Accumulated Other Comprehensive Income (loss) (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Unrealized gains on available-for-sale securities
Federal income tax expense		$ (241)	$ (190)
NET INCOME		1,537	1,000
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Accumulated Net Unrealized Investment Gain (Loss)
Unrealized gains on available-for-sale securities
Investment securities available-for-sale gains, net	[1]	20	9
Federal income tax expense	[1]	(4)	(3)
NET INCOME	[1]	$ 16	$ 6

[1] Amounts in parentheses indicate debits to net income.