Summary of Significant Accounting Policies - Schedule of Components of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ (382)
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	128	$ 248	$ (279)
Currency translation adjustment	(3,907)	(4,133)	(1,708)
Ending Balance	(6,232)	(382)
Unrealized loss on debt securities (net of tax benefit)	(2,071)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(482)	3,651
Currency translation adjustment	(3,907)	(4,133)
Ending Balance	(4,389)	(482)	3,651
Change in Fair Value [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	100	(148)
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	128	248
Ending Balance	(1,843)	100	(148)
Unrealized loss on debt securities (net of tax benefit)	(2,071)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(382)	3,503
Unrealized gain (loss) on derivative instrument net of tax expense/benefit	128	248	(279)
Currency translation adjustment	(3,907)	(4,133)	(1,708)
Ending Balance	(6,232)	$ (382)	$ 3,503
Unrealized loss on debt securities (net of tax benefit)	$ (2,071)