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

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details
Uncategorized
- Uncategorized Items - amrc-20191231.xml

Goodwill and Intangible Assets - Additional Information (Details)

v3.19.3.a.u2

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Impairment of goodwill	$ 0	$ 0	$ 0
Goodwill	$ 58,414,000	$ 58,332,000	$ 56,135,000
Minimum
Goodwill [Line Items]
Percent of goodwill fair value that exceeds carrying value		20.00%	15.00%
Intangible assets amortization period	1 year
Minimum \| Customer contracts
Goodwill [Line Items]
Intangible assets amortization period	1 year
Minimum \| Customer relationships, noncompete agreements, technology and trade names
Goodwill [Line Items]
Intangible assets amortization period	4 years
Maximum
Goodwill [Line Items]
Intangible assets amortization period	15 years
Maximum \| Customer contracts
Goodwill [Line Items]
Intangible assets amortization period	8 years
Maximum \| Customer relationships, noncompete agreements, technology and trade names
Goodwill [Line Items]
Intangible assets amortization period	15 years
Canada
Goodwill [Line Items]
Goodwill	$ 3,369,000	$ 3,217,000	$ 3,494,000
U.S. Regions
Goodwill [Line Items]
Goodwill	26,705,000	$ 26,370,000	$ 24,759,000
Federal
Goodwill [Line Items]
Goodwill	$ 3,981,000

- Definition

Percent of Goodwill Fair Value that Exceeds Carrying Val

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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