Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 304,506
Balance at end of period	295,074
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(172,843)	$ (172,434)
Other comprehensive income (loss)	(10,118)	(25)
Balance at end of period	(182,961)	(172,459)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(78,257)	(75,286)
Other comprehensive income (loss)	1,043	828
Balance at end of period	(77,214)	(74,458)
Accumulated Defined Benefit Plans Adjustment | OPEB
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(590)	(550)
Other comprehensive income (loss)	(80)	(70)
Balance at end of period	(670)	(620)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(251,690)	(248,270)
Other comprehensive income (loss)	(9,155)	733
Balance at end of period	$ (260,845)	$ (247,537)