Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (68,493)	$ (93,217)	$ (58,653)	$ (77,896)
Other comprehensive income (loss) before reclassifications (net of tax)	3,505	6,407	(6,414)	(7,213)
Amounts reclassified from accumulated other comprehensive income (net of tax)	175	(1,167)	254	(2,868)
Net current period other comprehensive income (loss)	3,680	5,240	(6,160)	(10,081)
Ending Balance	(64,813)	(87,977)	(64,813)	(87,977)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(55,718)	(90,249)	(42,525)	(76,346)
Other comprehensive income (loss) before reclassifications (net of tax)	3,846	5,891	(9,347)	(8,012)
Net current period other comprehensive income (loss)	3,846	5,891	(9,347)	(8,012)
Ending Balance	(51,872)	(84,358)	(51,872)	(84,358)
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	765	2,999	(2,496)	4,316
Other comprehensive income (loss) before reclassifications (net of tax)	(341)	516	2,933	799
Amounts reclassified from accumulated other comprehensive income (net of tax)	25	(1,068)	12	(2,668)
Net current period other comprehensive income (loss)	(316)	(552)	2,945	(1,869)
Ending Balance	449	2,447	449	2,447
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(12,706)	(7,105)	(12,844)	(7,253)
Amounts reclassified from accumulated other comprehensive income (net of tax)	197	149	335	297
Net current period other comprehensive income (loss)	197	149	335	297
Ending Balance	(12,509)	(6,956)	(12,509)	(6,956)
Change in Other Postretirement Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(834)	1,138	(788)	1,387
Amounts reclassified from accumulated other comprehensive income (net of tax)	(47)	(248)	(93)	(497)
Net current period other comprehensive income (loss)	(47)	(248)	(93)	(497)
Ending Balance	$ (881)	$ 890	$ (881)	$ 890