|
Business Acquisitions and Related Transactions - Narrative (Details) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
1 Months Ended |
12 Months Ended |
1 Months Ended |
12 Months Ended |
|
Dec. 31, 2014
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Aug. 31, 2014
|
Jun. 30, 2013
business
|
Dec. 31, 2013
|
Feb. 28, 2013
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Jul. 31, 2012
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Dec. 31, 2012
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| Business Acquisition [Line Items] |
|
|
|
|
|
|
|
| Weighted average useful life |
8 years 2 months 12 days
|
|
|
|
|
|
|
| EEX |
|
|
|
|
|
|
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| Business Acquisition [Line Items] |
|
|
|
|
|
|
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| Initial cash payment |
|
$ 9,054us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= amrc_EEXMember
|
|
|
|
|
|
| Security deposit with third-party escrow agent |
|
834amrc_BusinessAcquisitionCostOfAcquiredEntitySecurityDepositInEscrow
/ us-gaap_BusinessAcquisitionAxis
= amrc_EEXMember
|
|
|
|
|
|
| Purchase price |
13,904us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= amrc_EEXMember
|
|
|
|
|
|
|
| Total fair value of consideration |
13,904us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= amrc_EEXMember
|
|
|
|
|
|
|
| ESP |
|
|
|
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
|
|
|
| Security deposit with third-party escrow agent |
|
|
778amrc_BusinessAcquisitionCostOfAcquiredEntitySecurityDepositInEscrow
/ us-gaap_BusinessAcquisitionAxis
= amrc_ESPMember
|
|
|
|
|
| Number of businesses acquired |
|
|
2us-gaap_NumberOfBusinessesAcquired
/ us-gaap_BusinessAcquisitionAxis
= amrc_ESPMember
|
|
|
|
|
| Purchase price |
|
|
8,765us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= amrc_ESPMember
|
10,531us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= amrc_ESPMember
|
|
|
|
| Total fair value of consideration |
|
|
|
10,531us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= amrc_ESPMember
|
|
|
|
| Ennovate |
|
|
|
|
|
|
|
| Business Acquisition [Line Items] |
|
|
|
|
|
|
|
| Security deposit with third-party escrow agent |
|
|
|
|
1,200amrc_BusinessAcquisitionCostOfAcquiredEntitySecurityDepositInEscrow
/ us-gaap_BusinessAcquisitionAxis
= amrc_EnnovateMember
|
|
|
| Total fair value of consideration |
|
|
|
|
1,766us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= amrc_EnnovateMember
|
|
|
| FAME |
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|
|
|
|
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| Business Acquisition [Line Items] |
|
|
|
|
|
|
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| Initial cash payment |
|
|
|
|
|
4,487us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= amrc_FameFacilitySoftwareSolutionsIncMember
|
|
| Security deposit with third-party escrow agent |
|
|
|
|
|
900amrc_BusinessAcquisitionCostOfAcquiredEntitySecurityDepositInEscrow
/ us-gaap_BusinessAcquisitionAxis
= amrc_FameFacilitySoftwareSolutionsIncMember
|
|
| Purchase price |
|
|
|
|
|
|
4,487us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= amrc_FameFacilitySoftwareSolutionsIncMember
|
| Total fair value of consideration |
|
|
|
|
|
|
$ 4,487us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= amrc_FameFacilitySoftwareSolutionsIncMember
|