Stockholders Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 311,877
Balance at end of period	324,836
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(169,575)	$ (172,843)
Other comprehensive income (loss)	545	(10,118)
Balance at end of period	(169,030)	(182,961)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(80,704)	(78,257)
Other comprehensive income (loss)	1,151	1,043
Balance at end of period	(79,553)	(77,214)
Accumulated Defined Benefit Plans Adjustment | OPEB
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(910)	(590)
Other comprehensive income (loss)	(71)	(80)
Balance at end of period	(981)	(670)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(251,189)	(251,690)
Other comprehensive income (loss)	1,625	(9,155)
Balance at end of period	$ (249,564)	$ (260,845)