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Derivative Instruments and Hedging Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Derivative instruments and hedging activity for the period [Abstract]      
Cash flow hedges adjustment, net of tax $ 816 $ (584) $ (249)
Impact of foreign exchange rates on debt instruments recorded in Other Comprehensive Income $ 13,661 (28,871) $ 6,989
Maximum [Member]      
Derivative instruments and hedging activity for the period [Abstract]      
Number of months for contracts to mature 18 months    
Forward Exchange Contracts [Member]      
Derivative instruments and hedging activity for the period [Abstract]      
Cash flow hedges adjustment, net of tax $ 816    
Forward Exchange Contracts [Member] | Maximum [Member]      
Derivative instruments and hedging activity for the period [Abstract]      
Number of months for contracts to mature 18 months    
Forward Exchange Contracts [Member] | Cash Flow Hedging [Member]      
Derivative instruments and hedging activity for the period [Abstract]      
Derivative, fair value $ 76,000 44,900  
Foreign Currency Denominated Debt, Net Investment Hedging [Member]      
Derivative instruments and hedging activity for the period [Abstract]      
Carrying value of foreign denominated debt 366,500 261,900  
Impact of foreign exchange rates on debt instruments recorded in Other Comprehensive Income $ 13,661 $ (28,871)