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Income Taxes - Components of Income (Loss) Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income before income taxes:      
Domestic $ 632,791 $ 550,676 $ 318,635
Foreign (61,445) 21,611 139,031
Income before income taxes $ 571,346 $ 572,287 $ 457,666