Financial Statements Details - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2020		Dec. 31, 2019	Jun. 30, 2019		Dec. 31, 2018
Balance Sheet Components [Abstract]
Cash and cash equivalents	$ 800,182		$ 1,111,286	$ 944,414
Restricted cash included in Other assets	4,307			4,222
Total cash, cash equivalents and restricted cash	804,489	[1]	$ 1,115,515	948,636	[1]	$ 654,164
Restricted cash, pledged as collateral	$ 4,000			$ 4,000

[1] See Note 4 of the accompanying notes for a reconciliation of the ending balance of cash, cash equivalents and restricted cash as shown in these condensed consolidated statements of cash flows.