Goodwill And Other Intangible Assets (Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 85,311	$ 98,966
Accumulated Amortization	(61,823)	(72,153)
Valuation Allowance	(2,670)	(1,163)
Other intangible assets, net	20,818	25,650
Loan Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	52,046	65,701
Accumulated Amortization	(39,146)	(53,210)
Valuation Allowance	(2,670)	(1,163)
Other intangible assets, net	10,230	11,328
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	27,144	27,144
Accumulated Amortization	(20,363)	(17,312)
Other intangible assets, net	6,781	9,832
Others [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	6,121	6,121
Accumulated Amortization	(2,314)	(1,631)
Other intangible assets, net	$ 3,807	$ 4,490