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Commitments and Contingencies - Asbestos Claimant and Settlement (Details) (Asbestos [Member], USD $) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 claimants | Dec. 31, 2011 claimants
Asbestos [Member] |  |
Loss Contingencies [Line Items] |  |
Number of pending claims at beginning of period | 8,048 | 8,200
Number of pending claims filed during period | 185 | 476
Number of pending claims dismissed during period | 310 | 607
Number of pending claims settled during period | 12 | 21
Average settlement amount per claim during period | $ 17,858 | $ 14,300
Total defense costs during period | $ 1,460,000 | $ 2,510,000

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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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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