Income Taxes - Summary of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Current – federal	$ 8,290	$ 8,265	$ 7,520
Current – state	729	499	66
Deferred – federal	(1,672)	(204)	(1,076)
Income tax expense	$ 7,347	$ 8,560	$ 6,510