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Commitments and Contingencies - Legal Matters - Additional Information (Detail) | 3 Months Ended | 171 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) Case | Sep. 30, 2014 USD ($) | Mar. 31, 2016 USD ($) Case | Dec. 31, 2015 Case
Commitments And Contingencies Disclosure [Abstract] |  |  |  |
Cumulative settlement payments for cases involving asbestos-related claims | $ |  | $ 500,000 | $ 900,000 |
Average cost per settled claim excluding legal fees | $ | $ 25,000 |  | $ 25,000 |
Number of claims pending | 238 |  | 238 | 221
Number of new cases filed | 21 |  |  |
Number of cases dismissed | 4 |  |  |
Number of cases settled | 0 |  |  |
Settlement recovering expense | $ |  | $ 200,000 |  |
Assessment regarding Loss contingency impact Description | We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows. |  |  |

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