Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (47,845)		$ (42,441)	$ (39,440)		$ (39,500)	$ (42,441)	$ (39,500)
Other comprehensive income (loss) before reclassifications		14,387			(14,690)			8,013	(14,095)
Income tax effect of other comprehensive income (loss) before reclassifications		143			(351)			910	(785)
Amounts reclassified from accumulated other comprehensive loss into net income		1,060			(424)			1,321	(553)
Income taxes reclassified into net income		(231)			91			(289)	119
Other comprehensive income (loss), net of tax		15,359	$ 7,086	(12,490)	(15,374)	$ 3,712	(3,652)	9,955	(15,314)
Ending Balance		(32,486)	(47,845)		(54,814)	(39,440)		(32,486)	(54,814)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(3,371)		(3,371)	(2,339)		(2,339)	(3,371)	(2,339)
Ending Balance		(3,371)	(3,371)		(2,339)	(2,339)		(3,371)	(2,339)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(42,758)		(39,965)	(37,928)		(37,157)	(39,965)	(37,157)
Other comprehensive income (loss) before reclassifications		14,172			(14,857)			11,396	(15,454)
Income tax effect of other comprehensive income (loss) before reclassifications		190			(315)			173	(489)
Other comprehensive income (loss), net of tax		14,362			(15,172)			11,569	(15,943)
Ending Balance		(28,396)	(42,758)		(53,100)	(37,928)		(28,396)	(53,100)
Foreign Currency Hedge Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(1,716)		$ 895	827		$ (4)	895	(4)
Other comprehensive income (loss) before reclassifications		215			167			(3,383)	1,359
Income tax effect of other comprehensive income (loss) before reclassifications		(47)			(36)			737	(296)
Amounts reclassified from accumulated other comprehensive loss into net income	[1]	1,060			(424)			1,321	(553)
Income taxes reclassified into net income		(231)			91			(289)	119
Other comprehensive income (loss), net of tax		997			(202)			(1,614)	629
Ending Balance		$ (719)	$ (1,716)		$ 625	$ 827		$ (719)	$ 625

[1] The amounts reclassified from accumulated other comprehensive loss were included in cost of sales.