Ameresco, Inc. Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets, Net - Additional Information (Details)

v3.24.0.1

Goodwill and Intangible Assets, Net - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2023 reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Goodwill [Line Items]
Number of Reporting units impaired \| reporting_unit	1
Percentage of fair value that was less than carrying value	2.00%	2.00%
Asset impairments		$ 1,644,000	$ 0	$ 0
Goodwill impairment net of tax		$ 2,222,000	$ 0	$ 0
Percentage of fair value that was less than carrying value	16.00%	16.00%	20.00%
Minimum
Goodwill [Line Items]
Intangible assets amortization period	1 year	1 year
Minimum \| Customer contracts
Goodwill [Line Items]
Intangible assets amortization period	1 year	1 year
Minimum \| Customer relationships, noncompete agreements, technology and trade names
Goodwill [Line Items]
Intangible assets amortization period	4 years	4 years
Maximum
Goodwill [Line Items]
Intangible assets amortization period	15 years	15 years
Maximum \| Customer contracts
Goodwill [Line Items]
Intangible assets amortization period	8 years	8 years
Maximum \| Customer relationships, noncompete agreements, technology and trade names
Goodwill [Line Items]
Intangible assets amortization period	15 years	15 years

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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