Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 1,200	$ (100)	$ 200
State	(1,200)	9,400	500
Foreign	1,500	1,900	1,500
Gross	1,500	11,200	2,200
Deferred
Federal	800	2,900	5,000
State	(1,000)	(4,000)	2,200
Foreign	200	(1,900)	(1,500)
Gross		(3,000)	5,700
Total provision (benefit) for taxes	$ 1,506	$ 8,158	$ 7,877