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Fair Values (Schedule Of Reconciliation Of Assets And Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) On A Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Fair Values [Abstract]    
Mortgage servicing rights, Beginning Balance $ 14,454 $ 12,625
Mortgage servicing rights, Change included in earnings (2,990) (3,878)
Mortgage servicing rights, Purchases and issuances 6,720 5,707
Mortgage servicing rights, Ending Balance 18,184 14,454
Mortgage servicing rights, Net change in unrealized gains or (losses) relating to items held at end of period (961) (1,965)
Junior subordinated debentures, Beginning Balance 80,688 85,666
Junior subordinated debentures, Change included in earnings 6,134 (1,004)
Junior subordinated debentures, Sales and settlements (3,917) (3,974)
Junior subordinated debentures, Ending Balance 82,905 80,688
Junior subordinated debentures, Net change in unrealized gains or losses relating to items held at end of period $ 6,134 $ (1,004)