Accumulated Other Comprehensive Income (Loss) (Accumulated Balances for Each Classification of Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (5,048)
Transfer of securities from available-for-sale to held-to-maturity				$ 8
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	$ 144	$ 127	396	351
Other comprehensive income	1,499	(351)	1,624	1,586
Ending Balance	(3,424)		(3,424)
Losses on Securities [Member] | Available-For-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,200	1,436	1,482	(162)
Other comprehensive income before reclassifications	1,215	(589)	933	1,110
Transfer of securities from available-for-sale to held-to-maturity				(8)
Reclassification adjustments for (gains) losses reclassified into income		24		(69)
Other comprehensive income	1,215	(565)	933	1,033
Ending Balance	2,415	871	2,415	871
Losses on Securities [Member] | Transferred From Available-For-Sale to Held-To-Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,572)	(3,064)	(2,824)	(3,296)
Transfer of securities from available-for-sale to held-to-maturity				8
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	144	127	396	351
Other comprehensive income	144	127	396	359
Ending Balance	(2,428)	(2,937)	(2,428)	(2,937)
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(3,261)	(1,748)	(3,395)	(1,790)
Reclassification adjustments for (gains) losses reclassified into income	67	21	201	63
Other comprehensive income	67	21	201	63
Ending Balance	(3,194)	(1,727)	(3,194)	(1,727)
Interst Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(290)	(407)	(311)	(472)
Other comprehensive income before reclassifications	73	66	94	131
Other comprehensive income	73	66	94	131
Ending Balance	(217)	(341)	(217)	(341)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(4,923)	(3,783)	(5,048)	(5,720)
Other comprehensive income before reclassifications	1,288	(523)	1,027	1,241
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	144	127	396	351
Reclassification adjustments for (gains) losses reclassified into income	67	45	201	(6)
Other comprehensive income	1,499	(351)	1,624	1,586
Ending Balance	$ (3,424)	$ (4,134)	$ (3,424)	$ (4,134)