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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 2) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivative instruments and hedging activities        
Liability position related to credit-risk-related contingent features $ 11,000,000   $ 11,000,000  
Termination value of derivatives with credit-risk-related contingent features 11,000,000   11,000,000  
Interest rate swaps | 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) (144,000) (2,488,000) 301,000 (4,012,000)
Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income (Effective Portion) $ 1,033,000 $ 1,042,000 $ 2,056,000 $ 2,072,000