Portfolio Financings - Schedule of PPA Entities' Assets and Liabilities (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	[1]	$ 121,861	$ 246,947
Restricted cash, current	[1]	65,315	52,470
Accounts receivable	[1]	62,066	96,186
Customer financing receivable	[1]	5,693	5,428
Total current assets		530,940	618,604
Property and equipment, net	[1]	615,514	600,628
Customer financing receivable, non-current	[1]	40,981	45,268
Restricted cash, non-current	[1]	132,725	117,293
Other long-term assets	[1]	38,593	34,511
Total assets		1,431,726	1,454,387
Current liabilities:
Accrued expenses and other current liabilities	[1]	85,877	112,004
Deferred revenue and customer deposits	[1]	81,894	114,286
Non-recourse debt		13,816	120,846
Total current liabilities		311,868	436,377
Deferred revenue and customer deposits, non-current	[1]	67,887	87,463
Non-recourse debt, non-current		490,380	270,053
Other long-term liabilities		26,755	17,268
Total liabilities		1,431,351	1,312,991
PPA Entities
Current assets:
Cash and cash equivalents		3,069	1,421
Restricted cash, current		1,256	4,698
Accounts receivable		4,262	4,420
Customer financing receivable		5,693	5,428
Prepaid expenses and other current assets		3,072	3,048
Total current assets		17,352	19,015
Property and equipment, net		234,436	252,020
Customer financing receivable, non-current		40,981	45,268
Restricted cash, non-current		15,224	15,320
Other long-term assets		0	37
Total assets		307,993	331,660
Current liabilities:
Accrued expenses and other current liabilities		15,430	19,510
Deferred revenue and customer deposits		662	662
Non-recourse debt		7,782	120,846
Total current liabilities		23,874	141,018
Deferred revenue and customer deposits, non-current		5,577	6,072
Non-recourse debt, non-current		439,779	102,045
Total liabilities		$ 469,230	$ 249,135

[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).