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Geographic Information
 12 Months Ended
Dec. 31, 2021
Segments, Geographical Areas [Abstract]  
Geographic Information GEOGRAPHIC INFORMATION
The following table presents our long-lived assets related to our operations by geographic area:
As of December 31,
 2021 2020
Long-lived Assets   
United States$839,231  $706,177 
Canada2,453 29,768
Other27,964 2,415 
Total long-lived assets$869,648  $738,360 
We attribute revenues to customers based on the location of the customer. The following table presents revenues by geographic region:
Year Ended December 31,
202120202019
Revenues 
United States$1,126,141 $955,436 $815,405 
Canada45,78245,08935,031
Other43,774 31,750 16,497 
Total revenues$1,215,697 $1,032,275 $866,933 
BUSINESS SEGMENT INFORMATION
Our reportable segments for the year ended December 31, 2021 were U.S. Regions, U.S. Federal, Canada, Non-Solar Distributed Generation (“Non-Solar DG”), and All Other. On January 1, 2021, we changed the structure of our internal organization, and our U.S. Regions segment now includes our U.S.-based enterprise energy management services previously included in our “All Other” 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 which include the 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 Non-Solar DG segment sells electricity, processed renewable gas fuel, heat or cooling, produced from renewable sources of energy, other than solar, and generated by small-scale plants that we own and O&M services for customer owned small-scale plants. Our U.S. Regions segment also includes certain small-scale solar grid-tie plants developed for customers. The “All Other” category offers enterprise energy management services, 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.
For the years ended December 31, 2021, 2020, and 2019 more than 67% of our revenues have been derived from federal, state, provincial, or local government entities, including public housing authorities and public universities. The U.S. federal government, which is considered a single customer for reporting purposes, constituted 32.3%, 36.6%, and 33.2% of our
consolidated revenues for the years ended December 31, 2021, 2020, and 2019, respectively. Revenues from the U.S. federal government are included in our U.S. Federal segment. Other than the U.S. federal government, one customer represented 10.2% of our revenues during the year ended December 31, 2021 and revenues from this customer is included in our U.S. Regions segment.
The reports of our chief operating decision maker do not include assets at the operating segment level.
The table below presents our business segment information and reconciliation to our consolidated financial statements:
 U.S. Regions U.S. Federal Canada Non-Solar DG All Other Total Consolidated
2021
Revenues$528,293 $392,948 $49,457 $137,243 $107,756 $1,215,697 
(Gain) loss on derivatives(1,017)— (73)1,330 — 240 
Net interest expense6,255 1,294 879 5,793 327 14,548 
Depreciation and intangible asset amortization16,057 4,666 1,872 21,080 1,081 44,756 
Unallocated corporate activity— — — — — (48,417)
Income before taxes, excluding unallocated corporate activity40,051 52,386 1,584 26,345 6,195 126,561 
2020
Revenues404,152 377,882 47,797 106,417 96,027 1,032,275 
(Gain) loss on derivatives(744)— 153 (114)— (705)
Net interest expense6,392 1,694 699 4,467 95 13,347 
Depreciation and intangible asset amortization12,627 3,945 1,580 20,717 1,268 40,137 
Unallocated corporate activity— — — — — (40,188)
Income before taxes, excluding unallocated corporate activity28,339 44,560 2,560 13,040 8,117 96,616 
2019
Revenues369,248 287,426 37,919 84,683 87,657 866,933 
Gain on derivatives(890)— — (178)— (1,068)
Net interest expense6,582 623 691 5,338 (68)13,166 
Depreciation and intangible asset amortization10,318 3,427 1,397 21,359 1,208 37,709 
Unallocated corporate activity— — — — — (34,188)
Income before taxes, excluding unallocated corporate activity18,536 40,553 562 3,813 7,277 70,741 
See Note 3 for additional information about our revenues by product line.