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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 500,873 | $ 335,149 | $ 1,237,261 | $ 933,265
Percentage of revenue recognized over time | 97.00% | 95.00% | 96.00% | 94.00%
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 431,918 | $ 279,651 | $ 1,020,517 | $ 783,692
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16,337 | 15,535 | 46,933 | 46,335
Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 52,618 | 39,963 | 169,811 | 103,238
Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 385,377 | 242,684 | 920,424 | 654,801
O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 28,425 | 22,772 | 79,930 | 68,048
Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 59,130 | 44,259 | 155,700 | 135,037
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 27,941 | 25,434 | 81,207 | 75,379
North America Regions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 291,611 | 157,700 | 638,027 | 450,013
North America Regions | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 258,977 | 133,169 | 553,930 | 376,984
North America Regions | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,284 | 6,369 | 25,728 | 18,270
North America Regions | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 20,444 | 17,185 | 53,944 | 50,983
North America Regions | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,906 | 977 | 4,425 | 3,776
U.S. Federal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 89,113 | 87,341 | 236,740 | 226,916
U.S. Federal | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 66,162 | 71,779 | 177,721 | 181,232
U.S. Federal | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15,817 | 13,838 | 45,723 | 40,439
U.S. Federal | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,096 | 1,495 | 12,749 | 4,735
U.S. Federal | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 38 | 229 | 547 | 510
Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 52,613 | 40,500 | 169,794 | 103,121
Europe | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 49,943 | 37,736 | 161,431 | 95,335
Europe | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 480 | 492 | 2,122 | 1,285
Europe | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 197 | 326 | 557 | 1,297
Europe | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,993 | 1,946 | 5,684 | 5,204
Alternative Fuels |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 43,537 | 27,319 | 122,248 | 85,974
Alternative Fuels | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,295 | 0 | 27,342 | 0
Alternative Fuels | O&M revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,844 | 2,073 | 6,357 | 8,054
Alternative Fuels | Energy assets |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 31,393 | 25,227 | 88,421 | 77,901
Alternative Fuels | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5 | 19 | 128 | 19
All Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 23,999 | 22,289 | 70,452 | 67,241
All Other | Project revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 1,250
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 | 26 | 29 | 121
All Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 23,999 | $ 22,263 | $ 70,423 | $ 65,870

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