Litigation - Summary of Activity in Asbestos Insurance Recoveries (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Loss Contingencies [Line Items] | ||
Insurance receivable - asbestos, beginning of the year | $ 115,945 | |
Insurance receivable - asbestos, end of the year | 100,342 | $ 115,945 |
Asbestos Claims [Member] | ||
Loss Contingencies [Line Items] | ||
Insurance receivable - asbestos, beginning of the year | 115,945 | 125,423 |
Settlement and defense costs paid by insurance carriers | (15,603) | (23,138) |
Changes in estimated coverage | 0 | 13,660 |
Insurance receivable - asbestos, end of the year | $ 100,342 | $ 115,945 |