Subsequent Event (Details) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2013 D M
Visa settlement [Member]
Subsequent Event [Line Items]
Settlement cash payment all parties	$ 6,600,000,000
Settlement Cash Payment Visa Share	4,400,000,000
Settlement Basis Point Reduction Credit Card Interchange	0.10%
Number of months of interchange reduction		8
Number of Days Until Start of Reduction After Court Ordered Period		60
Percent Of Opt Out Merchants That Could Cause Agreement To Cancel	25.00%
Amount Visa Will Add to Litigation Escrow	150,000,000
Addition To Litigation Escrow Account	500,000
Loss Contingency, Estimate of Possible Loss		5,200,000
Loss Contingency Accrual, Carrying Value, Provision	5,700,000
Effect of subsequent event, basic	$ 0.04
Effect of subsequent event, diluted	$ 0.04
Shares of Visa Class B Stock Held	823,447
Conversion Rate of Class B to Class A Visa stock	43.00%
Other event [Member]
Subsequent Event [Line Items]
Estimated Reduction in Overdraft Income, Minimum		6,000,000
Estimated Reduction in Overdraft Income, Maximum		$ 8,000,000