Financial Statements Details - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020		Dec. 31, 2019	Mar. 31, 2019		Dec. 31, 2018
Balance Sheet Components [Abstract]
Cash and cash equivalents	$ 761,333		$ 1,111,286	$ 809,491
Restricted cash included in other assets	4,307			4,218
Total cash, cash equivalents and restricted cash	765,640	[1]	$ 1,115,515	813,709	[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 this condensed consolidated statements of cash flows.