Finance Receivables And Allowance For Credit Losses (Schedule Of Composition Of Loans) (Details) (USD $) In Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2011		Dec. 31, 2010		Mar. 31, 2011	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009
Subtotal	$ 4,117,341		$ 3,743,451
Allowance for loan losses	(70,189)		(72,309)			(71,863)
Net loans	4,047,152		3,671,142			3,659,240
Direct finance leases	92,900		106,100
Commercial [Member]
Allowance for loan losses	(26,029)		(26,204)		(27,190)	(28,559)	(27,764)	(26,869)
Direct finance leases	1,269,607	[1]	1,211,399	[1]
Commercial Real Estate - Construction [Member]
Direct finance leases	98,670		101,016
Commercial Real Estate - Other [Member]
Direct finance leases	1,071,731		841,379
Residential Real Estate [Member]
Direct finance leases	795,442		664,705
Heloc [Member]
Direct finance leases	255,073		248,293
Auto [Member]
Direct finance leases	486,416		497,102
Other [Member]
Direct finance leases	$ 140,402		$ 179,557

[1] Includes direct finance leases of $92.9 million at June 30, 2011 and $106.1 million at December 31, 2010.