Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Interest Rates Swaps Designated as Cash Flow Hedges (Details 9)

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Fair Value Measurements and Derivatives - Effects of Interest Rates Swaps Designated as Cash Flow Hedges (Details 9) - Cash Flow Hedging - Designated as Hedging Instrument - Interest Rate Swap - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]    
Loss recognized in other comprehensive income (loss) - effective portion $ (2,555) $ (3,589)
Gain (loss) recognized in other income (expense) - ineffective portion 3 (7)
Amount reclassified from accumulated other comprehensive income (loss) into interest expense, net $ 1,000 $ 937