Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
U.S. Federal	$ 23,975	$ 11,744	$ 7,270
State	6,545	7,353	4,253
Foreign	1,733	1,616	1,731
Current income tax expense (benefit)	32,253	20,713	13,254
Deferred:
U.S. Federal	(755)	10,719	10,355
State	(1,424)	895	1,637
Foreign	(14)	(8)	43
Deferred income tax expense (benefit)	(2,193)	11,606	12,035
Total	$ 30,060	$ 32,319	$ 25,289