Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details)

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Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details) (Interest Rate Swap, Cash flow hedge, USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Interest Rate Swap | Cash flow hedge
       
Impact of the Swap on the consolidated financial statements        
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net $ 6,616   $ 6,616  
Effective portion of gain (loss) recognized in Accumulated other comprehensive income (loss) (6,234) 10,473 (9,605) 9,564
Effective portion of gain (loss) reclassified from Accumulated other comprehensive income (loss) into Net income (1,766) [1] (1,198) [1] (3,466) [1] (2,366) [1]
Ineffective portion of amount of gain (loss) recognized into Net income (loss) on interest rate swaps $ (2) [1] $ 61 [1] $ (3) [1] $ 80 [1]
[1] (a) Amounts are included in Interest expense in the unaudited condensed consolidated statements of operations and comprehensive income (loss).