Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies- Solar Tariff Contingency (Details)

v2.4.1.9
Commitments and Contingencies- Solar Tariff Contingency (Details) (Unfavorable Regulatory Action)
 1 Months Ended 6 Months Ended
Oct. 31, 2012
Mar. 31, 2015
Dec. 31, 2014
Loss Contingencies [Line Items]      
Anti-dumping duty rate (percent)   31.18%amrc_SolarTariffAntiDumpingDutyRate  
Solar tariff, countervailing duty rate prior to increase (percent)     3.61%amrc_SolarTariffCountervailingDutyRatePriorToIncrease
Solar tariff, countervailing duty rate (percent) 15.24%amrc_SolarTariffCountervailingDutyRate    
Maximum
      
Loss Contingencies [Line Items]      
Anti-dumping duty rate (percent) 249.96%amrc_SolarTariffAntiDumpingDutyRate
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_UnfavorableRegulatoryActionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember