Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees, Other Commitments (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Aug. 31, 2008
Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees [Abstract]
Membership interest in U.S Bank New Markets Tax Credit Fund (in thousandths)		99.90%
Equity contributions to be made to the Fund	$ 283,600,000
Net tax benefits to be received from the Fund	301,900,000
Difference between equity contributions and total benefits received will be recognized over the life of the Fund as net tax benefits	18,300,000
Future equity contributions to the NMTC Fund [Abstract]
Three months ending Dec. 31, 2013	12,071,000
Year ending Dec. 31, 2014	47,434,000
Year ending Dec. 31, 2015	11,195,000
Year ending Dec. 31, 2016	3,698,000
Year ending Dec. 31, 2017	2,914,000
Total	77,312,000
Total future equity contributions	77,312,000
Future equity contributions due within the next 12 months	48,300,000
Tax benefits in excess of capital contributions	83,400,000
Tax benefits not utilized	112,300,000
Equity contributions with an imputed interest rate [Abstract]
Equity contributions - imputed interst rate (in hundredths)	6.00%
Principal payment schedule above:	77,312,000
Less: unamortized discount	5,015,000
Total	$ 72,297,000
Period of recognition of gross investment amortization expense (in years)	10 years
Remaining period of recognition of gross investment amortization expense (in years)	4 years