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Other Debt - Convertible Obligations to Series C Convertible Preferred Stock (Detail) (USD $)
0 Months Ended 12 Months Ended
Nov. 12, 2013
Jun. 07, 2013
Dec. 31, 2013
Nov. 12, 2013
Jun. 07, 2013
Schedule of Held-to-maturity Securities [Line Items]          
Cash Paid on Conversion of Stock, for Shares Unable to be Converted 441,400,000arcp_CashPaidonConversionofStockforSharesUnabletobeConverted        
Conversion of Stock, Amount Converted 458,800,000us-gaap_ConversionOfStockAmountConverted1        
Conversion of Stock, Loss on Conversion     13,800,000arcp_ConversionofStockLossonConversion    
Series C Preferred Stock [Member]          
Schedule of Held-to-maturity Securities [Line Items]          
Convertible preferred stock, issued   28,400,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
    28,400,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
Stock Issued During Period, Value, New Issues   $ 445,000,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
$ 445,000,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
   
Common stock issued through dividend reinvestment plan (in shares) 1,100,000us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
       
Number of Shares Unable to be Converted 27,300,000arcp_NumberofSharesUnabletobeConverted
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
    27,300,000arcp_NumberofSharesUnabletobeConverted
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
 
Common Stock [Member]          
Schedule of Held-to-maturity Securities [Line Items]          
Common stock issued through dividend reinvestment plan (in shares) 1,400,000us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember