Ameresco, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 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

Summary of Significant Accounting Policies - Sale-Leaseback (Details)

v3.10.0.1

Summary of Significant Accounting Policies - Sale-Leaseback (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) project	Jun. 30, 2017 USD ($) project	Jun. 30, 2018 USD ($) project	Jun. 30, 2017 USD ($) project	Dec. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)
Sale Leaseback Transaction [Line Items]
Number of Solar PV Projects Sold \| project	0		0	1
Sale Price			$ 0	$ 21,454,000
Solar Photovoltaic Projects
Sale Leaseback Transaction [Line Items]
Maximum combined funding amount						$ 100,000,000
Number of Solar PV Projects Sold \| project		4
Sale Price		$ 12,671,000
Deferred Gain Recorded	$ 5,785,000	932,000	5,785,000	932,000	$ 6,173,000
Deferred Loss Recorded	2,090,000	144,000	$ 2,090,000	144,000	$ 2,172,000
Capital Lease Asset/Liability Recorded		$ 5,774,000		5,774,000
Initial Lease Term		20 years
Percentage of fair value threshold, integral equipment			10.00%
Net amortization expense	$ (46,000)	$ (15,000)	$ (105,000)	$ (24,000)
Solar Photovoltaic Projects \| Minimum
Sale Leaseback Transaction [Line Items]
Lease Payment		4,000
Solar Photovoltaic Projects \| Maximum
Sale Leaseback Transaction [Line Items]
Lease Payment		$ 252,000

- Definition

Maximum Combined Funding Amount, Sale Leaseback Transactions

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- Definition

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Sale Leaseback Transaction, Number of Projects Sold

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- Definition

Sale Leaseback Transaction, Term

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- Definition

The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period.

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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.

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- Definition

The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller.

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- Definition

Amount of cash inflow after closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

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The amount of the quarterly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

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