DERIVATIVES - Additional Information (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 entity	Dec. 31, 2012 entity
Derivative [Line Items]
Maximum derivative notional position as a percentage of assets	35.00%
Maximum credit exposure as a percentage of capital	3.00%
Maximum single counterparty credit risk exposure	$ 20,000,000
Inerest-bearing deposit liability	916,011,000	935,493,000
Number of counterparties	9	8
Outstanding liability from counterparty contracts	13,600,000	26,000,000
Interest-bearing deposit swap	100,000,000	35,000,000
Credit Derivative Term 1	6 years
Fixed to floating interest rate swap [Member]
Derivative [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	300,000	200,000
Fair Value Hedges
Derivative [Line Items]
Inerest-bearing deposit liability	916,011,000	935,493,000
Accrued interest and other liabilities | Fair Value Hedges
Derivative [Line Items]
Inerest-bearing deposit liability	$ 563,200,000	$ 509,100,000