Loans and leases and the allowance for credit losses (Details 3) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Allowance for credit losses
Beginning balance		$ 894,667	$ 902,941	$ 878,022
Provision for credit losses	58,000	93,000	196,000	283,000
Consolidation of loan securitization trusts				2,752
Net charge-offs
Charge-offs	(66,496)	(101,782)	(221,240)	(313,167)
Recoveries	9,432	8,835	30,824	44,113
Net charge-offs	(57,064)	(92,947)	(190,416)	(269,054)
Ending balance	$ 908,525	$ 894,720	$ 908,525	$ 894,720