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Organization (Detail)
 3 Months Ended
Mar. 31, 2014
Unaffiliated Third Party [Member]  
Operations [Line Items]  
Limited partner ownership interest in OP, Percent 0.60%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= arcp_UnaffiliatedThirdPartyMember
ARC Properties Operating Partnership, L.P. [Member]  
Operations [Line Items]  
Partnership units, holding period until right to redeem 1 year
ARC Properties Operating Partnership, L.P. [Member] | General Partner [Member]  
Operations [Line Items]  
General partner ownership interest in OP 96.90%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
/ dei_LegalEntityAxis
= arcp_ArcPropertiesOperatingPartnershipLPMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
ARC Real Estate Partners, LLC [Member] | Affiliated Entity [Member] | Contributor [Member]  
Operations [Line Items]  
Limited partner ownership interest in OP, Percent 2.50%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
/ dei_LegalEntityAxis
= arcp_ArcRealEstatePartnersLlcMember
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arcp_ContributorMember