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Contract Rights Under Development Agreements and Customer Agreements (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Contract Rights Under Development Agreements And Customer Agreements [Abstract]    
Accretion of contract rights under development agreements and customer agreements $ 55,000apgh_AccretionOfContractRightsUnderDevelopmentAgreementsAndCustomerAgreements $ 12,000,000apgh_AccretionOfContractRightsUnderDevelopmentAgreementsAndCustomerAgreements