Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 5,444	$ 1,903	$ 1,096
Additions for tax positions of prior years	755	2,937	0
Additions for tax positions of current year	0	684	650
Reductions for tax positions of prior years	(2,507)	0	0
Effect of foreign currency adjustments		(80)
Effect of foreign currency adjustments	33		157
Ending balance	$ 3,725	$ 5,444	$ 1,903