Balance Sheet Components - Accrued Other Current Liabilities (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Compensation and benefits		$ 30,461	$ 28,343
Current portion of derivative liabilities		13,344	19,116
Sales-related liabilities		5,635	14,479
Accrued installation		10,202	16,468
Sales tax liabilities		2,596	2,732
Interest payable		2,156	2,224
Other		31,657	28,642
Accrued other current liabilities	[1]	$ 96,051	$ 112,004

[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 11 - Portfolio Financings).