Summary of Significant Accounting Policies (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basis Of Presentation [Line Items]
Deposit pursuant to a payment network arrangement	$ 15,000,000
Individually impaired non-accrual loans	384,000,000	518,100,000
Non-accrual loans	416,300,000	543,333,000
Impaired loans, including accruing troubled debt restructuring	836,554,000	1,062,520,000
Accruing troubled debt restructuring	556,400,000	673,400,000	668,500,000
Loans, net	19,750,238,000	19,168,285,000
Minimum amount of loans included in quarterly reviews	500,000
Intangible assets, current carrying value	2,500,000
Maximum [Member]
Basis Of Presentation [Line Items]
Retail loans and commercial loans, evaluated for impairment	1,000,000
Cash And Cash Equivalents [Member]
Basis Of Presentation [Line Items]
Cash and cash equivalents	104,900,000	68,400,000
Total deposits	375,000	15,500,000
Interest earning deposits with banks	11,100,000	14,200,000
Federal funds sold	72,200,000	110,000,000
DRR Methodology [Member]
Basis Of Presentation [Line Items]
Loans, net	$ 2,600,000,000
Loans, net, percent	13.00%