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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 151 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 Asbestos [Member] Claim | Mar. 31, 2014 Asbestos [Member] Claim | Mar. 31, 2014 Asbestos [Member] Minimum [Member] | Mar. 31, 2014 Asbestos [Member] Maximum [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |
Pending claims, approximate number |  |  | 2,310 | 2,310 |  |
Reimbursement from insurance carrier for settled claims |  |  |  | $ 15,200,000 |  |
Estimated legal costs |  |  |  |  | 24,400,000 | 37,400,000
Increase for low end of range |  |  | 2,700,000 |  |  |
Decrease for high end of range |  |  | 4,100,000 |  |  |
Range of possible loss, minimum |  |  | 27,400,000 | 27,400,000 |  |
Range of possible loss, maximum |  |  | 48,100,000 | 48,100,000 |  |
Changes in product warranties [Roll forward] |  |  |  |  |  |
Balance, beginning of period | 18,041,000 | 17,288,000 |  |  |  |
Liabilities accrued for current year sales | 19,191,000 | 18,356,000 |  |  |  |
Settlements of warranty claims | (16,858,000) | (16,230,000) |  |  |  |
Balance, end of period | $ 20,374,000 | $ 19,414,000 |  |  |  |

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