Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allocation of Federal Income Taxes Between Current and Deferred [Abstract]
Current tax expense	$ 1,554	$ 880	$ 525
Deferred taxes	(487)	124	221
Provision for income taxes	$ 1,067	$ 1,004	$ 746