Income Taxes, Current and Deferred Federal Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allocation of Federal Income Taxes Between Current and Deferred [Abstract]
Current tax expense	$ 525	$ 1,523	$ 708
Deferred tax expense	221	1,356	229
Provision for income taxes	$ 746	$ 2,879	$ 937