Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, beginning balance	$ (10,499)	$ (1,895)	$ 4,025
Other comprehensive income before reclassifcations	(6,843)
Amounts reclassified from accumulated other comprehensive income	15,789
Period change, net of tax	8,946	(8,604)	(5,920)
Accumulated other comprehensive income, ending balance	(1,553)	(10,499)	(1,895)
Net Unrealized Gains on AFS Securities [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, beginning balance	9,709	13,143	11,936
Other comprehensive income before reclassifcations	(6,808)
Amounts reclassified from accumulated other comprehensive income	188
Period change, net of tax	(6,620)	(3,434)	1,207
Accumulated other comprehensive income, ending balance	3,089	9,709	13,143
Noncredit-related Impairment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, beginning balance	(1,937)	(2,062)	(2,150)
Other comprehensive income before reclassifcations	0
Amounts reclassified from accumulated other comprehensive income	2,049
Period change, net of tax	2,049	125	88
Accumulated other comprehensive income, ending balance	112	(1,937)	(2,062)
Net Unrealized Losses on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, beginning balance	(1,006)	(1,127)	(671)
Other comprehensive income before reclassifcations	(35)
Amounts reclassified from accumulated other comprehensive income	423
Period change, net of tax	388	121	(456)
Accumulated other comprehensive income, ending balance	(618)	(1,006)	(1,127)
Pension Benefit Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, beginning balance	(17,265)	(11,849)	(5,090)
Other comprehensive income before reclassifcations	0
Amounts reclassified from accumulated other comprehensive income	13,129
Period change, net of tax	13,129	(5,416)	(6,759)
Accumulated other comprehensive income, ending balance	$ (4,136)	$ (17,265)	$ (11,849)