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Derivatives Not Designated as Hedging Relationships (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Other Income (Expense) [Member]        
Derivative Instruments Not Designated as Hedging Instruments [Abstract]        
Foreign exchange forward contracts $ (329) $ (1,149) $ (1,241) $ 964
Interest Rate Cap [Member] | Interest Expense [Member]        
Derivative Instruments Not Designated as Hedging Instruments [Abstract]        
Interest rate cap contracts $ 0 $ 0 $ 0 $ 377