CONSOLIDATED FINANCIAL STATEMENT DETAILS - Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 777,041	$ 812,705	$ 384,230	$ 390,565
Restricted cash included in other current assets	176	407	623	504
Restricted cash included in other non-current assets	433	449	398	409
Total cash and cash equivalents, and restricted cash as shown on the consolidated statement of cash flows	$ 777,650	$ 813,561	$ 385,251	$ 391,478