CONSOLIDATED AND COMBINED FINANCIAL STATEMENT DETAILS - Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 390,565	$ 336,984	$ 221,521	$ 36,377
Restricted cash included in other current assets	504	1,417	0	0
Restricted cash included in other assets	409	420	0	10,548
Total cash and cash equivalents and restricted cash as shown on the consolidated and combined statement of cash flows	$ 391,478	$ 338,821	$ 221,521	$ 46,925