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Revenue from Contracts with Customers - Consolidated Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue from Contract with Customer [Abstract] |  |  |
Project development costs recognized | $ 13,051 | $ 15,507 | $ 12,737

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- Definition Capitalized Contract Cost, Project Development Costs + References No definition available. + Details
Name: | amrc_CapitalizedContractCostProjectDevelopmentCosts
Namespace Prefix: | amrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration