Portfolio Financings - Schedule of PPA Entities' Assets and Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	[1]	$ 180,719	$ 246,947
Restricted cash, current	[1]	54,865	52,470
Accounts receivable	[1]	108,328	99,513
Customer financing receivable	[1]	5,515	5,428
Total current assets		584,472	618,604
Property and equipment, net	[1]	599,437	600,628
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Noncurrent	[1]	43,880	45,268
Restricted cash, non-current	[1]	130,080	117,293
Other long-term assets	[1]	35,199	34,511
Total assets		1,451,262	1,454,387
Current liabilities:
Accrued expenses and other current liabilities	[1]	82,133	112,004
Deferred revenue and customer deposits	[1]	69,240	114,286
Non-recourse debt		118,468	120,846
Total current liabilities		369,308	436,377
Deferred revenue and customer deposits, non-current	[1]	84,472	87,463
Long-term portion of debt		390,031	270,053
Other long-term liabilities	[1]	19,867	17,268
Total liabilities		1,386,860	1,312,991
PPA Entities
Current assets:
Cash and cash equivalents		856	1,421
Restricted cash, current		1,686	4,698
Accounts receivable		4,359	4,420
Customer financing receivable		5,515	5,428
Prepaid expenses and other current assets		1,822	3,048
Total current assets		14,238	19,015
Property and equipment, net		246,216	252,020
Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Noncurrent		43,880	45,268
Restricted cash, non-current		15,367	15,320
Other long-term assets		38	37
Total assets		319,739	331,660
Current liabilities:
Accrued expenses and other current liabilities		14,587	19,510
Deferred revenue and customer deposits		662	662
Non-recourse debt		118,468	120,846
Total current liabilities		133,717	141,018
Deferred revenue and customer deposits, non-current		5,909	6,072
Long-term portion of debt		99,942	102,045
Total liabilities		$ 239,568	$ 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).