Goodwill and Intangible Assets - Schedule of Changes in Intangible Assets, Net of Accumulated Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-lived Intangible Assets [Roll Forward]
Net balance at January 1	$ 31,323	$ 35,029
Additions	67,645	500
Amortization expense	(4,811)	(2,979)
Impairment losses	(723)	0	$ 0
Currency translation	(3,366)	(1,227)
Net balance at December 31	$ 90,068	$ 31,323	$ 35,029