Financial Instruments - Restricted Cash (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2019
Variable Interest Entity [Line Items]
Restricted cash, current	[1]	$ 70,141	$ 92,540
Restricted cash, non-current	[1]	137,748	126,539
Restricted cash, total		207,889	219,079
Consolidated Entity, Excluding Consolidated VIE
Variable Interest Entity [Line Items]
Restricted cash, current		67,983	89,462
Restricted cash, non-current		114,484	103,300
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Restricted cash, current		1,710	3,078
Restricted cash, non-current		17,196	23,239
Variable Interest Entity, Primary Beneficiary | Power Purchase Agreements Entities
Variable Interest Entity [Line Items]
Restricted cash, current		2,158	3,078
Restricted cash, non-current		23,264	23,239
Variable Interest Entity, Primary Beneficiary | PPA II
Variable Interest Entity [Line Items]
Restricted cash, current		41,200	41,700
Restricted cash, non-current		50,400	57,700
Restricted cash, total		91,600
Variable Interest Entity, Primary Beneficiary | PPA Company IIIA
Variable Interest Entity [Line Items]
Restricted cash, current		400
Restricted cash, non-current		6,100
Variable Interest Entity, Primary Beneficiary | PPA IIIB
Variable Interest Entity [Line Items]
Restricted cash, current		1,500	1,200
Restricted cash, non-current		$ 6,700	$ 6,700
Restricted cash, total				$ 20,000

[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).