Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net current taxes:
U.S. Federal	$ 7,587	$ 1,221
U.S. State	2,750	388
Deferred taxes:
U.S. Federal	3,749	(171)
U.S. State	1,375	(61)
Income tax expense	$ 15,461	$ 1,377