Balance Sheet Components - Other Long-Term Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020		Dec. 31, 2019		Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid and other long-term assets	$ 30,862		$ 29,153
Deferred commissions	6,143		5,007
Equity-method investments	2,119		5,733
Long-term deposits	1,865		1,759
Other long-term assets	$ 40,989	[1]	$ 41,652	[1]	$ 72,836

[1] We have variable interest entities which represent a portion of the consolidated balances recorded within these financial statement line items in the condensed consolidated balance sheets (see Note 13, Power Purchase Agreement Programs).