Income Taxes - Summary of Income Tax Expense Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ 20,954	$ 9,078	$ 667
State	1,932	0	2
Deferred
Federal	2,808	7,018	32,791
State	4,179	4,163	2,876
Total income tax provision	$ 29,873	$ 20,259	$ 36,336