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Business Segment Information
 9 Months Ended
Sep. 30, 2022
Segment Reporting [Abstract]  
Business Segment Information BUSINESS SEGMENT INFORMATION
Our reportable segments for the three and nine months ended September 30, 2022 were U.S. Regions, U.S. Federal, Canada, Alternative Fuels (formerly Non-Solar Distributed Generation (“Non-Solar DG”)) and All Other. On January 1, 2022, we changed the structure of our internal organization and our “All Other” segment now includes our U.S.-based enterprise energy management services previously included in our U.S Regions segment and our U.S. Regions segment now includes U.S. project revenue and associated costs previously included in our former Non-Solar DG segment. As a result, previously reported amounts have been reclassified for comparative purposes.
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, 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 
Three Months Ended September 30, 2021
Revenues$107,711 $96,656 $11,658 $28,238 $29,419 $273,682 
(Gain) loss on derivatives(1,392)— (286)2,345 — 667 
Interest expense, net of interest income1,621 324 233 1,834 92 4,104 
Depreciation and amortization of intangible assets3,947 1,237 493 5,669 357 11,703 
Unallocated corporate activity— — — — — (11,547)
Income before taxes, excluding unallocated corporate activity10,499 15,150 270 3,595 1,121 30,635 

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 
Nine Months Ended September 30, 2021
Revenues$314,978 $289,068 $34,176 $80,031 $81,551 $799,804 
(Gain) loss on derivatives(1,021)— (152)3,065 — 1,892 
Interest expense, net of interest income4,517 971 653 3,651 328 10,120 
Depreciation and amortization of intangible assets11,375 3,386 1,393 15,467 1,097 32,718 
Unallocated corporate activity— — — — — (32,666)
Income before taxes, excluding unallocated corporate activity21,456 38,262 1,005 17,083 4,574 82,380 
See Note 3 for additional information about our revenues by product line.