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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Changes in each component of accumulated other comprehensive income, net of tax    
Balance at the beginning of the period $ (830)  
Other comprehensive income (loss) before reclassifications (4,823)  
Amounts reclassified from AOCI 11,618  
Other comprehensive income (loss), net of tax 6,795 (3,463)
Balance at the end of the period 5,965  
Net Unrealized Gain on Investment Securities
    
Changes in each component of accumulated other comprehensive income, net of tax    
Balance at the beginning of the period 22,740  
Other comprehensive income (loss) before reclassifications (4,823)  
Other comprehensive income (loss), net of tax (4,823)  
Balance at the end of the period 17,917  
Net Unrealized Loss on Derivatives
    
Changes in each component of accumulated other comprehensive income, net of tax    
Balance at the beginning of the period (10,993)  
Amounts reclassified from AOCI 10,993  
Other comprehensive income (loss), net of tax 10,993  
Defined Benefit Plans
    
Changes in each component of accumulated other comprehensive income, net of tax    
Balance at the beginning of the period (12,577)  
Amounts reclassified from AOCI 625  
Other comprehensive income (loss), net of tax 625  
Balance at the end of the period $ (11,952)