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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 9 Months Ended
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Sep. 30, 2024
Revenue from Contract with Customer [Abstract] |
Summary of Disaggregation of Revenue | The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2024:
| North America Regions |  | U.S. Federal |  | Europe |  | Alternative Fuels |  | All Other |  | Total
Project revenue | $ | 258,977 |  |  | $ | 66,162 |  |  | $ | 49,943 |  |  | $ | 10,295 |  |  | $ | — |  |  | $ | 385,377 |
O&M revenue | 10,284 |  |  | 15,817 |  |  | 480 |  |  | 1,844 |  |  | — |  |  | 28,425 |
Energy assets | 20,444 |  |  | 7,096 |  |  | 197 |  |  | 31,393 |  |  | — |  |  | 59,130 |
Other | 1,906 |  |  | 38 |  |  | 1,993 |  |  | 5 |  |  | 23,999 |  |  | 27,941 |
Total revenues | $ | 291,611 |  |  | $ | 89,113 |  |  | $ | 52,613 |  |  | $ | 43,537 |  |  | $ | 23,999 |  |  | $ | 500,873 |
The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2023:
| North America Regions |  | U.S. Federal |  | Europe |  | Alternative Fuels |  | All Other |  | Total
Project revenue | $ | 133,169 |  |  | $ | 71,779 |  |  | $ | 37,736 |  |  | $ | — |  |  | $ | — |  |  | $ | 242,684 |
O&M revenue | 6,369 |  |  | 13,838 |  |  | 492 |  |  | 2,073 |  |  | — |  |  | 22,772 |
Energy assets | 17,185 |  |  | 1,495 |  |  | 326 |  |  | 25,227 |  |  | 26 |  |  | 44,259 |
Other | 977 |  |  | 229 |  |  | 1,946 |  |  | 19 |  |  | 22,263 |  |  | 25,434 |
Total revenues | $ | 157,700 |  |  | $ | 87,341 |  |  | $ | 40,500 |  |  | $ | 27,319 |  |  | $ | 22,289 |  |  | $ | 335,149 |
The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2024:
| North America Regions |  | U.S. Federal |  | Europe |  | Alternative Fuels |  | All Other |  | Total
Project revenue | $ | 553,930 |  |  | $ | 177,721 |  |  | $ | 161,431 |  |  | $ | 27,342 |  |  | $ | — |  |  | $ | 920,424 |
O&M revenue | 25,728 |  |  | 45,723 |  |  | 2,122 |  |  | 6,357 |  |  | — |  |  | 79,930 |
Energy assets | 53,944 |  |  | 12,749 |  |  | 557 |  |  | 88,421 |  |  | 29 |  |  | 155,700 |
Other | 4,425 |  |  | 547 |  |  | 5,684 |  |  | 128 |  |  | 70,423 |  |  | 81,207 |
Total revenues | $ | 638,027 |  |  | $ | 236,740 |  |  | $ | 169,794 |  |  | $ | 122,248 |  |  | $ | 70,452 |  |  | $ | 1,237,261 |
The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2023:
| North America Regions |  | U.S. Federal |  | Europe |  | Alternative Fuels |  | All Other |  | Total
Project revenue | $ | 376,984 |  |  | $ | 181,232 |  |  | $ | 95,335 |  |  | $ | — |  |  | $ | 1,250 |  |  | $ | 654,801 |
O&M revenue | 18,270 |  |  | 40,439 |  |  | 1,285 |  |  | 8,054 |  |  | — |  |  | 68,048 |
Energy assets | 50,983 |  |  | 4,735 |  |  | 1,297 |  |  | 77,901 |  |  | 121 |  |  | 135,037 |
Other | 3,776 |  |  | 510 |  |  | 5,204 |  |  | 19 |  |  | 65,870 |  |  | 75,379 |
Total revenues | $ | 450,013 |  |  | $ | 226,916 |  |  | $ | 103,121 |  |  | $ | 85,974 |  |  | $ | 67,241 |  |  | $ | 933,265 |
The following table presents information related to our revenue recognized over time:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Percentage of revenue recognized over time | 97% |  | 95% |  | 96% |  | 94%
The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized. We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
United States | $ | 431,918 |  |  | $ | 279,651 |  |  | $ | 1,020,517 |  |  | $ | 783,692 |
Canada | 16,337 |  |  | 15,535 |  |  | 46,933 |  |  | 46,335 |
Europe | 52,618 |  |  | 39,963 |  |  | 169,811 |  |  | 103,238 |
Total revenues | $ | 500,873 |  |  | $ | 335,149 |  |  | $ | 1,237,261 |  |  | $ | 933,265 |
Summary of Contract with Customer, Asset and Liability | The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:
|  | September 30, 2024 |  | December 31, 2023
Accounts receivable, net |  | $ | 230,298 |  |  | $ | 153,362 |
Accounts receivable retainage, net |  | 43,466 |  |  | 33,826 |
Contract Assets: |  |  |  |
Costs and estimated earnings in excess of billings |  | $ | 572,804 |  |  | $ | 636,163 |
Contract Liabilities: |  |  |  |
Billings in excess of cost and estimated earnings |  | $ | 108,020 |  |  | $ | 52,903 |
Billings in excess of cost and estimated earnings, non-current (1) |  | 20,808 |  |  | 18,393 |
Total contract liabilities |  | $ | 128,828 |  |  | $ | 71,296 |
| September 30, 2023 |  | December 31, 2022
Accounts receivable, net | $ | 133,070 |  |  | $ | 174,009 |
Accounts receivable retainage, net | 33,459 |  |  | 38,057 |
Contract Assets: |  |  |
Costs and estimated earnings in excess of billings | $ | 591,378 |  |  | $ | 576,363 |
Contract Liabilities: |  |  |
Billings in excess of cost and estimated earnings | $ | 36,880 |  |  | $ | 34,796 |
Billings in excess of cost and estimated earnings, non-current (1) | 15,622 |  |  | 7,617 |
Total contract liabilities | $ | 52,502 |  |  | $ | 42,413 |
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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