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

Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Narrative (Details)

Long-Term Debt - Narrative (Details) (USD $)				12 Months Ended							12 Months Ended			13 Months Ended		0 Months Ended	12 Months Ended																			12 Months Ended					12 Months Ended						12 Months Ended
Long-Term Debt - Narrative (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011 Revolving Credit Facility	Dec. 31, 2013 Notes Payable to Banks Secured Debt	Nov. 30, 2013 Notes Payable to Banks Secured Debt	Dec. 31, 2012 Notes Payable to Banks Secured Debt	Jun. 30, 2011 Notes Payable to Banks Secured Debt	Dec. 31, 2013 7.299% term note payable in semi-annual installments through March 2013 Term Loan	Dec. 31, 2012 7.299% term note payable in semi-annual installments through March 2013 Term Loan	Mar. 31, 2011 7.299% term note payable in semi-annual installments through March 2013 Term Loan	Dec. 31, 2013 8.673% term loan payable in quarterly installments through December 2015 Term Loan	Dec. 31, 2012 8.673% term loan payable in quarterly installments through December 2015 Term Loan	Feb. 27, 2007 8.673% term loan payable in quarterly installments through December 2015 Term Loan	Mar. 31, 2010 Construction Loans Variable rate construction to term loan payable in quarterly installments through June 2028	Feb. 28, 2009 Construction Loans Variable rate construction to term loan payable in quarterly installments through June 2028	Mar. 31, 2010 Construction Loans Term Loan	Dec. 31, 2013 6.500% term loan payable in monthly installments through October 2017 Term Loan	Dec. 31, 2012 6.500% term loan payable in monthly installments through October 2017 Term Loan	Dec. 31, 2013 7.250% term loan payable in quarterly installments through March 2021 Term Loan	Dec. 31, 2012 7.250% term loan payable in quarterly installments through March 2021 Term Loan	Mar. 31, 2011 7.250% term loan payable in quarterly installments through March 2021 Term Loan	Dec. 31, 2013 6.110% term loan payable in monthly installments through June 2028 Term Loan	Dec. 31, 2012 6.110% term loan payable in monthly installments through June 2028 Term Loan	Mar. 31, 2011 6.110% term loan payable in monthly installments through June 2028 Term Loan	Dec. 31, 2013 Variable rate construction to term loan payable in quarterly installments through December 2024 Variable rate construction to term loan payable in quarterly installments through June 2028	Dec. 31, 2012 Variable rate construction to term loan payable in quarterly installments through December 2024 Variable rate construction to term loan payable in quarterly installments through June 2028	Dec. 31, 2013 Variable rate construction to term loan payable in quarterly installments through December 2024 Term Loan	Dec. 31, 2012 Variable rate construction to term loan payable in quarterly installments through December 2024 Term Loan	Jan. 30, 2006 Variable rate construction to term loan payable in quarterly installments through December 2024 Term Loan Tranche	Dec. 31, 2013 Variable Rate Construction Term Loan Payable in semi annual installments through February 26, 2021 Term Loan One	Dec. 31, 2013 6.345% term loan payable in semi-annual installments through June 2024 Term Loan	Dec. 31, 2012 6.345% term loan payable in semi-annual installments through June 2024 Term Loan	Sep. 28, 2007 6.345% term loan payable in semi-annual installments through June 2024 Term Loan Two	Dec. 31, 2013 Variable rate construction to term loan payable in quarterly installments through June 2028 Term Loan	Dec. 31, 2012 Variable rate construction to term loan payable in quarterly installments through June 2028 Term Loan	Dec. 31, 2013 Minimum 7.299% term note payable in semi-annual installments through March 2013 Term Loan	Dec. 31, 2013 Minimum Construction Loans Term Loan	Dec. 31, 2013 Minimum 7.250% term loan payable in quarterly installments through March 2021 Term Loan	Dec. 31, 2013 Minimum 6.110% term loan payable in monthly installments through June 2028 Term Loan	Dec. 31, 2013 Minimum Variable Rate Construction Term Loan Payable in semi annual installments through February 26, 2021 Term Loan	Dec. 31, 2013 Minimum 6.345% term loan payable in semi-annual installments through June 2024 Term Loan	Dec. 31, 2013 Maximum 7.299% term note payable in semi-annual installments through March 2013 Term Loan	Dec. 31, 2013 Maximum Construction Loans Term Loan	Dec. 31, 2013 Maximum 7.250% term loan payable in quarterly installments through March 2021 Term Loan	Dec. 31, 2013 Maximum 6.110% term loan payable in monthly installments through June 2028 Term Loan	Dec. 31, 2013 Maximum Variable Rate Construction Term Loan Payable in semi annual installments through February 26, 2021 Term Loan	Dec. 31, 2013 Maximum 6.345% term loan payable in semi-annual installments through June 2024 Term Loan
Line of Credit Facility [Line Items]
Current borrowing capacity			$ 60,000,000
Additional borrowing capacity			25,000,000
Amount outstanding				25,714,285		32,857,143
Principal payments due in quarterly installments				1,428,571							217,500					2,424,302	11,312																			597,000	206,211	126,127	0		226,705	638,500	1,239,133	170,891	87,983		1,178,885
Original principal amount							40,000,000			10,000,000			7,250,000		37,905,983	27,867,627	754,587				5,500,089			7,380,068					17,156,395	3,239,734			13,080,607	47,200,000
Number of Tranches																													2
Draws on line of credit														27,867,627
Stated interest rate								7.299%			8.673%						6.50%		7.25%			6.11%								6.345%
Debt Covenant, Minimum EBITDA Requirement					30,000,000	40,000,000
Effective interest rate																									3.498%									3.25%							1.998%
Long-term debt value, carrying value	$ 116,195,436	$ 121,531,687						$ 0	$ 638,000		$ 1,665,649	$ 2,535,649					$ 459,491	$ 553,462	$ 4,257,772	$ 4,745,850		$ 7,028,145	$ 7,778,390		$ 18,557,635	$ 20,517,563	$ 13,251,261	$ 13,991,346			$ 11,059,196	$ 11,596,312		$ 45,261,198	$ 37,800,000					$ 95,909						$ 275,461