XML 32 R57.htm IDEA: XBRL DOCUMENT v2.4.1.9

Capital Stock - Summary of Common Stock Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balances (in shares)	37,202,099us-gaap_CommonStockSharesOutstanding
Stock options exercised (in shares)	190,743us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	277,687us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	223,022us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Ending Balances (in shares)	37,448,310us-gaap_CommonStockSharesOutstanding	37,202,099us-gaap_CommonStockSharesOutstanding
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balances (in shares)	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Ending Balances (in shares)	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	62,081,391us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Beginning Balances	132,055us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	112,135us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	97,276us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Performance stock forfeitures	(33)us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationForfeited / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Tax benefit related to stock plans	2,573us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	2,246us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	2,799us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Other, net			(77)us-gaap_StockholdersEquityOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Ending Balances	148,401us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	132,055us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	112,135us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Stock Compensation Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balances (in shares)				(1,162,784)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Ending Balances (in shares)	0us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(303,668)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(745,430)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(1,162,784)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Beginning Balances				(6,070)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Ending Balances	0us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(1,585)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(3,891)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	(6,070)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balances (in shares)				(24,226,017)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Ending Balances (in shares)	(24,633,081)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(24,575,624)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(24,328,162)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(24,226,017)us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Beginning Balances				(264,479)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Ending Balances	(284,805)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(279,772)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(267,987)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(264,479)us-gaap_CommonStockValueOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Restricted Stock | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards	(538)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(505)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(711)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Share-based compensation expense	4,372us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	4,244us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	4,891us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Restricted stock forfeitures	(346)us-gaap_RestrictedStockAwardForfeitures / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(115)us-gaap_RestrictedStockAwardForfeitures / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(147)us-gaap_RestrictedStockAwardForfeitures / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Restricted Stock | Stock Compensation Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards (in shares)	72,291us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	96,686us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	136,295us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Restricted stock awards	377us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	505us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	711us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Restricted Stock | Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards (in shares)	13,936us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Restricted stock forfeitures (in shares)	(4,078)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(7,365)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(10,815)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Restricted stock awards	161us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Stock Options | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	2,355us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	2,825us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	2,435us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Stock options exercised	5,678us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	8,194us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	3,141us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Stock Options | Stock Compensation Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)	150,962us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	277,687us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	223,022us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Stock options exercised	788us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	1,449us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	1,165us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Stock Options | Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)	39,781us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Stock options exercised	460us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Performance Shares | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	2,705us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	3,383us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	2,831us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Performance stock issued	(420)us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(352)us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	(303)us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Performance Shares | Stock Compensation Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Performance stock issued (in shares)	80,415us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	67,389us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	58,037us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Performance stock issued	420us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	352us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember	303us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_StatementClassOfStockAxis = msa_StockCompensationTrustMember
Treasury Stock | Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares purchased (in shares)	(107,096)us-gaap_TreasuryStockSharesAcquired / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(240,097)us-gaap_TreasuryStockSharesAcquired / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(91,330)us-gaap_TreasuryStockSharesAcquired / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember
Treasury shares purchased	(5,654)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(11,785)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember	(3,508)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_AwardTypeAxis = us-gaap_TreasuryStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_TreasuryStockMember

X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockValueOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_IncreaseDecreaseInStockholdersEquityRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total value of forfeitures related to restricted stock awards forfeited during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_RestrictedStockAwardForfeitures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Value of forfeitures of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph c(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationForfeited
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.

+ References

No definition available.

+ Details

Name:	us-gaap_StockholdersEquityOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of shares related to Restricted Stock Award forfeited during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate value of stock related to Restricted Stock Awards issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Value of stock issued as a result of the exercise of stock options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29-31)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

Name:	us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_TreasuryStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=msa_StockCompensationTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_TreasuryStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: