Balance Sheet Components - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 1,812,000		$ 1,812,000		$ 1,532,000
Operating lease liabilities	1,914,000		1,914,000		1,613,000
Current operating lease liabilities	227,000		227,000		190,000
Non-current operating lease liabilities	1,687,000		1,687,000		$ 1,423,000
Cash paid for operating lease liabilities	59,473	$ 41,320	116,963	$ 78,973
Right-of-use assets obtained in exchange for new operating lease obligations	$ 364,606	$ 230,499	$ 416,430	$ 1,072,894
ASU 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets						$ 743,000