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Commitments and Contingencies - Asbestos Claimant and Settlement (Details) (Asbestos [Member], USD $) | 12 Months Ended
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Dec. 31, 2012 claimants | Dec. 31, 2011 claimants | Dec. 31, 2010 claimants
Asbestos [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of pending claims at the beginning of period | 8,048 | 8,200 | 7,816
Number of pending claims filed during period | 367 | 476 | 892
Number of pending claims dismissed during period | 519 | 607 | 456
Number of pending claims settled during period | 16 | 21 | 52
Average settlement amount per claim during period | $ 14,513 | $ 14,300 | $ 7,029
Total defense costs during period | $ 2,650,000 | $ 2,510,000 | $ 2,870,000

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- Definition Number of Plaintiffs who had their claims dismissed during the period. + References No definition available. + Details
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- Definition Average amount of consideration the entity has agreed to pay to settle a legal matter for claims settled during the period. + References No definition available. + Details
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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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