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, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (93,217)	$ (139,535)	$ (77,896)	$ (137,440)
Other comprehensive income (loss) before reclassifications (net of tax)	6,407	7,392	(7,213)	5,228
Amounts reclassified from accumulated other comprehensive income (net of tax)	(1,167)	(1,593)	(2,868)	(1,524)
Net current period other comprehensive income (loss)	5,240	5,799	(10,081)	3,704
Ending Balance	(87,977)	(133,736)	(87,977)	(133,736)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(90,249)	(74,427)	(76,346)	(69,622)
Other comprehensive income (loss) before reclassifications (net of tax)	5,891	1,426	(8,012)	(3,379)
Net current period other comprehensive income (loss)	5,891	1,426	(8,012)	(3,379)
Ending Balance	(84,358)	(73,001)	(84,358)	(73,001)
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2,999	4,421	4,316	2,199
Other comprehensive income (loss) before reclassifications (net of tax)	516	1,040	799	3,681
Amounts reclassified from accumulated other comprehensive income (net of tax)	(1,068)	(1,019)	(2,668)	(1,438)
Net current period other comprehensive income (loss)	(552)	21	(1,869)	2,243
Ending Balance	2,447	4,442	2,447	4,442
Change in Pensions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,105)	(70,810)	(7,253)	(71,431)
Other comprehensive income (loss) before reclassifications (net of tax)		4,926		4,926
Amounts reclassified from accumulated other comprehensive income (net of tax)	149	(441)	297	180
Net current period other comprehensive income (loss)	149	4,485	297	5,106
Ending Balance	(6,956)	(66,325)	(6,956)	(66,325)
Change in Other Postretirement Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,138	1,281	1,387	1,414
Amounts reclassified from accumulated other comprehensive income (net of tax)	(248)	(133)	(497)	(266)
Net current period other comprehensive income (loss)	(248)	(133)	(497)	(266)
Ending Balance	$ 890	$ 1,148	$ 890	$ 1,148