Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Foreign currency translation adjustments		$ (7,267)	$ (2,634)
Gain (loss) on investments, net of taxes (1)	[1]	276	(1,538)
Loss on cash flow hedges (1)	[1]	0	(246)
Actuarial loss		(279)	0
Total accumulated other comprehensive loss		$ (7,270)	$ (4,418)

[1] See Consolidated Statements of Comprehensive Loss for the amounts related to cash flow hedges and investments that were reclassified into the Consolidated Statements of Operations for the periods presented.