Other Comprehensive Income (Components of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated other comprehensive income (loss), beginning balance	$ (8,809)	$ (1,553)
Other Comprehensive Income Before Reclassifcations	656	596
Amounts reclassed from accumulated other comprehensive income	328	180
Total other comprehensive income, net of tax	984	776
Accumulated other comprehensive income (loss), ending balance	(7,825)	(777)
Net Unrealized Gains on AFS Securities [Member]
Accumulated other comprehensive income (loss), beginning balance	4,110	3,089
Other Comprehensive Income Before Reclassifcations	664	612
Amounts reclassed from accumulated other comprehensive income	0	0
Total other comprehensive income, net of tax	664	612
Accumulated other comprehensive income (loss), ending balance	4,774	3,701
Noncredit-related Impairment [Member]
Accumulated other comprehensive income (loss), beginning balance	112	112
Other Comprehensive Income Before Reclassifcations	0	0
Amounts reclassed from accumulated other comprehensive income	0	0
Total other comprehensive income, net of tax	0	0
Accumulated other comprehensive income (loss), ending balance	112	112
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive income (loss), beginning balance	(287)	(618)
Other Comprehensive Income Before Reclassifcations	(8)	(16)
Amounts reclassed from accumulated other comprehensive income	93	92
Total other comprehensive income, net of tax	85	76
Accumulated other comprehensive income (loss), ending balance	(202)	(542)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive income (loss), beginning balance	(12,744)	(4,136)
Other Comprehensive Income Before Reclassifcations	0	0
Amounts reclassed from accumulated other comprehensive income	235	88
Total other comprehensive income, net of tax	235	88
Accumulated other comprehensive income (loss), ending balance	$ (12,509)	$ (4,048)