Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Beginning balance	$ (17,369)	$ (17,973)	$ (20,233)	$ (24,213)
Other comprehensive income/(loss) before reclassifications	(20)	544	2,110	3,989
Amounts reclassified from accumulated other comprehensive income	138	60	150	(9)
Ending balance	(17,251)	(17,369)	(17,973)	(20,233)
Investment securities- with OTTI [Member]
Beginning balance	(863)	(2,109)	(3,679)	(7,623)
Other comprehensive income/(loss) before reclassifications	997	1,350	1,670	4,349
Amounts reclassified from accumulated other comprehensive income	(84)	(104)	(100)	(405)
Ending balance	50	(863)	(2,109)	(3,679)
Investment Securities -All Other AFS [Member]
Beginning balance	(1,888)	(1,876)	(2,555)	(11,292)
Other comprehensive income/(loss) before reclassifications	700	36	621	8,712
Amounts reclassified from accumulated other comprehensive income	27	(48)	58	25
Ending balance	(1,161)	(1,888)	(1,876)	(2,555)
Investment Securities HTM [Member]
Beginning balance	(2,094)	(2,185)	(2,255)	0
Other comprehensive income/(loss) before reclassifications	0	0	0	(2,395)
Amounts reclassified from accumulated other comprehensive income	64	91	70	140
Ending balance	(2,030)	(2,094)	(2,185)	(2,255)
Cash Flow Hedge (OCI) [Member]
Beginning balance	(84)	(98)	(119)	(274)
Other comprehensive income/(loss) before reclassifications	20	14	21	155
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Ending balance	(64)	(84)	(98)	(119)
Pension Plan [Member]
Beginning balance	(12,228)	(11,482)	(11,392)	(5,088)
Other comprehensive income/(loss) before reclassifications	(1,737)	(856)	(202)	(6,513)
Amounts reclassified from accumulated other comprehensive income	121	110	112	209
Ending balance	(13,844)	(12,228)	(11,482)	(11,392)
SERP [Member]
Beginning balance	(212)	(223)	(233)	64
Other comprehensive income/(loss) before reclassifications	0	0	0	(319)
Amounts reclassified from accumulated other comprehensive income	10	11	10	22
Ending balance	$ (202)	$ (212)	$ (223)	$ (233)