Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 986,693
Other comprehensive income (loss) before reclassifications	(17,559)	$ (40,374)
Amounts reclassified from AOCI	(2)	(2)
Net current-period other comprehensive income (loss)	(17,561)	(40,376)
Ending Balance	1,002,282
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(107,083)	(104,037)
Other comprehensive income (loss) before reclassifications	(18,433)	(41,182)
Net current-period other comprehensive income (loss)	(18,433)	(41,182)
Ending Balance	(125,516)	(145,219)
Defined Benefit Pension Plan Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(29,861)	(32,205)
Other comprehensive income (loss) before reclassifications	874	808
Net current-period other comprehensive income (loss)	874	808
Ending Balance	(28,987)	(31,397)
Cash Flow Hedge Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	63	72
Amounts reclassified from AOCI	(2)	(2)
Net current-period other comprehensive income (loss)	(2)	(2)
Ending Balance	61	70
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(136,881)	(136,170)
Ending Balance	$ (154,442)	$ (176,546)