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

Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Liabilities
Contingent consideration	$ 1,465	$ 3,800
Recurring
Liabilities
Total liabilities	8,106	9,515
Recurring \| Level 2 \| Interest rate swap instruments
Assets
Asset derivatives	3,970	5,202
Liabilities
Liability derivatives	629	9
Recurring \| Level 2 \| Make-whole provisions
Liabilities
Liability derivatives	6,012	5,348
Recurring \| Level 3
Liabilities
Contingent consideration	$ 1,465	$ 4,158