Income Taxes - Schedule of Reconciliation of Company's Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Reconciliation Deferred Tax Assets Valuation Allowance [Abstract]
Balance at the beginning of the period	$ 152,138	$ 151,339	$ 125,782
Charged to provision for income taxes	2,704	958	25,557
Foreign currency	(590)	(159)
Deductions	0	0	0
Balance at the end of the period	$ 154,252	$ 152,138	$ 151,339