Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Loss [Abstract]
Net unrealized loss on AFS securities, Before-Tax Amount	$ (1,254)	$ (1,646)
Net unrealized loss on AFS securities, Tax Effect	427	560
Net unrealized loss on AFS securities, Net-of-Tax Amount	(827)	(1,086)
Discount on AFS to HTM reclassification, Before-Tax Amount		(8)
Discount on AFS to HTM reclassification, Tax Effect		3
Discount on AFS to HTM reclassification, Net-of-Tax Amount		(5)
Unrealized actuarial losses-pension, Before-Tax Amount	(1,792)	(1,792)
Unrealized actuarial losses-pension, Tax Effect	609	609
Unrealized actuarial losses-pension, Net-of-Tax Amount	(1,183)	(1,183)
Total of all items above, Before-Tax Amount	(3,046)	(3,446)
Total of all items above, Tax Effect	1,036	1,172
Total of all items above, Net-of-Tax Effect	$ (2,010)	$ (2,274)