DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 2) (Interest rate swaps, USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative instruments and hedging activities
Liability position related to credit-risk-related contingent features	$ 10,100,000
Termination value of derivatives with credit-risk-related contingent features	10,100,000
Derivative in Cash Flow Hedging Relationships
Derivative instruments and hedging activities
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	(1,068,000)	(445,000)
Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income (Effective Portion)	$ 1,033,000	$ 1,023,000