Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allocation of Federal Income Taxes Between Current and Deferred [Abstract]
Current tax expense	$ 880	$ 525	$ 1,523
Deferred taxes	124	221	1,356
Provision for income taxes	$ 1,004	$ 746	$ 2,879