Pension and Other Postretirement Benefits - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
---|---|---|
Defined Benefit Pension Plan [Member] | U.S. Defined Benefit Pension Plans [Member] | U.S. [Member] | ||
Accumulated other comprehensive loss: | ||
Net actuarial loss (gain) | $ 47,252 | $ 48,153 |
Prior service cost (credit) | 156 | 209 |
Total | 47,408 | 48,362 |
Defined Benefit Pension Plan [Member] | Foreign Pension Benefits [Member] | ||
Accumulated other comprehensive loss: | ||
Net actuarial loss (gain) | 25,914 | 25,547 |
Prior service cost (credit) | (9,174) | 0 |
Total | 16,740 | 25,547 |
Other Postretirement Benefit Plans [Member] | ||
Accumulated other comprehensive loss: | ||
Net actuarial loss (gain) | (1,211) | 936 |
Prior service cost (credit) | (13,809) | (15,581) |
Total | $ (15,020) | $ (14,645) |