Loans Receivable (Schedule Of Non-Covered Loans Outstanding) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Loans Receivable [Line Items]
Total non-covered loans receivable	$ 6,053,588	$ 4,452,585
Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	6,053,588	4,452,585
Residential Mortgage Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	283,113	369,986
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	266,970	355,164
Residential Mortgage Loans [Member] | Construction/ Owner Occupied [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	16,143	14,822
Commercial Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	4,487,509	3,123,096
Commercial Loans [Member] | Real Estate [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	2,591,013	1,781,744
Commercial Loans [Member] | Business [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	1,896,496	1,341,352
Consumer Loans [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	1,282,966	959,503
Consumer Loans [Member] | Indirect Automobile [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	261,896	255,322
Consumer Loans [Member] | Home Equity [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	826,463	555,749
Consumer Loans [Member] | Other Consumer [Member] | Non-Covered Loans [Member]
Loans Receivable [Line Items]
Total non-covered loans receivable	$ 194,607	$ 148,432