Income Taxes - Summary of Income Tax Provision/(Benefit) Relating to Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current provision/(benefit):
Domestic	$ 7,107	$ 9,951	$ (1,069)
Foreign	18,428	12,022	6,186
Total	25,535	21,973	5,117
Deferred provision/(benefit):
Domestic	(2,506)	3,041	535
Foreign	(878)	(803)	(459)
Total	(3,384)	2,238	76
Income tax expense	$ 22,151	$ 24,211	$ 5,193