Financial Instruments - Restricted Cash (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Restricted cash, current	[1]	$ 54,865	$ 52,470
Restricted cash, non-current	[1]	130,080	117,293
Restricted cash, total		184,945	169,763
Consolidated Entity, Excluding VIEs
Variable Interest Entity [Line Items]
Restricted cash, current		53,179	26,706
Restricted cash, non-current		114,713	286
PPA Entities
Variable Interest Entity [Line Items]
Restricted cash, current		1,686	4,698
Restricted cash, non-current		15,367	15,320
PPA Entities | PPA II
Variable Interest Entity [Line Items]
Restricted cash, current		28,200	20,300
Restricted cash, non-current		80,500	88,400
Restricted cash, total		108,700
PPA Entities | PPA IIIb
Variable Interest Entity [Line Items]
Restricted cash, current		1,000	700
Restricted cash, non-current		13,300	13,300
PPA Entities | Power Purchase Agreements Entities
Variable Interest Entity [Line Items]
Restricted cash, current		1,686	25,764
Restricted cash, non-current		$ 15,367	$ 117,007

[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).