Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Beginning balance		$ (21,465)
Balance		113,698	$ 120,771
Ending balance	$ (19,402)		(21,465)
Balance	118,561		113,698
Investment securities- with OTTI [Member]
Balance	(2,270)	(2,368)	(1,942)
Other comprehensive income/(loss) before reclassifications	(32)	100	(421)
Amounts reclassified from accumulated other comprehensive income	(34)	(2)	(5)
Balance	(2,336)	(2,270)	(2,368)
Investment Securities -All Other AFS [Member]
Balance	(3,140)	(3,218)	(2,024)
Other comprehensive income/(loss) before reclassifications	1,698	73	(929)
Amounts reclassified from accumulated other comprehensive income	10	5	(265)
Balance	(1,432)	(3,140)	(3,218)
Investment Securities HTM [Member]
Balance	(1,293)	(1,354)	(1,971)
Other comprehensive income/(loss) before reclassifications	0	0	0
Amounts reclassified from accumulated other comprehensive income	43	61	617
Balance	(1,250)	(1,293)	(1,354)
Cash Flow Hedge (OCI) [Member]
Balance	474	422	(39)
Other comprehensive income/(loss) before reclassifications	(150)	52	461
Amounts reclassified from accumulated other comprehensive income	0	0	0
Balance	324	474	422
Pension Plan [Member]
Balance	(14,038)	(14,232)	(12,663)
Other comprehensive income/(loss) before reclassifications	(158)	32	(2,086)
Amounts reclassified from accumulated other comprehensive income	160	162	517
Balance	(14,036)	(14,038)	(14,232)
SERP [Member]
Balance	(693)	(715)	(305)
Other comprehensive income/(loss) before reclassifications	0	0	(466)
Amounts reclassified from accumulated other comprehensive income	21	22	56
Balance	(672)	(693)	(715)
Accumulated Other Comprehensive Loss [Member]
Balance	(20,960)	(21,465)	(18,944)
Other comprehensive income/(loss) before reclassifications	1,358	257	(3,441)
Amounts reclassified from accumulated other comprehensive income	200	248	920
Balance	$ (19,402)	$ (20,960)	$ (21,465)