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Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]      
Net loss $ (944,839) $ (1,033,660) $ (1,255,911)
Other comprehensive income (loss), net of tax      
Unrealized gain (loss) on marketable securities, net of tax (516) 797 710
Foreign currency translation 21,306 (3,371) (11,720)
Total other comprehensive income (loss), net of tax 20,790 (2,574) (11,010)
Total comprehensive income (loss) $ (924,049) $ (1,036,234) $ (1,266,921)