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

Goodwill and Intangible Assets, Net - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 690	$ 442	$ 1,681	$ 1,462
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	0	138	0	459
All other intangible assets
Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 690	$ 304	$ 1,681	$ 1,003