Balance Sheet Components Deferred Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Notes To Financial Statements [Abstract]
Deferred revenues - current	$ 684,139		$ 684,139		$ 563,762
Deferred revenues - long-term	46,986		46,986		$ 35,503
Deferred revenues	$ 99,600	$ 70,100	$ 263,300	$ 207,000