Loan Securitization (Carrying Values And Classification Of The Restricted Assets And Liabilities Relating To The Securitization Activities) (Details) (USD $) In Thousands	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2009
Cash collateral accounts	$ 10,500
Interest-bearing deposits with banks - restricted for securitization investors	37,165		36,620	47,780
Allowance for loan losses	(118,649)	(117,362)	(113,903)	(110,432)	(106,547)	(98,277)
Secured borrowings - owed to securitization investors	643,466		646,268	635,755
Secured borrowings-owed to securitization investors	600,000		600,000	600,000
Restricted Assets And Liabilities [Member]
Cash collateral accounts	1,759		1,759	1,759
Collections and interest funding accounts	35,406		34,861	46,021
Interest-bearing deposits with banks - restricted for securitization investors	37,165		36,620	47,780
Loans, net of unearned income - restricted for securitization investors	645,621		648,439	637,850
Allowance for loan losses	(2,155)		(2,171)	(2,095)
Secured borrowings - owed to securitization investors	643,466		646,268	635,755
Other assets	2,568		2,289	2,278
Total assets	683,199		685,177	685,813
Secured borrowings-owed to securitization investors	600,000		600,000	600,000
Other liabilities	4,490		4,458	4,442
Total liabilities	$ 604,490		$ 604,458	$ 604,442