restricted stock activity for the nine months ended September 30, 2011 follows:


	Shares			Weighted Average Grant Date Fair Value
Unvested at January 1, 2011		473,637		$	26.56
Granted		124,991			33.61
Vested		(76,105	)		44.43
Forfeited		(9,986	)		32.21

Unvested at September 30, 2011		512,537			25.51

A summary of performance stock unit activity for the nine months ended September 30, 2011 follows:


	Shares		Weighted Average Grant Date Fair Value
Unvested at January 1, 2011		85,629	$	20.53
Granted		41,320		33.55

Unvested at September 30, 2011		126,949		24.77

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ References + Details

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2011

Derivative Financial Instruments [Abstract]

Derivative Financial Instruments

(10) Derivative Financial Instruments

As part of our currency exchange rate risk management strategy, we enter into certain derivative foreign currency forward contracts that do not meet the GAAP criteria for hedge accounting, but which have the impact of partially offsetting certain foreign currency exposures. We account for these forward contracts on a full mark-to-market basis and report the related gains or losses in currency exchange gains or losses. At September 30, 2011, the notional amount of open forward contracts was not significant. The unrealized gain on these contracts was immaterial.

The following table presents the balance sheet location and fair value of assets associated with derivative financial instruments:


(In thousands)	September 30, 2011		December 31, 2010
Derivatives not designated as hedging instruments:
Foreign exchange contracts:
Prepaid expenses and other current assets	$	2	$	4

The following table presents the income statement location and impact of derivative financial instruments:


		(Gain) Loss Recognized in Income
		Nine Months Ended September 30
(In thousands)	Income Statement Location	2011			2010
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Currency exchange losses (gains)	$	(264	)	$	857

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

(11) Income Taxes

At September 30, 2011, we had a gross liability for unrecognized tax benefits of $11.8 million. We have recognized tax benefits associated with these liabilities of $10.5 million at September 30, 2011. These balances are unchanged since December 31, 2010. We do not expect that the total amount of the unrecognized tax benefits will significantly increase or decrease within twelve months of the reporting date.

We recognize interest related to unrecognized tax benefits in interest expense and penalties in operating expenses. Our liability for accrued interest and penalties related to uncertain tax positions was $1.0 million at September 30, 2011.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
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+ Details

Fair Value Measurements

9 Months Ended

Sep. 30, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

(12) Fair Value Measurements

GAAP defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. GAAP establishes a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity's own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are:

•

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities.

•

Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates); and inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•

Level 3 - Inputs that are both significant to the fair value measurement and unobservable.

The valuation methodologies we used to measure financial assets and liabilities were limited to the derivative financial instruments described in Note 10. We estimate the fair value of these financial instruments, consisting of foreign currency forward contracts, based upon valuation models with inputs that generally can be verified by observable market conditions and do not involve significant management judgment. Accordingly, the fair values of these financial instruments are classified within Level 2 of the fair value hierarchy.

- Definition

Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Fair Value Of Financial Instruments	9 Months Ended
Fair Value Of Financial Instruments	Sep. 30, 2011
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	(13) Fair Value of Financial Instruments With the exception of fixed rate long-term debt, we believe that the reported carrying amounts of our financial assets and liabilities approximate their fair values. At September 30, 2011, the reported carrying amount of our fixed rate long-term debt (including the current portion) was $168.0 million and the fair value was $175.9 million. The fair value of our long-term debt was determined using cash flow valuation models to estimate the market value of similar transactions as of September 30, 2011.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
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+ Details

Acquisitions

9 Months Ended

Sep. 30, 2011

Acquisitions [Abstract]

Acquisitions

(14) Acquisitions

On October 13, 2010, we acquired General Monitors, Inc. (GMI) and its affiliated companies, General Monitors Ireland Limited (GMIL) and General Monitors Transnational, LLC (GMT), collectively referred to as General Monitors, for $278.2 million. There is no contingent consideration. At the same time, we entered into an escrow agreement with the sellers, pursuant to which approximately $38.0 million of the purchase price was placed into escrow to be used, if necessary, to satisfy certain indemnification obligations of the sellers. The escrow agreement expires two years after the closing date.

Approximately $264.0 million of the acquisition price was funded through the issuance of $100.0 million in 4.00% Series A Senior Notes and borrowings on a $250.0 million unsecured senior revolving credit facility. The Series A Senior Notes will mature on October 13, 2021 and are payable in five annual installments of $20.0 million, commencing October 13, 2017. Interest is payable quarterly. The Series A Senior Notes are unsecured. Borrowings made under the unsecured senior revolving credit facility bear interest at a variable annual rate and may be used for general corporate purposes, including working capital, permitted acquisitions, capital expenditures, and repayment of existing debt.

As of the acquisition date, GMI, GMIL and GMT are our wholly-owned subsidiaries. General Monitors is a leading innovator and developer of advanced flame and gas detection systems that are used in a broad range of oil and gas exploration and refining applications and in diverse industrial plant settings. In addition to providing us with greater access to the global oil and gas market, we believe that the acquisition significantly enhances our long-term corporate strategy in fixed gas detection by providing us with world-class research and development talent and an industry-leading product line.

The following table summarizes the fair values of the General Monitors assets acquired and liabilities assumed at the date of acquisition:


(In millions)	October 13 2010
Current assets (including cash of $18.6 million)	$	46.8
Property		14.0
Trade name		6.0
Acquired technology		11.0
Customer-related intangibles		27.0
Goodwill		179.9
Other noncurrent assets		3.5

Total assets acquired		288.2
Total liabilities assumed		10.0

Net assets acquired		278.2

Assets acquired and liabilities assumed in connection with the acquisition have been recorded at their fair values. Fair values were determined by management based, in part, on an independent valuation performed by a third party valuation specialist. Identifiable intangible assets with finite lives are subject to amortization over their estimated useful lives. The identifiable intangible assets acquired in the General Monitors transaction are being amortized over an estimated weighted-average amortization period of 16 years. Estimated future amortization expense related to these identifiable intangible assets is approximately $3.3 million in each of the next five years.

Goodwill is calculated as the excess of the purchase price over the fair value of net assets acquired and represents the future economic benefits arising from acquired assets that could not be individually identified and separately recognized. Among the factors that contributed to a purchase price in excess of the fair value of the net tangible and intangible assets acquired were the acquisition of an assembled workforce, the expected synergies and other benefits that we believe will result from combining the operations of General Monitors with our operations, and the going concern element of General Monitors' existing business. Goodwill related to the General Monitors acquisition was recorded in our reportable segments as follows: $136.7 million in the North American segment and $43.2 million in the European segment. North American segment goodwill is expected to be tax deductible. The step up to fair value of acquired inventory as part of the purchase price allocation totaled $4.8 million.

The operating results of General Monitors have been included in our consolidated financial statements since the acquisition date. Our results for the three months ended September 30, 2011 include General Monitors sales and net income of $22.2 million and $4.8 million, respectively. Our results for the nine months ended September 30, 2011 include General Monitors sales and net income of $63.5 million and $11.2 million, respectively. General Monitors net income for the nine months ended September 30, 2011 includes a one-time increase in cost of sales of $2.3 million ($1.5 million after tax) related to the fair value step-up of inventories acquired from General Monitors.

The following unaudited pro forma information presents our combined results as if the acquisition had occurred at the beginning of 2010. The unaudited pro forma financial information was prepared to give effect to events that are directly attributable to the acquisition, factually supportable, and expected to have a continuing impact on the combined company's results. There were no transactions between us and GMI, GMIL, or GMT during the nine months ended September 30, 2010 that are required to be eliminated. Transactions between GMI, GMIL, and GMT during the nine months ended September 30, 2011 have been eliminated in the unaudited pro forma condensed combined financial information. Pro forma adjustments have been made to the 2010 information to reflect the incremental impact on earnings of interest expense on the borrowings that we made to acquire the General Monitors companies, amortization expense related to acquired intangible assets, and income tax expense, net of benefits, associated with the previously-discussed adjustments. Pro forma adjustments were made to the 2011 information to eliminate incremental one-time costs and related tax benefits associated with purchase accounting adjustments. The unaudited pro forma financial information does not reflect any cost savings, operating synergies or revenue enhancements that the combined company may achieve as a result of the acquisitions or the costs to integrate the operations or the costs necessary to achieve cost savings, operating synergies or revenue enhancements.

Pro forma financial information (Unaudited)


	Three Months Ended September 30				Nine Months Ended September 30
(In millions, except per share amounts)	2011		2010		2011		2010
Net sales	$	298.3	$	259.3	$	869.5	$	747.2
Net income		20.0		14.7		54.5		35.9
Basic earnings per share		0.54		0.40		1.47		0.99
Diluted earnings per share		0.54		0.40		1.46		0.98

The unaudited pro forma condensed combined financial information is presented for information purposes only and is not intended to represent or be indicative of the combined results of operations or financial position that we would have reported had the acquisitions been completed as of the date and for the periods presented, and should not be taken as representative of our consolidated results of operations or financial condition following the acquisitions. In addition, the unaudited pro forma condensed combined financial information is not intended to project the future financial position or results of operations of the combined company.

The unaudited pro forma financial information was prepared using the acquisition method of accounting under existing GAAP.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
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+ Details

Assets Held For Sale

9 Months Ended

Sep. 30, 2011

Assets Held For Sale [Abstract]

Assets Held For Sale

(15) Assets Held for Sale

On October 14, 2011, we sold certain assets related to our Paraclete ballistic vest business located in St. Pauls, North Carolina. Assets related to this transaction are reported in the following balance sheet lines at September 30, 2011:


(In thousands)	September 30 2011
Inventory	$	3,180
Property, net of depreciation		663
Goodwill		1,250
Other noncurrent assets		531

Total assets		5,624

The impact of this transaction and the operating results of the Paraclete ballistic vest business are not material to net income or earnings per share for all periods presented and are not expected to be material to future periods.

On October 10, 2011, we sold our former headquarters building located in O'Hara Township, Pennsylvania. Assets of $8.4 million, net of depreciation, related to this transaction are reported in property in the September 30, 2011 balance sheet. This transaction is expected to result in a pre-tax gain of approximately $1.0 million that will be reported in other income during the fourth quarter of 2011.

Contingencies

9 Months Ended

Sep. 30, 2011

Contingencies [Abstract]

Contingencies

(16) Contingencies

We categorize the product liability losses that we experience into two main categories, single incident and cumulative trauma. Single incident product liability claims are discrete incidents that are typically known to us when they occur and involve observable injuries and, therefore, more quantifiable damages. Therefore, we maintain a reserve for single incident product liability claims based on expected settlement costs for pending claims and an estimate of costs for unreported claims derived from experience, sales volumes, and other relevant information. The reserve for single incident product liability claims was $4.7 million and $5.2 million at September 30, 2011 and December 31, 2010, respectively. Single incident product liability expense was not significant during the nine months ended September 30, 2011 and 2010. We evaluate our single incident product liability exposures on an ongoing basis and make adjustments to the reserve as new information becomes available.

Cumulative trauma product liability claims involve exposures to harmful substances (e.g., silica, asbestos, and coal dust) that occurred many years ago and may have developed over long periods of time into diseases such as silicosis, asbestosis, or coal worker's pneumoconiosis. We are presently named as a defendant in 2,000 suits in which plaintiffs allege to have contracted certain cumulative trauma diseases related to exposure to silica, asbestos, and/or coal dust. These lawsuits mainly involve respiratory protection products allegedly manufactured and sold by us. We are unable to estimate total damages sought in these lawsuits as they generally do not specify the injuries alleged, the amount of damages sought, and potentially involve multiple defendants.

Cumulative trauma product liability litigation is difficult to predict. In our experience, until late in a lawsuit, we cannot reasonably determine whether it is probable that any given cumulative trauma lawsuit will ultimately result in a liability. This uncertainty is caused by many factors, including the following: cumulative trauma complaints generally do not provide information sufficient to determine if a loss is probable; cumulative trauma litigation is inherently unpredictable and information is often insufficient to determine if a lawsuit will develop into an actively litigated case; and even when a case is actively litigated, it is often difficult to determine if the lawsuit will be dismissed or otherwise resolved until late in the lawsuit. Moreover, even once it is probable that such a lawsuit will result in a loss, it is difficult to reasonably estimate the amount of actual loss that will be incurred. These amounts are highly variable and turn on a case-by-case analysis of the relevant facts, which are often not learned until late in the lawsuit.

Because of these factors, we cannot reliably determine our potential liability for such claims until late in the lawsuit. We, therefore, do not record cumulative trauma product liability losses when a lawsuit is filed, but rather, when we learn sufficient information to determine that it is probable that we will incur a loss and the amount of loss can be reasonably estimated. We record expenses for defense costs associated with open cumulative trauma product liability lawsuits as incurred.

We cannot estimate any amount or range of possible losses related to resolving pending and future cumulative trauma product liability claims that we may face because of the factors described above. As new information about cumulative trauma product liability cases and future developments becomes available, we reassess our potential exposures.

A summary of cumulative trauma product liability claims activity follows:


	Nine Months Ended September 30 2011			Year Ended December 31 2010
Open claims, beginning of period		1,900			2,480
New claims		208			260
Settled and dismissed claims		(108	)		(840	)

Open claims, end of period		2,000			1,900

With some common contract exclusions, we maintain insurance for cumulative trauma product liability claims. We have purchased insurance policies from over 20 different insurance carriers that provide coverage for cumulative trauma product liability losses and related defense costs. In the normal course of business, we make payments to settle product liability claims and for related defense costs. We record receivables for the amounts that are covered by insurance. The available limits of these policies are many times our recorded insurance receivable balance.

Various factors could affect the timing and amount of recovery of our insurance receivables, including the outcome of negotiations with insurers, legal proceedings with respect to product liability insurance coverage, and the extent to which insurers may become insolvent in the future.

Our insurance receivables totaled $117.0 million at September 30, 2011, of which $2.0 million is reported in other current assets and $115.0 million is reported in other non-current assets. Our insurance receivables totaled $89.0 million December 31, 2010, all of which is reported in other non-current assets.

A summary of insurance receivable balances and activity related to cumulative trauma product liability losses follows:


	Nine Months Ended September 30 2011			Year Ended December 31 2010
(In millions)	Nine Months Ended September 30 2011			Year Ended December 31 2010
Balance beginning of period	$	89.0		$	91.7
Additions		29.8			30.9
Collections and settlements		(1.8	)		(33.6	)

Balance end of period		117.0			89.0

Additions to insurance receivables in the above table represent insured cumulative trauma product liability settlements and related defense costs. There were no uninsured cumulative trauma product liability losses during the nine month periods ended September 30, 2011 and 2010. Uninsured defense costs during the nine month periods ended September 30, 2011 and 2010 were $0.6 million and $0.5 million, respectively.

Our aggregate cumulative trauma product liability settlement, administrative and defense costs for the years ended December 31, 2010, 2009, and 2008 totaled approximately $90.3 million, substantially all of which was insured.

We believe that the increase in the insurance receivable balance that we have experienced since 2005 is primarily due to disagreements among our insurance carriers, and consequently with us, as to when their individual obligations to pay us are triggered and the amount of each insurer's obligation, as compared to other insurers. We believe that our insurers do not contest that they have issued policies to us or that these policies cover cumulative trauma product liability claims. Our ability to successfully resolve our insurance litigations with Century Indemnity Company and Columbia Casualty Company during 2010 demonstrates that we had strong legal positions concerning our rights to coverage.

We regularly evaluate the collectability of insurance receivables and record the amounts that we conclude are probable of collection. Our conclusion is based on our analysis of the terms of the underlying insurance policies, our experience in successfully recovering cumulative trauma product liability claims from our insurers under other policies, the financial ability of our insurance carriers to pay the claims, our understanding and interpretation of the relevant facts and applicable law, and the advice of legal counsel, who believe that our insurers are required to provide coverage based on the terms of the policies.

Although the outcome of cumulative trauma product liability matters cannot be predicted with certainty and unfavorable resolutions could materially affect our results of operations on a quarter-to-quarter basis, based on information currently available and the amounts of insurance coverage available to us, we believe that the disposition of cumulative trauma product liability lawsuits that are pending against us will not have a materially adverse effect on our future results of operations, financial condition, or liquidity.

We are currently involved in coverage litigation with The North River Insurance Company (North River). We have sued North River in the United States District Court for the Western District of Pennsylvania, alleging that North River breached one insurance policy by failing to pay amounts owing to us and that its refusal to pay constitutes bad faith. The case was assigned to the Court's mandatory Alternative Dispute Resolution program, in an attempt to resolve the dispute. The mediation was unsuccessful and the case will proceed to trial. We believe that North River's refusal to indemnify us under the policy for settlements and legal fees paid by us is wholly contrary to Pennsylvania law and we are pursuing the legal actions necessary to collect all amounts.

In April 2010, North River filed a complaint against us and two excess insurance carriers in the Court of Common Pleas of Allegheny County, Pennsylvania seeking a declaratory judgment concerning their responsibilities under three additional policies shared with Northbrook Insurance Company. We filed a motion to dismiss the declaratory judgment claim and a counter claim for breach of contract against North River and the two excess carriers. The court stayed the declaratory judgment claim and the breach of contract claim is now in discovery. We believe that Pennsylvania law supports our position that North River has insurance responsibilities to indemnify us against various product liability claims to the full limits of these policies.

During May 2010, we resolved coverage litigation with Century Indemnity Company through a negotiated settlement. As part of this settlement, both parties dismissed all claims against one another under the previously-filed coverage litigation. The settlement did not have an impact on our operating results.

During July 2010, we resolved coverage litigation with Columbia Casualty Company through a negotiated settlement. As part of this settlement, both parties dismissed all claims against one another under the previously-filed coverage litigation. The settlement did not have an impact on our operating results.

In July 2010, we filed a complaint in the Superior Court of the State of Delaware seeking declaratory and other relief from the majority of our excess insurance carriers concerning the future rights and obligations of MSA and our excess insurance carriers under various insurance policies. The reason for this insurance coverage action is to secure a comprehensive resolution of our rights under the insurance policies issued by our insurers.

In December 2010, North River filed a motion to dismiss or stay the Delaware action asserting that the previously-discussed cases in the United States District Court for the Western District of Pennsylvania and the Court of Common Pleas of Allegheny County, Pennsylvania were capable of resolving the claims presented in the Superior Court of the State of Delaware action. In January 2011, the Superior Court of the State of Delaware granted North River's motion to stay the Delaware insurance coverage action, pending resolution of the ongoing actions in the United States District Court for the Western District of Pennsylvania and the Court of Common Please of Allegheny County, Pennsylvania. We appealed the trial court's decision to stay this case and our appeal was denied. There will be no further activity in the Delaware action until the two Pennsylvania actions are resolved.

- Definition

Tabular disclosure of exposure to material amount of loss arising from allegations of damages pertaining to and arising from one or more of the entity's products.

+ References + Details

Recently Adopted And Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2011

Recently Adopted And Recently Issued Accounting Standards

Recently Adopted And Recently Issued Accounting Standards

(17) Recently Adopted and Recently Issued Accounting Standards

In October 2009, the FASB issued ASU No. 2009-14, Certain Revenue Arrangements That Include Software Elements. This ASU changes the accounting model for revenue arrangements that include both tangible products and software elements that are "essential to the functionality," and scopes these products out of current software revenue guidance. The new guidance includes factors to help companies determine what software elements are considered "essential to the functionality." The amendments will subject software-enabled products to other revenue guidance and disclosure requirements, such as guidance surrounding revenue arrangements with multiple-deliverables. The adoption of this ASU on January 1, 2011 did not have a material effect on our consolidated financial statements.

In April 2010, the FASB issued ASU No. 2010-17, Revenue Recognition—Milestone Method. This ASU allows entities to make a policy election to use the milestone method of revenue recognition and provides guidance on defining a milestone and the criteria that should be met for applying the milestone method. The scope of this ASU is limited to the transactions involving milestones relating to research and development deliverables. The guidance includes enhanced disclosure requirements about each arrangement, individual milestones and related contingent consideration, substantive milestones and factors considered in that determination. The adoption of this ASU on January 1, 2011 did not have a material effect on our consolidated financial statements.

In May 2011, the FASB issued ASU 2011-04,Fair Value Measurement—Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. This ASU updated measurement guidance to improve the comparability of fair value measurements between U.S.GAAP and International Financial Reporting Standards and enhanced disclosure requirements. The most significant change in disclosures is an expansion of information related to fair value measurements categorized within Level 3 of the fair value hierarchy. The ASU will be effective beginning in 2012. The adoption of this ASU will not have a material effect on our consolidated financial statements.

In June 2011, the FASB issued ASU 2011-05, Comprehensive Income—Presentation of Comprehensive Income. This ASU requires net income and comprehensive income to be presented in either a single continuous statement or in two separate, but consecutive, statements. The ASU eliminates the option of presenting other comprehensive income in the statement of shareholders' equity. The ASU will be effective beginning in 2012. The adoption of this ASU will not have a material effect on our results of operations or financial position, but will change the format of the presentation of comprehensive income.

- Definition

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 154
-Paragraph 2, 17, 18
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 28
-Paragraph 23, 24
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 01
-Paragraph b
-Subparagraph 6
-Article 10

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22499-107794

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22580-107794

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accounting Change
-URI http://asc.fasb.org/extlink&oid=6503790

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.10-01.(b)(6))
-URI http://asc.fasb.org/extlink&oid=6958853&loc=d3e46468-122699

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
-URI http://asc.fasb.org/extlink&oid=6523989

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305

+ Details

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2011
Subsequent Events
Subsequent Events	(18) Subsequent Events In October 2011, we established a joint venture company with MCR Safety of Memphis, Tennessee. The new entity, Safety Works, LLC, is a full-line glove, garment and safety products company in the North American retail market. As the owner of approximately 73% of the equity, we will include Safety Works in our consolidated financial statements beginning in October 2011. The formation of the joint venture is not expected to have a material effect on our consolidated financial statements. In October 2011, we sold certain assets related to our Paraclete ballistic vest business located in St. Pauls, North Carolina. The impact of this transaction and the operating results of the Paraclete ballistic vest business are not material to net income or earnings per share for all periods presented and are not expected to be significant to future results. In October 2011, we resolved coverage litigation with Allianz Global Risks US Insurance Company and Allianz Underwriters Insurance Company through a negotiated settlement. As part of this settlement, both parties dismissed all claims against one another under previously-filed coverage litigation. The settlement is not expected to materially impact our operating results. In October 2011, we sold our former headquarters building in O'Hara Township, Pennsylvania. This transaction is expected to result in a pre-tax gain of approximately $1.0 million.

Comprehensive (Loss) Income (Tables)

9 Months Ended

Sep. 30, 2011

Comprehensive (Loss) Income [Abstract]

Components Of Comprehensive (Loss) Income


	Three Months Ended September 30						Nine Months Ended September 30
(In thousands)	2011			2010			2011			2010
Net income	$	20,181		$	9,985		$	53,158		$	27,039
Foreign currency translation (loss) gain		(24,303	)		20,985			(10,707	)		768

Comprehensive (loss) income		(4,122	)		30,970			42,451			27,807
Comprehensive loss (income) attributable to noncontrolling interests		1,064			(1,131	)		1,115			(1,260	)

Comprehensive (loss) income attributable to Mine Safety Appliances Company		(3,058	)		29,839			43,566			26,547

Components Of Accumulated Other Comprehensive Loss


(In thousands)	September 30 2011			December 31 2010
Cumulative translation adjustments	$	4,772		$	15,479
Pension and post-retirement plan adjustments		(59,795	)		(59,795	)

Accumulated other comprehensive loss		(55,023	)		(44,316	)

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share


	Three Months Ended September 30						Nine Months Ended September 30
(In thousands, except per share amounts)	2011			2010			2011			2010
Net income attributable to Mine Safety Appliances Company	$	19,972		$	9,603		$	52,873		$	26,336
Preferred stock dividends		(10	)		(10	)		(30	)		(30	)

Income available to common equity		19,962			9,593			52,843			26,306
Dividends and undistributed earnings allocated to participating securities		(217	)		(96	)		(572	)		(258	)

Income available to common shareholders		19,745			9,497			52,271			26,048

Basic earnings per common share	$	0.54		$	0.27		$	1.44		$	0.73

Diluted earnings per common share	$	0.54		$	0.26		$	1.42		$	0.72

Basic shares outstanding		36,236			35,917			36,206			35,819
Stock options and other stock compensation		563			474			611			547

Diluted shares outstanding		36,799			36,391			36,817			36,366

Antidilutive stock options		896			1,263			896			1,263

Segment Information (Tables)

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Reportable Segment Information


(In thousands)	North America		Europe			International		Reconciling Items			Consolidated Totals
Three Months Ended September 30, 2011
Sales to external customers	$	143,547	$	71,696		$	82,998	$	—		$	298,241
Intercompany sales		26,077		27,515			5,703		(59,295	)		—
Net income attributable to Mine Safety Appliances Company		18,839		1,859			6,666		(7,392	)		19,972
Nine Months Ended September 30, 2011
Sales to external customers	$	412,154	$	211,403		$	245,916	$	—		$	869,473
Intercompany sales		76,537		86,213			13,720		(176,470	)		—
Net income attributable to Mine Safety Appliances Company		44,773		5,540			20,509		(17,949	)		52,873
Three Months Ended September 30, 2010
Sales to external customers	$	111,915	$	61,539		$	68,565	$	—		$	242,019
Intercompany sales		22,987		21,242			4,450		(48,679	)		—
Net income attributable to Mine Safety Appliances Company		12,621		280			3,800		(7,098	)		9,603
Nine Months Ended September 30, 2010
Sales to external customers	$	327,803	$	174,569		$	189,254	$	—		$	691,626
Intercompany sales		61,659		64,908			11,920		(138,487	)		—
Net income (loss) attributable to Mine Safety Appliances Company		31,133		(5,483	)		11,727		(11,041	)		26,336

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Pensions And Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Pensions And Other Postretirement Benefits [Abstract]

Components Of Net Periodic Benefit (Credit) Cost


	Pension Benefits						Other Benefits
(In thousands)	2011			2010			2011			2010
Three months ended September 30
Service cost	$	2,162		$	1,938		$	218		$	191
Interest cost		4,876			4,682			436			432
Expected return on plan assets		(8,507	)		(8,643	)		—			—
Amortization of transition amounts		1			1			—			—
Amortization of prior service cost		26			25			(114	)		(138	)
Recognized net actuarial losses		108			160			213			210

Net periodic benefit (credit) cost		(1,334	)		(1,837	)		753			695

Nine months ended September 30
Service cost	$	6,491		$	5,811		$	654		$	572
Interest cost		14,627			14,048			1,306			1,297
Expected return on plan assets		(25,575	)		(25,931	)		—			—
Amortization of transition amounts		3			3			—			—
Amortization of prior service cost		78			77			(341	)		(416	)
Recognized net actuarial losses		594			433			639			630
Settlement loss		—			285			—			—
Termination benefits		—			1,372			—			—

Net periodic benefit (credit) cost		(3,782	)		(3,902	)		2,258			2,083

Goodwill And Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill And Intangible Assets [Abstract]

Changes In Goodwill


(In thousands)	Goodwill
Net balance at January 1, 2011	$	263,089
Currency translation and other		(806	)

Net balance at September 30, 2011		262,283

Changes In Intangible Assets, Net Of Accumulated Amortization


(In thousands)	Intangibles
Net balance at January 1, 2011	$	53,880
Amortization expense		(4,419	)
Currency translation		(361	)

Net balance at September 30, 2011		49,100

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Inventories (Tables)

9 Months Ended

Sep. 30, 2011

Inventories [Abstract]

Inventories


(In thousands)	September 30 2011		December 31 2010
Finished products	$	73,261	$	71,743
Work in process		19,780		16,494
Raw materials and supplies		64,258		62,344

Total inventories		157,299		150,581

Stock Plans (Tables)

9 Months Ended

Sep. 30, 2011

Stock Plans [Abstract]

Stock Compensation Expense


	Three Months Ended September 30				Nine Months Ended September 30
(In thousands)	2011		2010		2011		2010
Stock compensation expense	$	1,613	$	1,471	$	6,256	$	5,875
Income tax benefit		595		539		2,129		2,118

Stock compensation expense, net of income tax benefit		1,018		932		4,127		3,757

Summary Of Stock Option Activity


	Shares			Weighted Average Exercise Price
Outstanding at January 1, 2011		1,749,003		$	29.74
Granted		166,247			34.09
Exercised		(41,130	)		18.28

Outstanding at September 30, 2011		1,874,120			30.38

Exercisable at September 30, 2011		963,078			36.86

Summary Of Restricted Stock Activity


	Shares			Weighted Average Grant Date Fair Value
Unvested at January 1, 2011		473,637		$	26.56
Granted		124,991			33.61
Vested		(76,105	)		44.43
Forfeited		(9,986	)		32.21

Unvested at September 30, 2011		512,537			25.51

Summary Of Performance Stock Unit Activity


	Shares		Weighted Average Grant Date Fair Value
Unvested at January 1, 2011		85,629	$	20.53
Granted		41,320		33.55

Unvested at September 30, 2011		126,949		24.77

Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2010

Derivative Financial Instruments [Abstract]

Balance Sheet Location And Fair Value Of Assets And Liabilities Associated With Derivative Financial Instruments


(In thousands)	September 30, 2011		December 31, 2010
Derivatives not designated as hedging instruments:
Foreign exchange contracts:
Prepaid expenses and other current assets	$	2	$	4

Income Statement Location And Impact Of Derivative Financial Instruments


		(Gain) Loss Recognized in Income
		Nine Months Ended September 30
(In thousands)	Income Statement Location	2011			2010
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Currency exchange losses (gains)	$	(264	)	$	857

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Acquisitions (Tables)

9 Months Ended

Sep. 30, 2011

Acquisitions [Abstract]

Fair Values Of Assets Acquired And Liabilities Assumed


(In millions)	October 13 2010
Current assets (including cash of $18.6 million)	$	46.8
Property		14.0
Trade name		6.0
Acquired technology		11.0
Customer-related intangibles		27.0
Goodwill		179.9
Other noncurrent assets		3.5

Total assets acquired		288.2
Total liabilities assumed		10.0

Net assets acquired		278.2

Schedule Of Pro Forma Financial Information


	Three Months Ended September 30				Nine Months Ended September 30
(In millions, except per share amounts)	2011		2010		2011		2010
Net sales	$	298.3	$	259.3	$	869.5	$	747.2
Net income		20.0		14.7		54.5		35.9
Basic earnings per share		0.54		0.40		1.47		0.99
Diluted earnings per share		0.54		0.40		1.46		0.98

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

Assets Held For Sale (Tables)

9 Months Ended

Sep. 30, 2011

Assets Held For Sale [Abstract]

Schedule Of Assets Sold


(In thousands)	September 30 2011
Inventory	$	3,180
Property, net of depreciation		663
Goodwill		1,250
Other noncurrent assets		531

Total assets		5,624

Contingencies (Tables)

9 Months Ended

Sep. 30, 2011

Contingencies [Abstract]

Summary Of Cumulative Trauma Product Liability Claims Activity


	Nine Months Ended September 30 2011			Year Ended December 31 2010
Open claims, beginning of period		1,900			2,480
New claims		208			260
Settled and dismissed claims		(108	)		(840	)

Open claims, end of period		2,000			1,900

Summary Of Insurance Receivable Balances And Activity Related To Cumulative Trauma Product Liabilities Losses


	Nine Months Ended September 30 2011			Year Ended December 31 2010
(In millions)	Nine Months Ended September 30 2011			Year Ended December 31 2010
Balance beginning of period	$	89.0		$	91.7
Additions		29.8			30.9
Collections and settlements		(1.8	)		(33.6	)

Balance end of period		117.0			89.0

Restructuring And Other Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 1.0	$ 2.1	$ 6.1	$ 11.5
Restructuring and other charges, net of tax	$ 0.7	$ 1.4	4.0	7.5
European Segment [Member]
Restructuring Cost and Reserve [Line Items]
Staff reduction costs			3.6
North American Segment [Member]
Restructuring Cost and Reserve [Line Items]
Costs associated with collocation of certain administrative and production activities			1.5
Stay bonuses and other costs				2.4
International Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 1.0	0.8
German Voluntary Retirement Incentive Program [Member] \| European Segment [Member]
Restructuring Cost and Reserve [Line Items]
Voluntary retirement incentive program				$ 8.3

Comprehensive (Loss) Income (Components Of Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Comprehensive (Loss) Income [Abstract]
Net income	$ 20,181	$ 9,985	$ 53,158	$ 27,039
Foreign currency translation (loss) gain	(24,303)	20,985	(10,707)	768
Comprehensive (loss) income	(4,122)	30,970	42,451	27,807
Comprehensive loss (income) attributable to noncontrolling interests	1,064	(1,131)	1,115	(1,260)
Comprehensive (loss) income attributable to Mine Safety Appliances Company	$ (3,058)	$ 29,839	$ 43,566	$ 26,547

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 8, 9, 10, 11, 12, 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A5
-Appendix A

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e557-108580

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e540-108580

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6508144

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to noncontrolling interests, if any. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 24
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Comprehensive (Loss) Income (Components Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010
Comprehensive (Loss) Income [Abstract]
Cumulative translation adjustments	$ 4,772	$ 15,479
Pension and post-retirement plan adjustments	(59,795)	(59,795)
Accumulated other comprehensive loss	$ (55,023)	$ (44,316)

- Definition

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580

+ Details

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

+ Details

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Earnings Per Share [Abstract]
Net income attributable to Mine Safety Appliances Company	$ 19,972	$ 9,603	$ 52,873	$ 26,336
Preferred stock dividends	(10)	(10)	(30)	(30)
Income available to common equity	19,962	9,593	52,843	26,306
Dividends and undistributed earnings allocated to participating securities	(217)	(96)	(572)	(258)
Income available to common shareholders	$ 19,745	$ 9,497	$ 52,271	$ 26,048
Basic earnings per common share	$ 0.54	$ 0.27	$ 1.44	$ 0.73
Diluted earnings per common share	$ 0.54	$ 0.26	$ 1.42	$ 0.72
Basic shares outstanding	36,236	35,917	36,206	35,819
Stock options and other stock compensation	563	474	611	547
Diluted shares outstanding	36,799	36,391	36,817	36,366
Antidilutive stock options	896	1,263	896	1,263

Segment Information (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2010
North America [Member]
Segment Reporting Information [Line Items]
Segment net income	$ 2.2	$ 6.4
Europe [Member]
Segment Reporting Information [Line Items]
Segment net income	0.6	1.8
International [Member]
Segment Reporting Information [Line Items]
Segment net income	$ 0.5	$ 1.5

Segment Information (Reportable Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Sales to external customers	$ 298,241	$ 242,019	$ 869,473	$ 691,626
Intercompany sales
Net income (loss) attributable to Mine Safety Appliances Company	19,972	9,603	52,873	26,336
North America [Member]
Segment Reporting Information [Line Items]
Sales to external customers	143,547	111,915	412,154	327,803
Intercompany sales	26,077	22,987	76,537	61,659
Net income (loss) attributable to Mine Safety Appliances Company	18,839	12,621	44,773	31,133
Europe [Member]
Segment Reporting Information [Line Items]
Sales to external customers	71,696	61,539	211,403	174,569
Intercompany sales	27,515	21,242	86,213	64,908
Net income (loss) attributable to Mine Safety Appliances Company	1,859	280	5,540	(5,483)
International [Member]
Segment Reporting Information [Line Items]
Sales to external customers	82,998	68,565	245,916	189,254
Intercompany sales	5,703	4,450	13,720	11,920
Net income (loss) attributable to Mine Safety Appliances Company	6,666	3,800	20,509	11,727
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales to external customers
Intercompany sales	(59,295)	(48,679)	(176,470)	(138,487)
Net income (loss) attributable to Mine Safety Appliances Company	$ (7,392)	$ (7,098)	$ (17,949)	$ (11,041)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Number 210
-Article 5
-Section 03
-Paragraph 19

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-Number 210
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-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

+ Details

Pensions And Other Postretirement Benefits (Components Of Net Periodic Benefit (Credit) Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Pension plans contributions			$ 3,500		$ 4,600
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,162	$ 1,938	6,491	$ 5,811
Interest cost	4,876	4,682	14,627	14,048
Expected return on plan assets	(8,507)	(8,643)	(25,575)	(25,931)
Amortization of transition amounts	1	1	3	3
Amortization of prior service cost	26	25	78	77
Recognized net actuarial losses	108	160	594	433
Settlement loss				285
Termination benefits				1,372
Net periodic benefit (credit) cost	(1,334)	(1,837)	(3,782)	(3,902)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	218	191	654	572
Interest cost	436	432	1,306	1,297
Expected return on plan assets
Amortization of transition amounts
Amortization of prior service cost	(114)	(138)	(341)	(416)
Recognized net actuarial losses	213	210	639	630
Net periodic benefit (credit) cost	$ 753	$ 695	$ 2,258	$ 2,083

Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 262,283	$ 263,089
North America [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	199,900
Europe [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	58,900
International [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 3,500

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Goodwill And Intangible Assets (Changes In Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2011 USD ($)
Goodwill And Intangible Assets [Abstract]
Net balance at January 1, 2011	$ 263,089
Currency translation and other	(806)
Net balance at September 30, 2011	$ 262,283

- Definition

+ References

+ Details

Goodwill And Intangible Assets (Changes In Intangible Assets, Net Of Accumulated Amortization) $ in Thousands	9 Months Ended
	Sep. 30, 2011 USD ($)
Goodwill And Intangible Assets [Abstract]
Net balance at January 1, 2011	$ 53,880
Amortization expense	(4,419)
Currency translation	(361)
Net balance at September 30, 2011	$ 49,100

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010
Inventories [Abstract]
Finished products	$ 73,261	$ 71,743
Work in process	19,780	16,494
Raw materials and supplies	64,258	62,344
Total inventories	$ 157,299	$ 150,581

Stock Plans (Narrative) (Details)	9 Months Ended
Stock Plans (Narrative) (Details)	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expiration period, years	ten
Stock options exercisable period after grant date, years	three
Restricted stock vest period after grant date, years	three
Restricted stock for management retention, vesting tranches	three
Restricted stock for management retention, vesting period after grant date, years	four, five, and six years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for performance stock units	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued for performance stock units	200.00%

Stock Plans (Stock Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stock Plans [Abstract]
Stock compensation expense	$ 1,613	$ 1,471	$ 6,256	$ 5,875
Income tax benefit	595	539	2,129	2,118
Stock compensation expense, net of income tax benefit	$ 1,018	$ 932	$ 4,127	$ 3,757

Stock Plans (Summary Of Stock Option Activity) (Details)	9 Months Ended
	Sep. 30, 2011 $ / shares shares
Stock Plans [Abstract]
Outstanding at January 1, 2011, Shares \| shares	1,749,003
Outstanding at January 1, 2011, Weighted Average Exercise Price \| $ / shares	$ 29.74
Granted, Shares \| shares	166,247
Granted, Weighted Average Exercise Price \| $ / shares	$ 34.09
Exercised, Shares \| shares	(41,130)
Exercised, Weighted Average Exercise Price \| $ / shares	$ 18.28
Outstanding at September 30, 2011, Shares \| shares	1,874,120
Outstanding at September 30, 2011, Weighted Average Exercise Price \| $ / shares	$ 30.38
Exercisable at September 30, 2011, Shares \| shares	963,078
Exercisable at September 30, 2011, Weighted Average Exercise Price \| $ / shares	$ 36.86

Stock Plans (Summary Of Restricted Stock Activity) (Details)	9 Months Ended
	Sep. 30, 2011 $ / shares shares
Stock Plans [Abstract]
Unvested at January 1, 2011, Shares \| shares	473,637
Unvested at January 1, 2011, Weighted Average Grant Date Fair value \| $ / shares	$ 26.56
Granted, Shares \| shares	124,991
Granted, Weighted Average Grant Date Fair Value \| $ / shares	$ 33.61
Vested, Shares \| shares	(76,105)
Vested, Weighted Average Grant Date Fair Value \| $ / shares	$ 44.43
Forfeited, Shares \| shares	(9,986)
Forfeited, Weighted Average Grant Date Fair Value \| $ / shares	$ 32.21
Unvested at September 30, 2011, Shares \| shares	512,537
Unvested at September 30, 2011, Weighted Average Grant Date Fair Value \| $ / shares	$ 25.51

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References + Details

Stock Plans (Summary Of Performance Stock Unit Activity) (Details)	9 Months Ended
	Sep. 30, 2011 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at January 1, 2011, Shares \| shares	473,637
Unvested at January 1, 2011, Weighted Average Grant Date Fair value \| $ / shares	$ 26.56
Granted, Shares \| shares	124,991
Granted, Weighted Average Grant Date Fair Value \| $ / shares	$ 33.61
Unvested at September 30, 2011, Shares \| shares	512,537
Unvested at September 30, 2011, Weighted Average Grant Date Fair Value \| $ / shares	$ 25.51
Performance Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at January 1, 2011, Shares \| shares	85,629
Unvested at January 1, 2011, Weighted Average Grant Date Fair value \| $ / shares	$ 20.53
Granted, Shares \| shares	41,320
Granted, Weighted Average Grant Date Fair Value \| $ / shares	$ 33.55
Unvested at September 30, 2011, Shares \| shares	126,949
Unvested at September 30, 2011, Weighted Average Grant Date Fair Value \| $ / shares	$ 24.77

- Definition

+ References + Details

Derivative Financial Instruments (Balance Sheet Location And Fair Value Of Assets And Liabilities Associated With Derivative Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Dec. 31, 2010
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Prepaid expenses and other current assets	$ 2	$ 4

Derivative Financial Instruments (Income Statement Location And Impact Of Derivative Financial Instruments) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contracts	$ (264)	$ 857

- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References + Details

Income Taxes (Details) $ in Millions	Sep. 30, 2011 USD ($)
Income Taxes [Abstract]
Unrecognized tax benefits	$ 11.8
Recognized tax benefits	10.5
Unrecognized tax benefits in interest expense and penalties	$ 1.0

Fair Value Of Financial Instruments (Details) $ in Millions	Sep. 30, 2011 USD ($)
Fair Value Of Financial Instruments [Abstract]
Carrying amount of fixed rate long-term debt	$ 168.0
Fair value of long-term debt	$ 175.9

Acquisitions (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
Acquisitions (Narrative) (Details) $ in Thousands	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Oct. 13, 2010 USD ($)
Business Acquisition [Line Items]
Goodwill					$ 179,900
Sales	$ 300,639	$ 243,058	$ 873,826	$ 693,985
Net income	20,181	$ 9,985	$ 53,158	$ 27,039
General Monitors, Inc [Member]
Business Acquisition [Line Items]
Total acquisition price of General Monitors, Inc.					278,200
Contingent considerations					0
Escrow deposit, amount					$ 38,000
Expiration date of escrow agreement, in years					two
Acquisition price					$ 264,000
Revolving credit facility for borrowings					250,000
Weighted-average amortization period of identifiable intangible assets acquired, in years			16
Identifiable intangible assets, future amortization expense			$ 3,300
Sales	22,200		63,500
Net income	4,800		11,200
Net income including one-time increase in cost of sales			2,300
Net income including one-time increase in cost of sales, after tax			1,500
Future Amortization Expense, Year One			3,300
Future Amortization Expense, Year Two			3,300
Future Amortization Expense, Year Three			3,300
Future Amortization Expense, Year Four			3,300
Future Amortization Expense, Year Five			3,300
General Monitors, Inc [Member] \| North American Segment [Member]
Business Acquisition [Line Items]
Goodwill	136,700		136,700
Fair value of acquired inventory	4,800		4,800
General Monitors, Inc [Member] \| European Segment [Member]
Business Acquisition [Line Items]
Goodwill	43,200		$ 43,200
General Monitors, Inc [Member] \| 4.00% Series A Senior Notes [Member]
Business Acquisition [Line Items]
Issuance of senior notes					$ 100,000
Senior Notes, interest percentage					4.00%
Senior Notes, maturity date			October 13, 2021
Senior notes, number of annual installments			five
Senior notes, annual principal payment	$ 20,000		$ 20,000

Acquisitions (Fair Values Of Assets Acquired And Liabilities Assumed) (Details) $ in Millions	Oct. 13, 2010 USD ($)
Business Acquisition [Line Items]
Current assets (including cash of $18.6 million)	$ 46.8
Property	14.0
Goodwill	179.9
Other noncurrent assets	3.5
Total assets acquired	288.2
Total liabilities assumed	10.0
Net assets acquired	278.2
Cash attributable to current assets	18.6
Trade Name [Member]
Business Acquisition [Line Items]
Intangible assets	6.0
Acquired Technology [Member]
Business Acquisition [Line Items]
Intangible assets	11.0
Customer-Related Intangibles [Member]
Business Acquisition [Line Items]
Intangible assets	$ 27.0

Acquisitions (Schedule Of Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Acquisitions [Abstract]
Net sales	$ 298.3	$ 259.3	$ 869.5	$ 747.2
Net income	$ 20.0	$ 14.7	$ 54.5	$ 35.9
Basic earnings per share	$ 0.54	$ 0.40	$ 1.47	$ 0.99
Diluted earnings per share	$ 0.54	$ 0.40	$ 1.46	$ 0.98

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

Assets Held For Sale (Details) $ in Thousands	Sep. 30, 2011 USD ($)
Assets Held For Sale [Abstract]
Inventory	$ 3,180
Property, net of depreciation	663
Goodwill	1,250
Other noncurrent assets	531
Total assets	5,624
Assets related to sale	8,400
Expected pre-tax gain on sale of assets	$ 1,000

Contingencies (Narrative) (Details) $ in Millions	9 Months Ended		36 Months Ended
Contingencies (Narrative) (Details) $ in Millions	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Loss Contingencies [Line Items]
Number of lawsuits	2,000		1,900	2,480
Insurance receivables	$ 117.0		$ 89.0	$ 91.7
Single Incident [Member]
Loss Contingencies [Line Items]
Product liability reserve	$ 4.7		5.2
Cumulative Trauma [Member]
Loss Contingencies [Line Items]
Product liability expense			90.3
Number of lawsuits	2,000
Minimum number of insurance carriers	20
Insurance receivables	$ 117.0		$ 89.0
Uninsured Cumulative Trauma [Member]
Loss Contingencies [Line Items]
Product liability expense	0.0	$ 0.0
Uninsured defense costs	0.6	$ 0.5
Other Current Assets [Member]
Loss Contingencies [Line Items]
Insurance receivables	2.0
Other Non-Current Assets [Member]
Loss Contingencies [Line Items]
Insurance receivables	$ 115.0

Contingencies (Summary Of Cumulative Trauma Product Liability Claims Activity) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Contingencies [Abstract]
Open claims, beginning of period	1,900	2,480
New claims	208	260
Settled and dismissed claims	(108)	(840)
Open claims, end of period	2,000	1,900

Contingencies (Summary Of Insurance Receivable Balances And Activity Related To Cumulative Trauma Product Liabilities Losses) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Contingencies [Abstract]
Balance beginning of period	$ 89.0	$ 91.7
Additions	29.8	30.9
Collections and settlements	(1.8)	(33.6)
Balance end of period	$ 117.0	$ 89.0

Subsequent Events (Details) $ in Millions	1 Months Ended
Subsequent Events (Details) $ in Millions	Oct. 31, 2011 USD ($)
Subsequent Events
Equity ownership percentage of Safety Works, LLC	73.00%
Pre-tax gain on sale of former headquarters building	$ 1.0