Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, Beginning Balance	$ 2,136	$ 2,012	$ 1,844
Additions for tax positions of prior years	36	6	414
Reductions for tax positions of prior years			(256)
Additions for tax positions of current year	46	121	19
Settlements	(303)
Translation adjustments	(5)	(3)	(9)
Unrecognized tax benefits, Ending Balance	$ 1,910	$ 2,136	$ 2,012