COMMITMENTS AND CONTINGENCIES (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Credit Extensions
Allowance for unfunded loan commitments, off-balance sheet credit exposures and recourse provision	$ 9,400,000	$ 11,000,000
Undisbursed Loan Commitments
Credit Extensions
Loan	2,610,000,000	2,190,000,000
Mortgage and commercial loan applications in process
Credit Extensions
Loan	410,200,000	305,600,000
Commercial and Standby Letters of Credit
Credit Extensions
Commercial and standby letters of credit issued	$ 2,160,000,000	$ 1,640,000,000