Goodwill and Other Intangible Assets (Goodwill And Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Net	$ 12,378
Other Intangible Assets, Amortization	(4,781)	(4,816)	(4,948)
Community Banking [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross	873,542	777,409	765,316	765,113
Goodwill, Impaired, Accumulated Impairment Loss	(111,952)	(111,952)	(111,952)	(111,952)
Goodwill, Total	761,590	665,457	653,364	653,161
Goodwill, Net additions	96,777	12,545	247
Goodwill, Reductions	(644)	(452)	(44)
Wealth Management [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross	3,697	3,697	3,697	3,697
Goodwill, Impaired, Accumulated Impairment Loss	(982)	(982)	(982)	(982)
Goodwill, Total	2,715	2,715	2,715	2,715
Other Intagible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Gross	58,909	58,909	58,079	58,079
Other Intangible Assets, Accumulated Amortization	(46,531)	(41,750)	(36,934)	(31,986)
Other Intangible Assets, Net	12,378	17,159	21,145	26,093
Other Intangible Assets, Net additions	0	830	0
Other Intangible Assets, Amortization	$ (4,781)	$ (4,816)	$ (4,948)