Power Purchase Agreement Programs - Schedule of PPA Entities' Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020		Dec. 31, 2019		Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 180,307	[1]	$ 202,823	[1]	$ 320,414
Restricted cash	29,730	[1]	30,804	[1]	18,419
Accounts receivable	35,691	[1]	37,828	[1]	85,647
Customer financing receivable	5,170	[1]	5,108	[1]	5,717
Total current assets	462,895		472,707		633,052
Property and equipment, net	606,850	[1]	607,059	[1]	711,631
Customer financing receivable, non-current	49,446	[1]	50,747	[1]	65,620
Restricted cash	143,882	[1]	143,761	[1]	31,101
Other long-term assets	44,596	[1]	41,652	[1]	45,447
Total assets	1,312,608		1,322,591		1,488,784
Current liabilities:
Accounts payable	60,401	[1]	55,579	[1]	64,425
Accrued expenses and other current liabilities	77,809	[1]	70,284	[1]	64,073
Deferred revenue and customer deposits	99,046	[1]	89,192	[1]	75,069
Current portion of debt	26,226		337,583
Total current liabilities	285,744		573,964		264,133
Derivative liabilities	23,377	[1]	17,551	[1]	15,722
Deferred revenue	120,927	[1]	125,529	[1]	103,751
Long-term portion of debt	669,775		299,229
Other long-term liabilities	28,543		28,013		28,970
Total liabilities	1,571,773		1,490,451		$ 1,510,181
Variable Interest Entity, Primary Beneficiary
Current assets:
Cash and cash equivalents	3,104		1,894
Restricted cash	2,208		2,244
Accounts receivable	4,207		4,194
Customer financing receivable	5,170		5,108
Prepaid expenses and other current assets	2,212		3,587
Total current assets	16,901		17,027
Property and equipment, net	269,680		275,481
Customer financing receivable, non-current	49,446		50,747
Restricted cash	15,172		15,045
Other long-term assets	301		607
Total assets	351,500		358,907
Current liabilities:
Accounts payable	0		0
Accrued expenses and other current liabilities	2,058		1,391
Deferred revenue and customer deposits	662		662
Current portion of debt	11,109		12,155
Total current liabilities	13,829		14,208
Derivative liabilities	15,470		8,459
Deferred revenue	6,570		6,735
Long-term portion of debt	220,892		223,267
Other long-term liabilities	2,492		2,355
Total liabilities	$ 259,253		$ 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 condensed consolidated balance sheets (see Note 13, Power Purchase Agreement Programs).