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Organization (Details)
12 Months Ended
Dec. 31, 2014
segment
Real Estate Properties [Line Items]  
Number of reportable segments 2us-gaap_NumberOfReportableSegments
ARC Properties Operating Partnership, L.P. [Member]  
Real Estate Properties [Line Items]  
Partnership units, holding period until right to redeem 1 year
General Partner [Member]  
Real Estate Properties [Line Items]  
General partner ownership interest in OP, Percent 97.40%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
Limited Partner [Member] | ARC Properties Operating Partnership, L.P. [Member]  
Real Estate Properties [Line Items]  
Limited partner ownership interest in OP, Percent 2.60%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
/ dei_LegalEntityAxis
= arcp_AmericanRealtyCapitalPropertiesOperatingPartnershipL.P.Member
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember