Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Foreign Currency Which Was not Designated As Cash Flow Hedge (Details 8)

v3.8.0.1
Fair Value Measurements and Derivatives - Effects of Foreign Currency Which Was not Designated As Cash Flow Hedge (Details 8) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Not Designated as Hedging Instrument | Foreign Currency Collar | Cash Flow Hedging        
Derivative Instruments Gain Loss [Line Items]        
Gain recognized in other income (expense), net $ 0 $ 0 $ 0 $ 10,312