Quarterly report pursuant to Section 13 or 15(d)

Derivatives (Details 2)

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Derivatives (Details 2) (Interest rate swaps (Swaps), Cash flow hedge, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Interest rate swaps (Swaps) | Cash flow hedge
   
Impact of the Swap on the consolidated financial statements    
Effective portion of gain (loss) recognized in Accumulated other comprehensive income (loss) $ (3,371) $ (909)
Effective portion of gain (loss) reclassified from Accumulated other comprehensive income (loss) into Net income (1,700) (1,168)
Ineffective portion of amount of gain (loss) recognized into Net income (loss) on interest rate swaps $ (1) $ 19