Accumulated Other Comprehensive Loss (Components of AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (25,268)		$ (82,106)
Other comprehensive income before reclassifications	7,697		(418)
Amounts reclassified from accumulated other comprehensive loss	977	[1]	2,619	[1]
Net current period other comprehensive income	8,674		2,201
Ending balance	(16,594)		(79,905)
Unrealized Loss on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(4,434)	[2]	(6,292)	[2]
Other comprehensive income before reclassifications	441	[2]	493	[2]
Amounts reclassified from accumulated other comprehensive loss	0	[2]	0	[2]
Net current period other comprehensive income	441	[2]	493	[2]
Ending balance	(3,993)	[2]	(5,799)	[2]
Unrealized Gains on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(10,091)	[2]	20,517	[2]
Other comprehensive income before reclassifications	7,256	[2]	(911)	[2]
Amounts reclassified from accumulated other comprehensive loss	0	[2]	0	[2]
Net current period other comprehensive income	7,256	[2]	(911)	[2]
Ending balance	(2,835)	[2]	19,606	[2]
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(10,743)	[2]	(96,331)	[2]
Other comprehensive income before reclassifications	0	[2]	0	[2]
Amounts reclassified from accumulated other comprehensive loss	977	[1],[2]	2,619	[1],[2]
Net current period other comprehensive income	977	[2]	2,619	[2]
Ending balance	$ (9,766)	[2]	$ (93,712)	[2]

[1] Amounts in parentheses indicate debits to profit/loss.

[2] All amounts are net of tax. Amounts in parentheses indicate debits.