Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Beginning balance	$ (21,465)	$ (18,944)
Other comprehensive income/(loss) before reclassifications	257	(3,441)
Amounts reclassified from accumulated other comprehensive income	248	920
Ending balance	(20,960)	(21,465)
Investment securities- with OTTI [Member]
Beginning balance	(2,368)	(1,942)
Other comprehensive income/(loss) before reclassifications	100	(421)
Amounts reclassified from accumulated other comprehensive income	(2)	(5)
Ending balance	(2,270)	(2,368)
Investment Securities -All Other AFS [Member]
Beginning balance	(3,218)	(2,024)
Other comprehensive income/(loss) before reclassifications	73	(929)
Amounts reclassified from accumulated other comprehensive income	5	(265)
Ending balance	(3,140)	(3,218)
Investment Securities HTM [Member]
Beginning balance	(1,354)	(1,971)
Other comprehensive income/(loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	61	617
Ending balance	(1,293)	(1,354)
Cash Flow Hedge (OCI) [Member]
Beginning balance	422	(39)
Other comprehensive income/(loss) before reclassifications	52	461
Amounts reclassified from accumulated other comprehensive income	0	0
Ending balance	474	422
Pension Plan [Member]
Beginning balance	(14,232)	(12,663)
Other comprehensive income/(loss) before reclassifications	32	(2,086)
Amounts reclassified from accumulated other comprehensive income	162	517
Ending balance	(14,038)	(14,232)
SERP [Member]
Beginning balance	(715)	(305)
Other comprehensive income/(loss) before reclassifications	0	(466)
Amounts reclassified from accumulated other comprehensive income	22	56
Ending balance	$ (693)	$ (715)