Comprehensive Income (Accumulated Balances for Each Classification of Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ (5,720)
Transfer of securities from available-for-sale to held-to-maturity	0	(3,159)	8	(3,159)
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	127	129	351	129
Other comprehensive income (loss)	(351)	(269)	1,586	(8,117)
Balance	(4,134)		(4,134)
Unrealized Gains (Losses) on Securities [Member] | Available-For-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	1,436		(162)
Other comprehensive income before reclassifications	(589)		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 (loss)	(565)		1,033
Balance	871		871
Unrealized Gains (Losses) on Securities [Member] | Transferred From Available-For-Sale to Held-To-Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,064)		(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	127		351
Other comprehensive income (loss)	127		359
Balance	(2,937)		(2,937)
Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,748)		(1,790)
Reclassification adjustments for (gains) losses reclassified into income	21		63
Other comprehensive income (loss)	21		63
Balance	(1,727)		(1,727)
Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(407)		(472)
Other comprehensive income before reclassifications	66		131
Other comprehensive income (loss)	66		131
Balance	(341)		(341)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,783)		(5,720)
Other comprehensive income before reclassifications	(523)		1,241
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	127		351
Reclassification adjustments for (gains) losses reclassified into income	45		(6)
Other comprehensive income (loss)	(351)		1,586
Balance	$ (4,134)		$ (4,134)