Ameresco (AMRC) 10-K/A 11 Mar 24 2023 FY Annual report (amended) Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 23, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3512838
Entity Emerging Growth Company	false
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Entity File Number	001-34811
Entity Registrant Name	Ameresco, Inc.
City Area Code	508
Local Phone Number	661-2200
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,550,437,708
Entity Address, City or Town	Framingham
Entity Address, State or Province	MA
Entity Address, Address Line One	111 Speen Street
Entity Address, Address Line Two	Suite 410
Entity Address, Postal Zip Code	01701
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Information [Line Items]
Entity Central Index Key	0001488139
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3512838
Entity Address, City or Town	Framingham
Entity Address, State or Province	MA
Entity Address, Address Line One	111 Speen Street
Entity Address, Address Line Two	Suite 410
Entity Address, Postal Zip Code	01701
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	AMRC
Security Exchange Name	NYSE
Auditor Firm ID	49
Auditor Location	Boston, Massachusetts
Auditor Name	RSM US LLP
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		34,282,945
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		18,000,000