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Fair Value Measurements - Schedule of Investments Classified as Available for Sale Securities with Contractual Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair Value Disclosures [Abstract]    
Cash and cash equivalents $ 390,260 $ 173,415
Short-term investments (due within one year) 436,666 555,231 [1]
Long-term investments (due between one and two years) 57,986 6,440
Total cash, cash equivalents and investments in marketable securities $ 884,912 $ 735,086
[1] The Condensed Consolidated Balance Sheet as of December 31, 2020 has been derived from the audited financial statements as of that date.