Loans Receivable (Schedule Of Non-Covered Loans Outstanding) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Loans Receivable [Line Items]
Total non-covered loans receivable	$ 6,217,644	$ 6,053,588
Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	6,217,644	6,053,588
Residential Mortgage Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	263,003	283,113
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	247,775	266,970
Residential Mortgage Loans [Member] | Construction/ Owner Occupied [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	15,228	16,143
Commercial Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	4,601,237	4,487,509
Commercial Loans [Member] | Real Estate [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	2,580,727	2,591,013
Commercial Loans [Member] | Business [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	2,020,510	1,896,496
Consumer Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	1,353,404	1,282,966
Consumer Loans [Member] | Indirect Automobile [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	288,064	261,896
Consumer Loans [Member] | Home Equity [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	871,489	826,463
Consumer Loans [Member] | Consumer - Other [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	$ 193,851	$ 194,607