- Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 25,511	$ 19,096
Gross increases for tax positions of prior years	1,237	6,586
Gross increases for tax positions of current year	3,969	2,522
Decreases due to settlements and other prior year tax positions	(5,629)	(2,550)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	752	0
Currency translation effect on foreign balances	42
Currency translation effect on foreign balances		(143)
Balance at December 31,	24,378	25,511
Reserves related to potential interest and penalties at December 31,	3,714	3,090
Unrecognized tax benefits at December 31,	$ 28,092	$ 28,601