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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2010	Oct. 28, 2010
Statement [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2010
Document Fiscal Year Focus	2010
Document Fiscal Period Focus	Q3
Trading Symbol	MSA
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		36,326,886

CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010	Sep. 30, 2009
Statement [Line Items]
Net sales	$ 242,019	$ 228,486	$ 691,626	$ 673,893
Other income	1,039	150	2,359	1,681
Revenues, Total	243,058	228,636	693,985	675,574
Costs and expenses
Cost of products sold	151,340	145,354	428,268	422,469
Selling, general and administrative	61,185	57,313	184,005	170,174
Research and development	7,938	7,119	23,956	21,405
Restructuring and other charges	2,082	840	11,509	9,901
Interest	1,686	1,681	4,911	5,442
Currency exchange losses (gains)	3,545	42	(90)	(305)
Costs and Expenses, Total	227,776	212,349	652,559	629,086
Income before income taxes	15,282	16,287	41,426	46,488
Provision for income taxes	5,297	5,154	14,387	15,754
Net income	9,985	11,133	27,039	30,734
Net (income) loss attributable to noncontrolling interests	(382)	(179)	(703)	(101)
Net income attributable to Mine Safety Appliances Company	$ 9,603	$ 10,954	$ 26,336	$ 30,633
Earnings per share attributable to Mine Safety Appliances Company common shareholders
Basic	$ 0.27	$ 0.31	$ 0.73	$ 0.86
Diluted	0.26	0.30	0.72	0.85
Dividends per common share	$ 0.25	$ 0.24	$ 0.74	$ 0.72

CONDENSED CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Sep. 30, 2010	Dec. 31, 2009
Current assets
Cash and cash equivalents	$ 47,413	$ 61,983
Trade receivables, less allowance for doubtful accounts of $7,462 and $6,866	186,128	173,355
Inventories	142,600	123,944
Deferred tax assets	21,256	25,109
Income taxes receivable	8,001	4,054
Prepaid expenses and other current assets	33,198	45,580
Total current assets	438,596	434,025
Property, less accumulated depreciation of $314,104 and $306,170	141,114	144,575
Prepaid pension cost	115,415	105,812
Deferred tax assets	12,167	10,870
Goodwill	84,874	84,727
Other noncurrent assets	118,783	95,219
Total assets	910,949	875,228
Current liabilities
Notes payable and current portion of long-term debt	51,447	16,326
Accounts payable	55,589	43,487
Employees' compensation	32,025	25,811
Insurance and product liability	14,244	24,164
Taxes on income	5,252	10,090
Other current liabilities	47,544	48,572
Total current liabilities	206,101	168,450
Long-term debt	72,106	82,114
Pensions and other employee benefits	126,973	125,387
Deferred tax liabilities	45,075	44,800
Other noncurrent liabilities	14,012	15,077
Total liabilities	464,267	435,828
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 36,324,686 and 35,972,518 shares)	80,550	74,269
Stock compensation trust - 1,711,611 and 2,174,204 shares	(8,935)	(11,349)
Treasury shares, at cost:
Accumulated other comprehensive loss	(45,088)	(45,856)
Retained earnings	673,559	674,019
Total Mine Safety Appliances Company shareholders' equity	442,638	436,616
Noncontrolling interests	4,044	2,784
Total shareholders' equity	446,682	439,400
Total liabilities and equity	910,949	875,228
Preferred stock, 4 1/ 2% cumulative
Treasury shares, at cost:
Preferred stock	3,569	3,569
Second cumulative preferred voting stock
Treasury shares, at cost:
Preferred stock
Preferred stock, 4 1/ 2% cumulative
Treasury shares, at cost:
Treasury shares, at cost	(1,753)	(1,753)
Common stock
Treasury shares, at cost:
Treasury shares, at cost	$ (259,264)	$ (256,283)

CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2010	Dec. 31, 2009
Statement [Line Items]
Trade receivables, allowance for doubtful accounts	$ 7,462	$ 6,866
Property, accumulated depreciation	$ 314,104	$ 306,170
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, outstanding	36,324,686	35,972,518
Stock compensation trust, shares	1,711,611	2,174,204
Preferred stock, 4 1/ 2% cumulative
Statement [Line Items]
Preferred stock, authorized	100,000	100,000
Preferred stock, par value	$ 50	$ 50
Preferred stock, issued	71,373	71,373
Preferred stock, callable per share	$ 52.50	$ 52.50
Second cumulative preferred voting stock
Statement [Line Items]
Preferred stock, authorized	1,000,000	1,000,000
Preferred stock, par value	$ 10	$ 10
Preferred stock, issued	0	0
Preferred stock, 4 1/ 2% cumulative
Statement [Line Items]
Treasury shares, shares	52,878	52,878
Common stock
Statement [Line Items]
Treasury shares, shares	24,045,094	23,934,669

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2009
Operating Activities
Net income	$ 27,039	$ 30,734
Depreciation and amortization	20,541	20,282
Pensions	(3,902)	184
Net (gain) loss from investing activities	(834)	261
Stock-based compensation	5,875	4,622
Deferred income tax benefit	(2,115)	(1,271)
Other noncurrent assets and liabilities	(26,574)	(21,864)
Other, net	(3,980)	(2,979)
Operating cash flow before changes in working capital	16,050	29,969
Trade receivables	(11,783)	23,869
Inventories	(17,841)	30,672
Accounts payable and accrued liabilities	6,439	(15,450)
Income taxes receivable, prepaid expenses and other current assets	8,700	18,081
(Increase) decrease in working capital	(14,485)	57,172
Cash flow from operating activities	1,565	87,141
Investing Activities
Property additions	(16,629)	(20,729)
Property disposals	164	244
Other investing	1,250	(134)
Cash flow from investing activities	(15,215)	(20,619)
Financing Activities
Proceeds from (payments on) short-term debt, net	35,108	(23,185)
Payments on long-term debt	(10,000)	(12,000)
Cash dividends paid	(26,796)	(25,881)
Company stock purchases	(2,981)	(107)
Exercise of stock options	3,049	84
Excess tax provision related to stock plans	(229)	(495)
Cash flow from financing activities	(1,849)	(61,584)
Effect of exchange rate changes on cash	929	2,749
(Decrease) increase in cash and cash equivalents	(14,570)	7,687
Beginning cash and cash equivalents	61,983	50,894
Ending cash and cash equivalents	$ 47,413	$ 58,581

Restructuring and Other Charges	9 Months Ended
Restructuring and Other Charges	Sep. 30, 2010
Statement [Line Items]
Restructuring and Other Charges	(2) Restructuring and Other Charges 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 (German VRIP). During the first quarter of 2010, 27 employees made irrevocable elections to retire under the terms of the German VRIP. German VRIP termination benefit expense of $5.0 million was recorded in March 2010. The remaining $3.3 million European segment charges related primarily to staff reductions and our ongoing efforts to reorganize our European operations. North American segment charges for the nine months ended September 30, 2010 of $2.4 million included stay bonuses and other costs associated with our initiative to transfer certain production activities. 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. During the three and nine month periods ended September 30, 2009, we recorded charges of $0.8 million ($0.5 million after tax) and $9.9 million ($6.3 million after tax), respectively. North American segment charges of $8.7 million for the nine months ended September 30, 2009 related primarily to a focused voluntary retirement incentive program (North American VRIP). During January 2009, 61 North American segment employees made irrevocable elections to retire under the terms of the North American VRIP. North American VRIP non-cash special termination benefits expense of $6.7 million was recorded in January 2009. The remaining $2.0 million of North American segment charges related to layoffs and stay bonuses and other costs associated with our ongoing initiative to transfer certain production activities. European and International segment charges for the nine months ended September 30, 2009 of $0.4 million and $0.8 million, respectively, were primarily for severance costs related to staff reductions in Germany, Brazil, Australia and South Africa.

Segment Information

9 Months Ended

Sep. 30, 2010

Statement [Line Items]

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, 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 (loss) attributable to Mine Safety Appliances Company		10,463		(301	)		3,317		(3,876	)		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		24,732		(7,247	)		10,266		(1,415	)		26,336

Three Months Ended September 30, 2009
Sales to external customers	$	107,054	$	64,937		$	56,495	$	—		$	228,486
Intercompany sales		13,771		17,773			5,094		(36,638	)		—
Net income (loss) attributable to Mine Safety Appliances Company		10,767		(1,060	)		1,666		(419	)		10,954

Nine Months Ended September 30, 2009
Sales to external customers	$	330,133	$	186,611		$	157,149	$	—		$	673,893
Intercompany sales		42,637		63,294			10,585		(116,516	)		—
Net income attributable to Mine Safety Appliances Company		25,403		2,155			3,031		44			30,633

Reconciling items consist primarily of intercompany eliminations and items reported at the corporate level. The loss of $3.9 million reported in reconciling items for the three months ended September 30, 2010 was primarily related to currency exchange losses and costs associated with acquisition activities.

In 2010, we changed the composition of our European and International segments to reflect new management responsibilities. Under the new structure, our operations in the Middle East, Egypt and India are reported in the European segment. Previously these operations were reported in the International segment. Comparative 2009 amounts have been revised to conform to the current year presentation. The effect of the revisions for the three months ended September 30, 2009 increased European segment sales and net income by $5.6 million and $0.6 million, respectively, and decreased International segment sales and net income by the corresponding amounts. The effect for the nine months ended September 30, 2009 increased European segment sales and net income by $14.5 million and $1.3 million, respectively, and decreased International segment sales and net income by the corresponding amounts.

Pensions and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2010

Statement [Line Items]

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)	2010			2009			2010			2009
Three months ended September 30
Service cost	$	1,938		$	2,016		$	191		$	181
Interest cost		4,682			4,742			432			469
Expected return on plan assets		(8,643	)		(8,905	)		—			—
Amortization of transition amounts		1			1			—			—
Amortization of prior service cost		25			34			(138	)		(87	)
Recognized net actuarial losses		160			65			210			263

Net periodic benefit (credit) cost		(1,837	)		(2,047	)		695			826

Nine months ended September 30
Service cost	$	5,811		$	5,907		$	572		$	543
Interest cost		14,048			14,005			1,297			1,409
Expected return on plan assets		(25,931	)		(26,428	)		—			—
Amortization of transition amounts		3			4			—			—
Amortization of prior service cost		77			103			(416	)		(263	)
Recognized net actuarial losses		433			182			630			787
Settlement loss		285			—			—			—
Termination benefits		1,372			6,411			—			250

Net periodic benefit (credit) cost		(3,902	)		184			2,083			2,726

We made contributions of $3.5 million to our pension plans during the nine month period ended September 30, 2010. We expect to make total contributions of approximately $4.6 million to our pension plans in 2010.

Stock Plans

9 Months Ended

Sep. 30, 2010

Statement [Line Items]

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)	2010		2009		2010		2009
Stock compensation expense	$	1,471	$	1,248	$	5,875	$	4,622
Income tax benefit		539		445		2,118		1,642

Stock compensation expense, net of income tax benefit		932		803		3,757		2,980

A summary of stock option activity for the nine months ended September 30, 2010 follows:


	Shares			Weighted Average Exercise Price
Outstanding at January 1, 2010		2,085,075		$	25.01
Granted		323,978			25.06
Exercised		(314,060	)		9.71
Expired		(9,485	)		46.73

Outstanding at September 30, 2010		2,085,508			27.23

Exercisable at September 30, 2010		1,128,264			27.90

A summary of restricted stock activity for the nine months ended September 30, 2010 follows:


	Shares			Weighted Average Grant Date Fair Value
Unvested at January 1, 2010		338,206		$	28.99
Granted		170,824			25.08
Vested		(45,989	)		39.93

Unvested at September 30, 2010		463,041			26.46

A summary of performance stock unit activity for the nine months ended September 30, 2010 follows:


	Shares			Weighted Average Grant Date Fair Value
Unvested at January 1, 2010		61,974		$	17.83
Granted		41,984			24.63
Performance adjustment		(15,494	)		17.83

Unvested at September 30, 2010		88,464			21.06

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2010

Statement [Line Items]

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, 2010, the notional amount of open forward contracts was $40.3 million and the unrealized gain on these contracts was $0.7 million. All open forward contracts will mature during the fourth quarter of 2010.

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

Derivatives not designated as hedging instruments:


(In thousands)	September 30, 2010		December 31, 2009
Foreign exchange contracts:
Prepaid expenses and other current assets	$	711	$	—
Other current liabilities		—		289

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

Amount
Recognized in Income

Nine Months Ended
September 30

(In thousands)

Income Statement
Location

2010

2009

Derivatives not designated as hedging instruments:

Foreign exchange contracts

Currency exchange
losses (gains)

857

2,822

Fair Value Measurements

9 Months Ended

Sep. 30, 2010

Statement [Line Items]

Fair Value Measurements

(12) Fair Value Measurements

On January 1, 2008, we adopted the Financial Accounting Standards Board (FASB) statement on fair value measurements, as it relates to financial assets and liabilities that are remeasured and reported at least annually. On January 1, 2009, we adopted the FASB statement on fair value measurements as it relates to nonfinancial assets and liabilities that are recognized and disclosed at fair value in the financial statements on a nonrecurring basis.

The FASB statement defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. Our adoption of this statement, as it relates to financial and nonfinancial assets and liabilities, had no impact on consolidated results of operations, financial condition or liquidity.

The FASB statement 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. This standard is now the single source under generally accepted accounting principles for the definition of fair value, except for the fair value of leased property. The FASB statement 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 within the scope of the FASB statement were limited to the derivative financial instruments described in Notes 10 and 13. We estimate the fair value of these financial instruments, consisting of foreign currency forward contracts and fixed rate long-term debt, 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.

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2010
Statement [Line Items]
Contingencies	(14) Contingencies Various lawsuits and claims arising in the normal course of business are pending against us. These lawsuits are primarily product liability claims. We are presently named as a defendant in approximately 1,900 lawsuits, primarily involving respiratory protection products allegedly manufactured and sold by us. Collectively, these lawsuits represent a total of approximately 8,900 plaintiffs. Approximately 90% of these lawsuits involve plaintiffs alleging they suffer from silicosis, with the remainder alleging they suffer from other or combined injuries, including asbestosis. These lawsuits typically allege that these conditions resulted in part from respirators that were negligently designed or manufactured by us. Consistent with the experience of other companies involved in silica and asbestos-related litigation, in recent years there has been an increase in the number of asserted claims that could potentially involve us. We cannot determine our potential maximum liability for such claims, in part because the defendants in these lawsuits are often numerous, and the claims generally do not specify the amount of damages sought. With some limited exceptions, we maintain insurance against product liability claims. We also maintain a reserve for uninsured product liability based on expected settlement charges for pending claims and an estimate of unreported claims derived from experience, sales volumes, and other relevant information. We evaluate our exposures on an ongoing basis and make adjustments to the reserve as appropriate. Based on information currently available, we believe that the disposition of matters that are pending will not have a materially adverse effect on our results of operations or financial condition. In the normal course of business, we make payments to settle product liability claims and for related legal fees and record receivables for the amounts covered by insurance. Various factors could affect the timing and amount of recovery of 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. 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 vigorously pursuing the legal actions necessary to collect all amounts. On April 9, 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 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 the 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 impact our operating results. During July 2010, we resolved the 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 impact our operating results. On July 26, 2010, we filed a complaint in Delaware state court 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 was to secure a comprehensive resolution of our rights under the insurance policies issued by our insurers. We regularly evaluate the collectibility of insurance receivables and record the amounts that we conclude are probable of collection based on our analysis of our various policies, pertinent case law interpreting comparable policies and our experience with similar claims. Insurance receivables totaled $78.0 million at September 30, 2010, all of which is reported in other non-current assets. Insurance receivables totaled $91.7 million at December 31, 2009. Based upon our evaluation of applicable insurance coverage and our ongoing insurance recovery efforts, we believe that the recorded balances are fully recoverable.

Recently Adopted and Recently Issued Accounting Standards	9 Months Ended
	Sep. 30, 2010
Statement [Line Items]
Recently Adopted and Recently Issued Accounting Standards	(15) Recently Adopted and Recently Issued Accounting Standards In December 2007, the FASB issued a statement that requires the recognition of a noncontrolling interest (minority interest) as equity in the consolidated financial statements and separate from the parent’s equity. The amount of net income attributable to the noncontrolling interest is to be included in consolidated net income on the face of the income statement. The statement also amended certain consolidation procedures and expanded disclosure requirements regarding the interests of the parent and its noncontrolling interest. The adoption of the new statement on January 1, 2009 is reflected in these financial statements and did not have a material effect on our consolidated results of operations or financial condition. In March 2008, the FASB issued a statement that requires companies to provide disclosures about (a) how and why derivative instruments are used, (b) how derivative instruments and related hedged items are accounted for, and (c) how derivative instruments and related hedged items affect the company’s financial position, financial performance, and cash flows. We adopted the new statement on January 1, 2009. See note 10 for disclosures related to derivative instruments and hedging activities. In April 2008, the FASB issued a staff position that amends the factors that should be considered in developing renewal or extension assumptions used to determine the useful life of a recognized intangible asset. The objective of this staff position is to improve the consistency between the useful life of a recognized intangible asset and the period of expected cash flows used to measure the fair value of the asset. This staff position applies to all intangible assets, whether acquired in a business combination or otherwise, and is to be applied prospectively to intangible assets acquired on or after January 1, 2009. The adoption of this staff position did not have a material effect on our consolidated financial statements. In April 2009, the FASB issued a staff position that requires disclosures about the fair value of financial instruments for interim reporting periods as well as in annual financial statements. We adopted this staff position for our second quarter 2009 interim reporting period. See note 13 for disclosures related to the fair value of financial instruments. In May 2009, the FASB issued a statement that establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or are available to be issued. Specifically, the statement sets forth the period after the balance sheet date during which management of a reporting entity should evaluate events or transactions that may occur for potential recognition or disclosure in the financial statements, the circumstances under which an entity should recognize events or transactions occurring after the balance sheet date in its financial statements, and the disclosures that an entity should make about events or transactions that occurred after the balance sheet date. Our adoption of the new statement on June 30, 2009 had no impact on the financial statements as management already followed a similar approach prior to the adoption of this standard. In June 2009, the FASB issued a statement that removes the concept of a qualifying special-purpose entity and clarifies the objective of determining whether a transferor and all of the entities included in the transferor’s financial statements being presented have surrendered control over transferred financial assets. The adoption of this statement on January 1, 2010 did not have a material effect on our consolidated financial statements. In June 2009, the FASB issued a statement that amends the consolidation guidance applicable to variable interest entities. The adoption of this statement on January 1, 2010 did not have a material effect on our consolidated financial statements.

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2010
Statement [Line Items]
Subsequent Events	(16) Subsequent Events On October 13, 2010, we acquired 100% of General Monitors for $280.0 million in cash, along with the assumption of certain liabilities. The purchase price is subject to a working capital adjustment. There is no contingent consideration. General Monitors, which is headquartered in Lake Forest, California, 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 of General Monitors significantly enhances our fixed gas detection capabilities by providing us with world-class research and development talent and an industry-leading product line. Goodwill related to the General Monitors acquisition, which is expected to be primarily included in the North American and European operating segments, is expected to be deductible for tax purposes. Our results for the three and nine months ended September 30, 2010 include transaction and integration costs of $2.5 million ($1.6 million after tax). These costs are reported in selling, general and administrative expenses. We expect that additional transaction and integration costs of approximately $4.5 million ($2.9 million after tax) will be incurred during the fourth quarter of 2010. General Monitors operating results will be included in our financial statements from the acquisition date. At the date of issuance of these financial statements, the initial purchase accounting was not complete. On October 13, 2010, we entered into a credit agreement establishing an unsecured senior revolving credit facility. The revolving facility provides for borrowings of up to $250.0 million and matures in October 2015. Borrowings made under the facility may be used for general corporate purposes, including working capital, permitted acquisitions, capital expenditures and repayment of existing debt. Borrowings under the revolving credit facility will bear interest at a variable annual rate. The credit agreement also provides for an uncommitted incremental facility that permits us to request an increase in the senior revolving credit facility of up to $50.0 million. On October 13, 2010, we issued $100.0 million in 4.00% Series A Senior Notes. The 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 beginning January 13, 2011. The notes are unsecured. Management has evaluated subsequent events and has concluded that all events that would require recognition or disclosure are appropriately reflected in the financial statements.

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2010
Statement [Line Items]
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 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.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2010
Statement [Line Items]
Income Taxes	(11) Income Taxes At September 30, 2010, we had a gross liability for unrecognized tax benefits of $9.1 million. We have recognized tax benefits associated with these liabilities of $7.4 million at September 30, 2010. There have been no significant changes to the balances since December 31, 2009. 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 $0.7 million at September 30, 2010.

Fair Value of Financial Instruments	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2010
Statement [Line Items]
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, 2010, the reported carrying amount of our fixed rate long-term debt was $76.0 million and the fair value was $85.0 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, 2010.