Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated and Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 529,745
Ending balance	50,790	$ 529,745
Foreign Currency Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(37,434)	(50,056)	$ (35,610)
Other comprehensive income (loss) before reclassifications, net of income tax	6,170	5,725	(14,446)
Amounts reclassified from accumulated other comprehensive loss to the consolidated statement of operations and comprehensive income, net of income tax		6,897
Net current-period other comprehensive income (loss)	6,170	12,622	(14,446)
Ending balance	(31,264)	(37,434)	(50,056)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1,700	855	(208)
Other comprehensive income (loss) before reclassifications, net of income tax	(495)	106	1,432
Amounts reclassified from accumulated other comprehensive loss to the consolidated statement of operations and comprehensive income, net of income tax	143	739	(369)
Net current-period other comprehensive income (loss)	(352)	845	1,063
Ending balance	1,348	1,700	855
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(35,734)	(49,201)	(35,818)
Other comprehensive income (loss) before reclassifications, net of income tax	5,675	5,831	(13,014)
Amounts reclassified from accumulated other comprehensive loss to the consolidated statement of operations and comprehensive income, net of income tax	143	7,636	(369)
Net current-period other comprehensive income (loss)	5,818	13,467	(13,383)
Ending balance	$ (29,916)	$ (35,734)	$ (49,201)