Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Foreign Currency Forward Contracts Designated as Cash Flow Hedges (Details 5)

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Fair Value Measurements and Derivatives - Effects of Foreign Currency Forward Contracts Designated as Cash Flow Hedges (Details 5) - Cash Flow Hedging - Designated as Hedging Instrument - Foreign Currency Forward Contracts - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in other comprehensive income - effective portion $ 136,428 $ (79,900) $ 155,064 $ 2,611
Gain (loss) recognized in other income (expense), net - ineffective portion (16) (2) (66) 9
Amount reclassified from accumulated other comprehensive income (loss) into depreciation and amortization expense $ 656 $ 656 $ 1,274 $ 1,301