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Fair Value Measurements and Derivative Instruments (Non-Derivative Net Investment) (Details) - Foreign currency debt - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Net investment hedge      
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) $ 6,111 $ 13,210  
Amount of Gain (Loss) Recognized In Other Comprehensive Income (Loss)     $ (38,971)