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Derivative Financial Instruments (Details 2) (Cash Flow Hedges, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Derivatives Designated as Cash Flow Hedges  
Loss Recognized in OCI (Effective Portion) $ (866)
Loss Reclassified from AOCI into Operations (Effective Portion) (37)
Interest rate contract
 
Derivatives Designated as Cash Flow Hedges  
Loss Recognized in OCI (Effective Portion) (866)
Loss Reclassified from AOCI into Operations (Effective Portion) $ (37)