LOANS (excluding covered loans) - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Non Covered Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write down of other real estate owned	$ 3,341,000	$ 727,000
Non Covered Loans | Commercial | Commercial Real Estate Developer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Write down of other real estate owned	3,100,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum loans reviewed to determine if a specific allowance is necessary	250,000
Commercial | Franchise Operations | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan terms for franchisees, principally quick service and casual dining restaurants	84
Commercial | 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]
Write down of other real estate owned	$ 3,518,000	$ 899,000