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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 472,284 | $ 437,982 | $ 825,113 | $ 736,388
Percentage of revenue recognized over time | 96.00% | 96.00% | 96.00% | 95.00%
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 301,923 | $ 349,500 | $ 534,536 | $ 588,599
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 28,417 | 15,416 | 51,968 | 30,596
Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 141,944 | 73,066 | 238,609 | 117,193
Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 358,088 | 330,763 | 609,549 | 535,047
O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 27,955 | 26,170 | 52,801 | 51,505
Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 62,909 | 53,416 | 119,602 | 96,570
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 23,332 | 27,633 | 43,161 | 53,266
North America Regions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 211,185 | 208,131 | 389,445 | 346,416
North America Regions | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 174,287 | 178,742 | 323,240 | 294,953
North America Regions | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,474 | 8,511 | 18,930 | 15,444
North America Regions | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 22,669 | 19,746 | 41,639 | 33,500
North America Regions | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,755 | 1,132 | 5,636 | 2,519
U.S. Federal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 59,644 | 86,737 | 84,891 | 147,627
U.S. Federal | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 37,459 | 68,080 | 43,497 | 111,559
U.S. Federal | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15,063 | 14,628 | 28,793 | 29,906
U.S. Federal | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,780 | 3,724 | 12,137 | 5,653
U.S. Federal | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 342 | 305 | 464 | 509
Renewable Fuels |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,819 | 45,852 | 80,994 | 78,711
Renewable Fuels | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,983 | 13,884 | 12,046 | 17,047
Renewable Fuels | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,762 | 2,136 | 3,777 | 4,513
Renewable Fuels | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 33,071 | 29,728 | 65,168 | 57,028
Renewable Fuels | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3 | 104 | 3 | 123
Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 141,884 | 73,059 | 238,541 | 117,181
Europe | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 138,359 | 70,064 | 230,766 | 111,488
Europe | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 656 | 895 | 1,301 | 1,642
Europe | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 389 | 189 | 658 | 360
Europe | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,480 | 1,911 | 5,816 | 3,691
All Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16,752 | 24,203 | 31,242 | 46,453
All Other | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | (7) | 0 |
All Other | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
All Other | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 29 | 0 | 29
All Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 16,752 | $ 24,181 | $ 31,242 | $ 46,424

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