Income Taxes - Summary of Income Tax Expense Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 21,688	$ 20,954	$ 9,078
State	4,471	1,932	0
Deferred
Federal	(2,697)	2,808	7,018
State	(644)	4,179	4,163
Total income tax provision	$ 22,818	$ 29,873	$ 20,259