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Business Segment Information
 3 Months Ended
Mar. 31, 2024
Segment Reporting [Abstract]  
BUSINESS SEGMENT INFORMATION BUSINESS SEGMENT INFORMATION
Our reportable segments for the three months ended March 31, 2024 were North America Regions, U.S. Federal, Europe, Alternative Fuels and All Other. On January 1, 2024, we changed the structure of our internal organization, and our U.S. Regions and Canada are now included in North America Regions. Additionally, our Asset Sustainability Group was formerly included in Canada, but is now included in “All Other”. As a result, previously reported amounts have been reclassified for comparative purposes.
Our North America Regions, U.S. Federal and Europe segments offer energy efficiency products and services which include the design, engineering and installation of equipment and other measures to improve the efficiency and control the operation of a facility’s energy infrastructure, renewable energy solutions and services and the development and construction of small-scale plants that Ameresco owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and O&M services.
Our Alternative Fuels segment sells electricity, thermal, renewable fuel, or biomethane using biogas as a feedstock from small-scale plants that we own and operate, and provides O&M services for customer-owned small-scale plants.
The “All Other” category includes consulting services and the sale of solar PV energy products and systems which we refer to as integrated-PV.
These segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the segments. Certain reportable segments are an aggregation of operating segments.
The tables below present our business segment information recast for the prior-year period and a reconciliation to the condensed consolidated financial statements:
North America RegionsU.S. FederalEuropeAlternative FuelsAll OtherTotal Consolidated
Three months ended March 31, 2024
Revenues$138,285 $60,890 $44,122 $32,859 $22,250 $298,406 
Gain on derivatives(1,256)(795)— (308)— (2,359)
Interest expense, net of interest income1,697 775 918 5,682 — 9,072 
Depreciation and amortization of intangible assets8,074 2,016 496 7,196 596 18,378 
Unallocated corporate activity— — — — — (22,143)
Income before taxes, excluding unallocated corporate activity5,593 7,357 (592)1,176 2,431 15,965 
North America RegionsU.S. FederalEuropeAlternative FuelsAll OtherTotal Consolidated
Three Months Ended March 31, 2023
Revenues$140,542 $59,556 $19,096 $28,339 $23,509 $271,042 
(Gain) loss on derivatives(295)(62)— 520 — 163 
Interest expense, net of interest income1,585 298 121 2,351 (2)4,353 
Depreciation and amortization of intangible assets6,453 1,225 175 5,868 131 13,852 
Unallocated corporate activity— — — — — (18,843)
Income before taxes, excluding unallocated corporate activity8,250 5,212 123 3,515 2,797 19,897 
See Note 3 for additional information about our revenues by product line.