Portfolio Financings - Schedule of PPA Entities' Assets and Liabilities (Details) - USD ($) $ in Thousands		Dec. 31, 2020		Jan. 01, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	[1]	$ 246,947			$ 202,823
Restricted cash, current	[1]	52,470			30,804
Accounts receivable	[1]	99,513			37,828
Customer financing receivable	[1]	5,428			5,108
Total current assets		618,604			472,707
Property and equipment, net	[1]	600,628			607,059
Non-current portion of net investment in sales-type leases	[1]	45,268			50,747
Restricted cash, non-current	[1]	117,293			143,761
Other long-term assets	[1]	34,511			41,652
Total assets		1,454,387		$ 1,350,712	1,322,591
Current liabilities:
Accrued expenses and other current liabilities		112,004	[1]	68,970	70,284	[1]
Deferred revenue and customer deposits	[1]	114,286			89,192
Current portion of debt		120,846			337,583
Total current liabilities		436,377		578,185	573,964
Derivative liabilities	[1]	4,989			17,551
Deferred revenue and customer deposits, non-current	[1]	87,463			125,529
Long-term portion of debt		270,053			299,229
Other long-term liabilities		12,279	[1]	17,673	28,013	[1]
Total liabilities		1,312,991		$ 1,518,572	1,490,451
PPA Entities
Current assets:
Cash and cash equivalents		1,421			1,894
Restricted cash, current		4,698			2,244
Accounts receivable		4,420			4,194
Customer financing receivable		5,428			5,108
Prepaid expenses and other current assets		3,048			3,587
Total current assets		19,015			17,027
Property and equipment, net		252,020			275,481
Non-current portion of net investment in sales-type leases		45,268			50,747
Restricted cash, non-current		15,320			15,045
Other long-term assets		37			607
Total assets		331,660			358,907
Current liabilities:
Accrued expenses and other current liabilities		19,510			1,391
Deferred revenue and customer deposits		662			662
Current portion of debt		120,846			12,155
Total current liabilities		141,018			14,208
Derivative liabilities		0			8,459
Deferred revenue and customer deposits, non-current		6,072			6,735
Long-term portion of debt		102,045			223,267
Other long-term liabilities		0			2,355
Total liabilities		$ 249,135			$ 255,024

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