Income Taxes - Summary of Components of Tax (Provision) Benefit (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal				$ (2,797)
State		$ (260)	$ 519	(1,078)
Deferred
Federal		7,702	(489)	5,270
State		2,632	(371)	(1,464)
Net (provision) benefit for income taxes	$ (709)	$ 10,074	$ (341)	$ (69)