    <SEC-DOCUMENT>0001488139-23-000047-index.html : 20230424
    <SEC-HEADER>0001488139-23-000047.hdr.sgml : 20230424
    <ACCEPTANCE-DATETIME>20230424162320
    ACCESSION NUMBER:		0001488139-23-000047
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		38
    CONFORMED PERIOD OF REPORT:	20230418
    ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20230424
    DATE AS OF CHANGE:		20230424

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Ameresco, Inc.
    		CENTRAL INDEX KEY:			0001488139
    		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION SPECIAL TRADE CONTRACTORS [1700]
    		IRS NUMBER:				043512838
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34811
    		FILM NUMBER:		23840383

    	BUSINESS ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    		BUSINESS PHONE:		508-661-2200

    	MAIL ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>amrc-20230418.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: amrc-20230418.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>secondamendedandrestated.htm
    <DESCRIPTION>EX-3.1
    <TEXT>
    Document 2 - file: secondamendedandrestated.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>3
    <FILENAME>amrc_20220323x8-kxex9911.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 3 - file: amrc_20220323x8-kxex9911.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>amrc-20230418.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 4 - file: amrc-20230418.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>amrc-20230418_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: amrc-20230418_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>amrc-20230418_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: amrc-20230418_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>amtagrgba02a211a1a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: amtagrgba02a211a1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>secondamendedandrestated001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: secondamendedandrestated001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>secondamendedandrestated002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: secondamendedandrestated002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>secondamendedandrestated003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: secondamendedandrestated003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>secondamendedandrestated004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: secondamendedandrestated004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>secondamendedandrestated005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: secondamendedandrestated005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>secondamendedandrestated006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: secondamendedandrestated006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>secondamendedandrestated007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: secondamendedandrestated007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>secondamendedandrestated008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: secondamendedandrestated008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>secondamendedandrestated009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: secondamendedandrestated009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>secondamendedandrestated010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: secondamendedandrestated010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>secondamendedandrestated011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: secondamendedandrestated011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>secondamendedandrestated012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: secondamendedandrestated012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>secondamendedandrestated013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: secondamendedandrestated013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>secondamendedandrestated014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: secondamendedandrestated014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>secondamendedandrestated015.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: secondamendedandrestated015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>secondamendedandrestated016.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: secondamendedandrestated016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>secondamendedandrestated017.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: secondamendedandrestated017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>secondamendedandrestated018.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: secondamendedandrestated018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>secondamendedandrestated019.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: secondamendedandrestated019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>secondamendedandrestated020.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: secondamendedandrestated020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>secondamendedandrestated021.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: secondamendedandrestated021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>secondamendedandrestated022.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: secondamendedandrestated022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>secondamendedandrestated023.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: secondamendedandrestated023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>31
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 31 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>32
    <FILENAME>amrc-20230418_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 32 - file: amrc-20230418_htm.html

    Document 32 - RAW XML: amrc-20230418_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>33
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 33 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>34
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 34 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>35
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 35 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>36
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 36 - file: FilingSummary.html

    Document 36 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>38
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 38 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>39
    <FILENAME>0001488139-23-000047-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 39 - file: 0001488139-23-000047-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>