Other Noninterest Income and Other Noninterest Expense (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	$ 193,388,000	$ 179,811,000	$ 204,936,000
Acquired Loans
Other Operating Cost and Expense [Line Items]
Proceeds from Recoveries of Loans Previously Charged off	29,700,000	10,500,000	13,500,000
Telecommunication
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	10,033,000	11,131,000	12,131,000
Cardholder Reward Programs
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	10,154,000	4,325,000	11,780,000
Processing Fees Paid To Third Parties
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	15,095,000	14,454,000	16,336,000
Cardholder Processing
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	9,892,000	11,816,000	11,418,000
Merchant Processing
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	35,279,000	33,313,000	37,196,000
Collection
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	21,209,000	25,591,000	23,237,000
Consultant
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	9,740,000	3,915,000	3,021,000
Advertising
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	8,286,000	3,897,000	7,957,000
Other Expense
Other Operating Cost and Expense [Line Items]
Other Noninterest Expense	$ 73,700,000	$ 71,369,000	$ 81,860,000