Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 27,181	$ 31,058	$ 44,868
Recognized into income	(710)	(1,655)	(1,362)
Current Increase (Decrease)	4,513	721	(10,156)
NOL and tax credit expiration	0	238	11
Translation adjustment	(1,090)	(3,181)	(2,303)
Ending balance	$ 29,894	$ 27,181	$ 31,058