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Commitments and Contingencies - Activity Related to Asbestos Claims (Detail) - Asbestos Related Matters [Member] - Claim Claim in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Number of Pending Claims [Roll Forward] |  |  |  |
Pending claims - Beginning |  | 62 | 79 | 96
New claims |  | 4 | 4 | 5
Settlements |  | (1) | (2) | (3)
Dismissals | [1] | (28) | (19) | (19)
Pending claims - Ending |  | 37 | 62 | 79
Inactive [Member] |  |  |  |
Number of Pending Claims [Roll Forward] |  |  |  |
Pending claims - Beginning |  | 13 | 13 |
Pending claims - Ending |  | 0 | 13 | 13
Active [Member] |  |  |  |
Number of Pending Claims [Roll Forward] |  |  |  |
Pending claims - Beginning |  | 49 | 66 |
Pending claims - Ending |  | 37 | 49 | 66
[1] | (a)Inactive claims represent pending claims in Mississippi filed in 2004 or prior, which have been excluded from our asbestos measurement because the plaintiffs cannot demonstrate a significant compensable loss. As of December 31, 2015, all inactive claims have been dismissed.

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