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REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 352,829 | $ 298,406
Percentage of revenue recognized over time | 95.00% | 94.00%
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 232,613 | $ 239,099
Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 23,551 | 15,180
Europe |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 96,665 | 44,127
Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 251,461 | 204,284
O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 24,846 | 25,335
Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 56,693 | 43,154
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 19,829 | 25,633
North America Regions |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 178,260 | 138,285
North America Regions | Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 148,953 | 116,211
North America Regions | O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,456 | 6,933
North America Regions | Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 18,970 | 13,754
North America Regions | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,881 | 1,387
U.S. Federal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 25,247 | 60,890
U.S. Federal | Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 6,038 | 43,479
U.S. Federal | O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 13,730 | 15,278
U.S. Federal | Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 5,357 | 1,929
U.S. Federal | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 122 | 204
Renewable Fuels |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 38,175 | 32,859
Renewable Fuels | Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,063 | 3,163
Renewable Fuels | O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,015 | 2,377
Renewable Fuels | Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 32,097 | 27,300
Renewable Fuels | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 19
Europe |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 96,657 | 44,122
Europe | Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 92,407 | 41,424
Europe | O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 645 | 747
Europe | Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 269 | 171
Europe | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,336 | 1,780
All Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 14,490 | 22,250
All Other | Project revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 7
All Other | O&M revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
All Other | Energy assets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
All Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 14,490 | $ 22,243

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