Related Party Transactions - Related Party Transactions and Balances (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2023 USD ($) Loan	Mar. 31, 2024 USD ($)
Related Party Transaction [Line Items]
Accounts receivable	[1],[2]	$ 340,740	$ 348,422
Contract assets	[3]	41,366	33,788
Deferred cost of revenue, current	[4]	45,984	56,051
Prepaid expenses and other current assets	[1],[5]	51,148	47,639
Operating lease right-of-use assets	[1],[6]	139,732	138,941
Other long-term assets	[1],[7]	50,208	52,363
Accounts payable	[1],[8]	132,078	94,231
Accrued expenses and other current liabilities	[1],[9]	130,879	99,307
Deferred revenue and customer deposits, current	[1],[10]	128,922	94,696
Operating lease liabilities, current	[1],[11]	20,245	20,513
Operating lease liabilities, non-current	[1],[12]	141,939	141,024
Non-recourse debt		846,633	847,935
SK Ecoplant
Related Party Transaction [Line Items]
Accounts receivable		19,567	13,056
Prepaid expenses and other current assets		644	2,054
Operating lease right-of-use assets		2,138	1,959
Other long-term assets		46	44
Accounts payable		3,480	1,693
Accrued expenses and other current liabilities		2,347	4,221
Operating lease liabilities, current		440	439
Operating lease liabilities, non-current		$ 1,617	1,442
SK Ecoplant | Korean Joint Venture
Related Party Transaction [Line Items]
Number of term loans | Loan		2
Related Party
Related Party Transaction [Line Items]
Accounts receivable		$ 262,031	292,356
Contract assets		6,872	3,531
Deferred cost of revenue, current		875	0
Prepaid expenses and other current assets		2,257	2,180
Operating lease right-of-use assets		2,031	1,853
Other long-term assets		9,069	8,270
Accounts payable		77	0
Accrued expenses and other current liabilities		3,427	6,095
Deferred revenue and customer deposits, current		1,707	5,678
Operating lease liabilities, current		440	439
Deferred revenue and customer deposits, non-current		6,709	3,544
Operating lease liabilities, non-current		1,617	1,442
Non-recourse debt		$ 4,627	$ 4,458

[1] We have a variable interest entity related to a joint venture in the Republic of Korea (see Note 15 — SK ecoplant Strategic Investment), which represents a portion of the consolidated balances recorded within these financial statement line items.

[2] Including amounts from related parties of $292.4 million and $262.0 million as of March 31, 2024 and December 31, 2023, respectively.

[3] Including amounts from related parties of $3.5 million and $6.9 million as of March 31, 2024 and December 31, 2023, respectively.

[4] Including amounts from related parties of $0.9 million as of December 31, 2023. There were no amounts from related parties as of March 31, 2024.

[5] Including amounts from related parties of $2.2 million and $2.3 million as of March 31, 2024 and December 31, 2023, respectively.

[6] Including amounts from related parties of $1.9 million and $2.0 million as of March 31, 2024 and December 31, 2023, respectively.

[7] Including amounts from related parties of $8.3 million and $9.1 million as of March 31, 2024 and December 31, 2023, respectively.

[8] Including amounts from related parties of $0.1 million as of December 31, 2023. There were no amounts from related parties as of March 31, 2024.

[9] Including amounts from related parties of $6.1 million and $3.4 million as of March 31, 2024 and December 31, 2023, respectively.

[10] Including amounts from related parties of $5.7 million and $1.7 million as of March 31, 2024 and December 31, 2023, respectively.

[11] Including amounts from related parties of $0.4 million and $0.4 million as of March 31, 2024 and December 31, 2023, respectively.

[12] Including amounts from related parties of $1.4 million and $1.6 million as of March 31, 2024 and December 31, 2023, respectively.