Other Comprehensive Income (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Securities Available For Sale, Beginning balance			$ 601	$ 504
Securities Available For Sale, Other comprehensive income (loss) before reclassifications			(3,499)	2,703
Securities Available For Sale, Amounts reclassified from accumulated other comprehensive income	$ 0	$ (173)	0	(173)
Securities Available For Sale, Net other comprehensive income (loss) during period			(3,499)	2,530
Securities Available For Sale, Reclassification adjustment upon adoption of ASU 2018-02			129
Securities Available For Sale, Ending balance	(2,769)	3,034	(2,769)	3,034
Post-retirement Benefit, Beginning balance			(384)	(289)
Post-retirement Benefit, Other comprehensive income before reclassifications			0	0
Post-retirement Benefit, Amounts reclassified from accumulated other comprehensive income				0
Post-retirement Benefit, Net other comprehensive income during period			0	0
Post-retirement Benefit, Reclassification adjustment upon adoption of ASU 2018-02			(82)
Post-retirement Benefit, Ending balance	(466)	(289)	(466)	(289)
Accumulated Other Comprehensive Income (Loss), Beginning balance			217	215
Accumulated Other Comprehensive Income (Loss), Other comprehensive (loss) before reclassifications			(3,499)	2,703
Accumulated Other Comprehensive Income (Loss), Amounts reclassified from accumulated other comprehensive income				(173)
Accumulated Other Comprehensive Income (Loss), Net other comprehensive income (loss) during period			(3,499)	2,530
Accumulated Other Comprehensive Income (Loss), Reclassification adjustment upon adoption of ASU 2018-02			47
Accumulated Other Comprehensive Income (Loss), Ending balance	$ (3,235)	$ 2,745	$ (3,235)	$ 2,745