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Property Dispositions (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of real estate properties, held for sale 1arcp_NumberOfRealEstatePropertiesHeldForSale
2014 Property Dispositions [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Discontinued operations, gross sales price $ 96.4us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= arcp_PropertyDispositions2014Member
Single Tenant Properties [Member] | 2014 Property Dispositions [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of real estate properties disposed of 24arcp_NumberofRealEstatePropertiesDisposedOf
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= arcp_PropertyDispositions2014Member
/ us-gaap_RelatedPartyTransactionAxis
= arcp_SingleTenantPropertiesMember
Multi Tenant Properties [Member] | 2014 Property Dispositions [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Number of real estate properties disposed of 1arcp_NumberofRealEstatePropertiesDisposedOf
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= arcp_PropertyDispositions2014Member
/ us-gaap_RelatedPartyTransactionAxis
= arcp_MultiTenantPropertiesMember