LOANS (excluding covered loans) - Additional Information (Detail) (Commercial, USD $)	3 Months Ended
	Mar. 31, 2012
Franchise Operations | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan terms for franchisees, principally quick service and casual dining restaurants	84
Franchise Operations | Leasehold Improvements
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan terms for franchisees, principally quick service and casual dining restaurants	180
Non Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum loans reviewed to determine if a specific allowance is necessary	$ 250,000