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Derivatives and Hedging Activities (Details 4) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]        
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax $ (929) $ (4,110) $ (2,125) $ (6,518)
DERIVATIVES DESIGNATED AS HEDGES: [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax (929) (4,110) (2,125) (6,518)
Effect of derivative financial instruments included in OCI and current earnings        
Gain/(Loss) Reclassified from OCI into Income (Effective Portion): (1,370) (1,467) (4,008) (4,065)
Loss Recognized in Income on Derivative (Ineffective Portion & Amount Excluded from Effectiveness Testing):            
DERIVATIVES NOT DESIGNATED AS HEDGES: [Member]
       
Effect of derivative financial instruments included in OCI and current earnings        
Changes in Fair Value of Customer Related Positions: 8 52 62 105
Other Income [Member] | DERIVATIVES NOT DESIGNATED AS HEDGES: [Member]
       
Effect of derivative financial instruments included in OCI and current earnings        
Changes in Fair Value of Customer Related Positions: 12 52 85 122
Interest Expense [Member] | DERIVATIVES DESIGNATED AS HEDGES: [Member]
       
Effect of derivative financial instruments included in OCI and current earnings        
Loss Recognized in Income on Derivative (Ineffective Portion & Amount Excluded from Effectiveness Testing):            
Other Expense [Member] | DERIVATIVES DESIGNATED AS HEDGES: [Member]
       
Effect of derivative financial instruments included in OCI and current earnings        
Loss Recognized in Income on Derivative (Ineffective Portion & Amount Excluded from Effectiveness Testing):            
Other Expense [Member] | DERIVATIVES NOT DESIGNATED AS HEDGES: [Member]
       
Effect of derivative financial instruments included in OCI and current earnings        
Changes in Fair Value of Customer Related Positions: $ (4)    $ (23) $ (17)