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Income Taxes - Income from Continuing Operations before Income Taxes Attributable to Geographic Locations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Domestic $ 18,395 $ 328,806 $ 298,009
Foreign 497,830 363,791 135,029
Income before income taxes $ 516,225 $ 692,597 $ 433,038