Accumulated Other Comprehensive Income (Loss) (Accumulated Balances for Each Classification of Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (5,048)
Transfer of securities from available-for-sale to held-to-maturity	0	8
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	124	113
Other comprehensive income	995	885
Ending Balance	(4,053)
Unrealized Gains on Securities [Member] | Available-For-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,482	(162)
Other comprehensive income before reclassifications	783	792
Transfer of securities from available-for-sale to held-to-maturity		(8)
Reclassification adjustments for (gains) losses reclassified into income		(82)
Other comprehensive income	783	702
Ending Balance	2,265	540
Unrealized Gains on Securities [Member] | Transferred From Available-For-Sale to Held-To-Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(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	124	113
Other comprehensive income	124	121
Ending Balance	(2,700)	(3,175)
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(3,395)	(1,790)
Reclassification adjustments for (gains) losses reclassified into income	67	21
Other comprehensive income	67	21
Ending Balance	(3,328)	(1,769)
Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(311)	(472)
Other comprehensive income before reclassifications	21	41
Other comprehensive income	21	41
Ending Balance	(290)	(431)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,048)	(5,720)
Other comprehensive income before reclassifications	804	833
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	124	113
Reclassification adjustments for (gains) losses reclassified into income	67	(61)
Other comprehensive income	995	885
Ending Balance	$ (4,053)	$ (4,835)