Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 33,495	$ 14,850	$ 13,486
State	8,918	4,127	3,641
Current income tax expense (benefit)	42,413	18,977	17,127
Deferred:
Federal	(7,177)	4,585	221
State	(1,298)	884	90
Deferred income tax expense (benefit)	(8,475)	5,469	311
Total tax expense	$ 33,938	$ 24,446	$ 17,438

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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