Income Taxes - Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax provision:
Federal	$ 35,423	$ 30,306	$ 33,578
State	10,455	6,952	7,674
Total	45,878	37,258	41,252
Deferred income tax provision:
Federal	12,603	6,928	988
State	522	778	49
Total	13,125	7,706	1,037
Total income tax provision	$ 59,003	$ 44,964	$ 42,289

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

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