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Business Segment Information
 9 Months Ended
Sep. 30, 2023
Segment Reporting [Abstract]  
BUSINESS SEGMENT INFORMATION BUSINESS SEGMENT INFORMATION
Our reportable segments for the three and nine months ended September 30, 2023 were U.S. Regions, U.S. Federal, Canada, Alternative Fuels and All Other.
Our U.S. Regions, U.S. Federal and Canada 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 and processed renewable natural gas (“RNG”) derived from biomethane from small-scale plants that we own and operate and provides O&M services for customer-owned small-scale RNG plants.
The “All Other” category includes enterprise energy management services, other than the U.S.-based portion; consulting services, energy efficiency products and services outside of the U.S. and Canada; 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:
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal Consolidated
Three Months Ended September 30, 2023
Revenues$143,239 $87,341 $17,534 $27,319 $59,716 $335,149 
Gain on derivatives(1,658)(792)(107)(490)— (3,047)
Interest expense, net of interest income1,583 278 175 4,762 766 7,564 
Depreciation and amortization of intangible assets7,031 1,229 408 6,668 1,277 16,613 
Unallocated corporate activity— — — — — (20,380)
Income before taxes, excluding unallocated corporate activity15,161 12,128 1,106 820 1,953 31,168 
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal Consolidated
Three Months Ended September 30, 2022
Revenues$271,206 $99,124 $12,366 $29,421 $29,179 $441,296 
Gain on derivatives(329)— (121)(330)— (780)
Interest expense, net of interest income1,694 306 196 2,589 (48)4,737 
Depreciation and amortization of intangible assets5,300 1,219 420 6,391 199 13,529 
Unallocated corporate activity— — — — — (18,971)
Income before taxes, excluding unallocated corporate activity26,349 15,726 191 4,993 3,104 50,363 
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal Consolidated
Nine months ended September 30, 2023
Revenues$406,593 $226,916 $51,140 $85,974 $162,642 $933,265 
Gain on derivatives(2,086)(788)(60)(374)— (3,308)
Interest expense, net of interest income4,701 864 539 10,549 1,515 18,168 
Depreciation and amortization of intangible assets19,784 3,688 1,222 18,741 2,618 46,053 
Unallocated corporate activity— — — — — (56,354)
Income before taxes, excluding unallocated corporate activity33,401 26,227 3,027 7,445 6,514 76,614 
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal Consolidated
Nine Months Ended September 30, 2022
Revenues$983,111 $276,198 $43,999 $87,874 $101,513 $1,492,695 
(Gain) loss on derivatives(363)— (25)163 — (225)
Interest expense, net of interest income5,219 927 731 6,572 (73)13,376 
Depreciation and amortization of intangible assets15,876 3,677 1,297 17,458 729 39,037 
Unallocated corporate activity— — — — — (52,553)
Income before taxes, excluding unallocated corporate activity77,407 36,623 1,482 18,891 8,952 143,355 
See Note 3 for additional information about our revenues by product line.