Finance Receivables And Allowance For Credit Losses (Schedule Of Composition Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 4,767,203		$ 3,743,451
Allowance for loan losses	(57,117)		(72,309)
Allowance for loan losses - covered loans	(943)		0
Net loans	4,709,143		3,671,142
Direct finance leases	79,600		106,100
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,341,409		1,211,399
Direct finance leases	1,216,654	[1]	1,211,399	[1]
Commercial Real Estate - Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	46,141		101,016
Commercial Real Estate - Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	1,021,229		841,379
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	995,458		664,705
Heloc [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	235,603		248,293
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	483,575		497,102
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	142,183		179,557
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Direct finance leases	$ 626,360		$ 0

[1] Includes direct finance leases of $79.6 million and $106.1 million at December 31, 2011 and 2010, respectively.