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REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional Information (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Revenue from Contract with Customer [Abstract] |  |
Contract with customer, asset, reclassified to receivable | $ 320,530,000 | $ 210,475,000
Contract with customer, asset, revenue recognized | 225,443,000 | 203,216,000
Revenue recognized | 98,936,000 | 60,748,000
Contract with customer, liability, billings | 75,835,000 | 46,306,000
Revenue, remaining performance obligation | $ 3,968,172,000 |
Contract term | 27 years |
Capitalized contract cost, project development costs | $ 4,436,000 | 3,120,000
Capitalized contract cost, impairment loss | $ 0 | $ 0

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- Definition Capitalized Contract Cost, Project Development Costs + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Contract With Customer, Asset, Revenue Recognized + References No definition available. + Details
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Namespace Prefix: | amrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Contract With Customer, Liability, Billings + References No definition available. + Details
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Namespace Prefix: | amrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract With Customer, Liability, Including New Contract Revenue, Recognized + References No definition available. + Details
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Namespace Prefix: | amrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Revenue From Contract With Customer, Contract Term + References No definition available. + Details
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Data Type: | xbrli:durationItemType
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- Definition Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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- Definition Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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