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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Outstanding balance	$ 262,955		$ 262,955		$ 261,161
Related Party | TOTALEnergies S.E.
Related Party Transaction [Line Items]
Proceeds from related party				$ 1,400
Related Party | SAFE&CEC S.r.l.
Related Party Transaction [Line Items]
Proceeds from related party		$ 100		300
Receivables from related party	500		500		300
Payable to related parties					8,100
Outstanding balance	3,400		3,400
Related Party | Management Fee for Services | TotalEnergies JV and bpJV
Related Party Transaction [Line Items]
Proceeds from related party	800	500	1,600	900
Receivables from related party	700		700		300
Related Party | Business Expenses Reimbursement | TOTALEnergies S.E.
Related Party Transaction [Line Items]
Related party expense	1,600	1,800	3,200	2,500
Related Party | Business Expenses Reimbursement | SAFE&CEC S.r.l.
Related Party Transaction [Line Items]
Related party expense		6,200	2,500	9,200
Related Party | Business Expenses Reimbursement | TotalEnergies JV and bpJV
Related Party Transaction [Line Items]
Receivables from related party	600		600		700
Related party expense		800	100	1,200
Related Party | Management Fee for Services & Business Expenses Reimbursement | TotalEnergies JV and bpJV
Related Party Transaction [Line Items]
Proceeds from related party	1,000	2,700	1,900	3,000
Related party expense		0		0
Related Party | Sharing of Environmental Credits | TotalEnergies JV and bpJV
Related Party Transaction [Line Items]
Related party expense	1,200		2,300
Payable to related parties	400		400		600
Other Equity Method Investees | Rimere
Related Party Transaction [Line Items]
Proceeds from related party		0		0
Receivables from related party	100		100		0
Other Equity Method Investees | Management Fee for Services | Rimere
Related Party Transaction [Line Items]
Proceeds from related party	200	200	300	300
Receivables from related party	100		100		700
Other Equity Method Investees | Loan Commitment | Rimere
Related Party Transaction [Line Items]
Amount provided for funding in certain equity method investee	0	$ 1,200	3,500	$ 2,300
Other Equity Method Investees | Loan Commitment | Convertible promissory note | Rimere
Related Party Transaction [Line Items]
Receivables from related party	3,500		3,500		$ 2,300
Other Equity Method Investees | Equipment Sold | Rimere
Related Party Transaction [Line Items]
Proceeds from related party	$ 100		$ 100

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