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Commitments and Contingencies (CapLease Litigation Matters) (Details)
 0 Months Ended
Aug. 09, 2013
lawsuit
Oct. 08, 2013
Mizani, Carach and Tarver Cases [Member]    
Class of Stock [Line Items]    
Loss Contingency, New Claims Filed, Number 3us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LitigationCaseAxis
= arcp_MizaniCarachandTarverCasesMember		  
CapLease [Member] | Series C Cumulative Preferred Stock [Member] | John Poling Putative Class Action [Member]    
Class of Stock [Line Items]    
Preferred stock, dividend rate, percentage   7.25%us-gaap_PreferredStockDividendRatePercentage
/ dei_LegalEntityAxis
= arcp_CapLeaseInc.Member
/ us-gaap_LitigationCaseAxis
= arcp_JohnPolingPutativeClassActionMember
/ us-gaap_StatementClassOfStockAxis
= arcp_SeriesCCumulativePreferredStockMember
CapLease [Member] | Series B Cumulative Preferred [Member] | John Poling Putative Class Action [Member]    
Class of Stock [Line Items]    
Preferred stock, dividend rate, percentage   8.375%us-gaap_PreferredStockDividendRatePercentage
/ dei_LegalEntityAxis
= arcp_CapLeaseInc.Member
/ us-gaap_LitigationCaseAxis
= arcp_JohnPolingPutativeClassActionMember
/ us-gaap_StatementClassOfStockAxis
= arcp_SeriesBCumulativePreferredMember