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Condensed Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Trade receivables, allowance for doubtful accounts | $ 7,862us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 7,821us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, par value (dollars per share) | $ 0us-gaap_CommonStockNoParValue | $ 0us-gaap_CommonStockNoParValue
Preferred Stock, 4 1/2% Cumulative |  |
Percentage of cumulative preferred stock | 4.50%msa_PercentageOfCumulativePreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 4.50%msa_PercentageOfCumulativePreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember
Preferred stock, par value (dollars per share) | $ 50us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | $ 50us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember

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