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Acquisitions Acquisitions - Other Acquisitions (Details) (USD $) | 3 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Series of Individually Immaterial Business Acquisitions [Member] | Dec. 31, 2011 Series of Individually Immaterial Business Acquisitions [Member] | Dec. 31, 2010 Series of Individually Immaterial Business Acquisitions [Member] | Jun. 30, 2012 CIFAL [Member] | Jun. 30, 2012 Engetran [Member] | Jun. 30, 2012 Trail Com [Member] | Dec. 31, 2011 Innovative Molding [Member] | Dec. 31, 2011 Lamons India [Member] | Dec. 31, 2011 BTM Manufacturing [Member] | Dec. 31, 2010 Taylor-Wharton Cylinder [Member] | Dec. 31, 2010 South Texas Bolt and Fitting [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  |  |  |  |  |  |  |  |  |  | $ 27,000,000 | $ 31,700,000 | $ 29,100,000 |  |  |  | $ 27,000,000 | $ 2,100,000 | $ 2,600,000 | $ 11,100,000 | $ 18,000,000
Business Acquisition, Deferred Purchase Price and Contingent Consideration |  |  |  |  |  |  |  |  |  |  |  | 14,000,000 |  |  |  |  |  |  |  |  |  |
Net sales | 301,040,000 | 335,870,000 | 338,430,000 | 297,570,000 | 259,650,000 | 277,660,000 | 288,090,000 | 258,560,000 | 1,272,910,000 | 1,083,960,000 | 902,460,000 |  |  |  | 9,000,000 | 6,000,000 | 12,000,000 |  |  |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000 |

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