Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
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 loss $ 7,014 $ (15,715)
Effective portion of loss reclassified from Accumulated other comprehensive loss into Net income (5,303) (3,472)
Ineffective portion of amount of gain (loss) recognized into Net income on interest rate swaps $ 24