Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Balance at January 1,	$ 2,806	$ 2,164	$ 1,553
Additions based on tax positions related to the current year	500	500	500
Additions for tax positions of prior years	213	142	113
Reductions for tax positions of prior years	(261)	0	0
Settlements	(714)	0	(2)
Balance at December 31,	$ 2,544	$ 2,806	$ 2,164