Other Comprehensive Income (Components of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated other comprehensive gain (loss), beginning balance			$ (1,553)	$ (10,499)
Other Comprehensive Income Before Reclassifcations			2,399	(4,842)
Amounts reclassed from accumulated other comprehensive income			354	2,646
Net other comprehensive income (loss)	1,977	(3,377)	2,753	(2,196)
Accumulated other comprehensive gain (loss), ending balance	1,200	(12,695)	1,200	(12,695)
Net Unrealized Gains on AFS Securities [Member]
Accumulated other comprehensive gain (loss), beginning balance			3,089	9,711
Other Comprehensive Income Before Reclassifcations			2,429	(4,874)
Amounts reclassed from accumulated other comprehensive income			0	393
Net other comprehensive income (loss)			2,429	(4,481)
Accumulated other comprehensive gain (loss), ending balance	5,518	5,230	5,518	5,230
Noncredit-related Impairment [Member]
Accumulated other comprehensive gain (loss), beginning balance			112	(1,938)
Other Comprehensive Income Before Reclassifcations			0	0
Amounts reclassed from accumulated other comprehensive income			0	1,384
Net other comprehensive income (loss)			0	1,384
Accumulated other comprehensive gain (loss), ending balance	112	(554)	112	(554)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated other comprehensive gain (loss), beginning balance			(618)	(1,006)
Other Comprehensive Income Before Reclassifcations			(30)	32
Amounts reclassed from accumulated other comprehensive income			185	240
Net other comprehensive income (loss)			155	272
Accumulated other comprehensive gain (loss), ending balance	(463)	(734)	(463)	(734)
Pension Benefit Adjustment [Member]
Accumulated other comprehensive gain (loss), beginning balance			(4,136)	(17,266)
Other Comprehensive Income Before Reclassifcations			0	0
Amounts reclassed from accumulated other comprehensive income			169	629
Net other comprehensive income (loss)			169	629
Accumulated other comprehensive gain (loss), ending balance	$ (3,967)	$ (16,637)	$ (3,967)	$ (16,637)