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Income Taxes (Details 5) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Holiday [Line Items]      
Income taxes paid globally, net of refunds $ 60,427 $ 59,003 $ 60,576
Singapore and China      
Income Tax Holiday [Line Items]      
Tax benefits $ 1,065 $ 2,718 $ 3,627
Tax benefits (in dollars per share) $ 0.02 $ 0.05 $ 0.07