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Other Income (Expense), Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Income (Expense), Net [Abstract]      
Other income (expense), net $ (21,194) $ (8,916) $ (18,265)
Interest expense $ 21,800 $ 22,200 $ 15,600