Goodwill and Intangible Assets - Schedule of Changes in Intangible Assets, Net of Accumulated Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-lived Intangible Assets [Roll Forward]
Net balance at January 1	$ 109,500
Additions	11,100	$ 0
Amortization expense	(11,119)	(10,509)
Currency translation	1,830	(3,064)
Net balance at December 31	111,300	109,500
Intangible assets, net (Note 12)	$ 171,326	$ 169,515	$ 183,088