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Preferred and Common Stock (Detail) (USD $)
 0 Months Ended 9 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Oct. 23, 2013
May 28, 2013
Mar. 17, 2013
Nov. 29, 2012
Jun. 27, 2012
Mar. 16, 2012
Feb. 27, 2012
Sep. 07, 2011
Sep. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jan. 01, 2017
Jan. 29, 2013
Jun. 18, 2012
Nov. 02, 2011
Jul. 09, 2012
Nov. 07, 2011
Nov. 12, 2013
Jun. 07, 2013
Jan. 03, 2014
Apr. 04, 2014
Dec. 09, 2013
Sep. 15, 2013
Aug. 21, 2013
Jul. 02, 2013
Dec. 31, 2010
Feb. 28, 2013
Nov. 08, 2013
Mar. 02, 2015
Class of Stock [Line Items]                                                              
Shares converted into common stock                     829,629us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities                                        
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare [1]                   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare [1] $ 0.01us-gaap_CommonStockParOrStatedValuePerShare [1]                     $ 0.01us-gaap_CommonStockParOrStatedValuePerShare   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare            
Proceeds from issuances of preferred shares                     $ 0us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock [1] $ 9,000,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock [1] $ 0us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock                                    
Proceeds from issuances of common stock                     2,158,486,000us-gaap_ProceedsFromIssuanceOfCommonStock [1] 1,909,520,000us-gaap_ProceedsFromIssuanceOfCommonStock [1] 122,993,000us-gaap_ProceedsFromIssuanceOfCommonStock                                    
Dividends declared, in dollars per share $ 0.940us-gaap_CommonStockDividendsPerShareDeclared $ 1.000us-gaap_CommonStockDividendsPerShareDeclared [2] $ 0.940us-gaap_CommonStockDividendsPerShareDeclared [3] $ 0.910us-gaap_CommonStockDividendsPerShareDeclared $ 0.900us-gaap_CommonStockDividendsPerShareDeclared $ 0.890us-gaap_CommonStockDividendsPerShareDeclared $ 0.885us-gaap_CommonStockDividendsPerShareDeclared $ 0.880us-gaap_CommonStockDividendsPerShareDeclared $ 0.875us-gaap_CommonStockDividendsPerShareDeclared $ 0.895us-gaap_CommonStockDividendsPerShareDeclared                                          
Common stock, shares authorized 1,500,000,000us-gaap_CommonStockSharesAuthorized [1]                   1,500,000,000us-gaap_CommonStockSharesAuthorized [1] 240,000,000us-gaap_CommonStockSharesAuthorized [1]                       1,500,000,000us-gaap_CommonStockSharesAuthorized     750,000,000us-gaap_CommonStockSharesAuthorized        
Maximum Amount of Offering from Universal Shelf Registration Statement 500,000,000arcp_MaximumAmountOfOfferingFromUniversalShelfRegistrationStatement                   500,000,000arcp_MaximumAmountOfOfferingFromUniversalShelfRegistrationStatement                                        
Issuances of common stock                     47,161,562us-gaap_StockIssuedDuringPeriodSharesNewIssues [4],[5] 3,737,500us-gaap_StockIssuedDuringPeriodSharesNewIssues [5],[6] 7,147,034us-gaap_StockIssuedDuringPeriodSharesNewIssues [5],[7]                                    
Stock Repurchase Program, Authorized Amount                                                   250,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1          
Number of Shares                     600,000us-gaap_StockRepurchasedDuringPeriodShares                                        
Stock Repurchased During Period, Price Per Share $ 13.07arcp_StockRepurchasedDuringPeriodPricePerShare                   $ 13.07arcp_StockRepurchasedDuringPeriodPricePerShare                                        
Common stock repurchases                     7,500,000us-gaap_StockRepurchasedDuringPeriodValue                                        
Registration Payment Arrangement, Arrangement [Domain]                                                              
Class of Stock [Line Items]                                                              
Common stock, shares authorized 1,882,248us-gaap_CommonStockSharesAuthorized
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_RegistrationPaymentArrangementArrangementDomain		                   1,882,248us-gaap_CommonStockSharesAuthorized
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_RegistrationPaymentArrangementArrangementDomain		                                        
At the Market Offering [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                           8,900,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_AtMarketOfferingMember		                                  
Maximum Amount of Offering from Universal Shelf Registration Statement 60,000,000arcp_MaximumAmountOfOfferingFromUniversalShelfRegistrationStatement
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_AtMarketOfferingMember		                   60,000,000arcp_MaximumAmountOfOfferingFromUniversalShelfRegistrationStatement
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_AtMarketOfferingMember		                                        
Issuances of common stock                           553,300us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_AtMarketOfferingMember		 [5]                                  
IPO [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                 67,400,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_IPOMember		                                            
Issuances of common stock                 5,574,131us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_IPOMember		 [5]                                            
Follow On Offering [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                             26,800,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		 30,300,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		 15,800,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		                            
Issuances of common stock                             2,070,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		 [5] 3,250,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		 [5] 1,497,924us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_FollowOnOfferingMember		 [5]                            
Underwriters Over Allotment [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                                   4,600,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_UnderwritersOverAllotmentMember		 800,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_UnderwritersOverAllotmentMember		                        
Issuances of common stock                                   487,500us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_UnderwritersOverAllotmentMember		 [5] 74,979us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= arcp_UnderwritersOverAllotmentMember		 [5]                        
Private Placement [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                                       186,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_PrivatePlacementMember		 455,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_PrivatePlacementMember		                    
Issuances of common stock                                       15,126,498us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_PrivatePlacementMember		 [5] 29,411,764us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ arcp_TypeOfCommonStockOfferingAxis
= us-gaap_PrivatePlacementMember		 [5]                    
Common Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Issuances of common stock                     78,215,719us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 164,775,688us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 16,929,184us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		                                    
Number of Shares                     28,319,972us-gaap_StockRepurchasedDuringPeriodShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 183,119us-gaap_StockRepurchasedDuringPeriodShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1]                                      
Common stock repurchases                     283,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 2,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1]                                      
Shares, Outstanding 239,234,725us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1]                   239,234,725us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 184,553,676us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 [1] 17,162,016us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		                             20,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		      
ARCT IV / ARCP Merger [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                     1,500,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIVARCPMergerMember		 255,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIVARCPMergerMember		                                      
Issuances of common stock                     31,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIVARCPMergerMember		 5,400,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIVARCPMergerMember		                                      
ARCT III [Member]                                                              
Class of Stock [Line Items]                                                              
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		                   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		                                        
Proceeds from issuances of common stock                       1,600,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		 102,200,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		                                    
Issuances of common stock                       155,700,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		 9,800,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		                                    
Common Stock Outstanding After Share Exchange                                                         140,700,000arcp_CommonStockOutstandingAfterShareExchange
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		    
Percentage of Total Outstanding Shares                                                         16.50%arcp_PercentageofTotalOutstandingShares
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		    
Business Acquisition, Share Price                                                         $ 12.00us-gaap_BusinessAcquisitionSharePrice
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		    
Shares Based on Exchange Ratio                                                         27,700,000arcp_SharesBasedonExchangeRatio
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember		    
ARCT III [Member] | Option One [Member] | Common Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Common Stock Outstanding After Share Exchange                                                         140,700,000arcp_CommonStockOutstandingAfterShareExchange
/ us-gaap_BusinessAcquisitionAxis
= arcp_ARCTIIIMember
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_CommonStockMember
/ arcp_MutuallyExclusiveOptionAxis
= arcp_OptionOneMember		    
ARCP Merger [Member] | Option Two [Member] | Cash [Member]                                                              
Class of Stock [Line Items]                                                              
Shares, Outstanding                                                         29,200,000us-gaap_SharesOutstanding
/ us-gaap_BusinessAcquisitionAxis
= arcp_ArcpMergerMember
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_CashMember
/ arcp_MutuallyExclusiveOptionAxis
= arcp_OptionTwoMember		    
ARCP Merger [Member] | Option One [Member] | Common Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Shares, Outstanding                                                         148,100,000us-gaap_SharesOutstanding
/ us-gaap_BusinessAcquisitionAxis
= arcp_ArcpMergerMember
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= us-gaap_CommonStockMember
/ arcp_MutuallyExclusiveOptionAxis
= arcp_OptionOneMember		    
ARCP [Member]                                                              
Class of Stock [Line Items]                                                              
Proceeds from issuances of common stock                     676,700,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_SaleOfStockAxis
= arcp_ArcpMember		 [4] 34,900,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_SaleOfStockAxis
= arcp_ArcpMember		 [6] 84,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ arcp_SaleOfStockAxis
= arcp_ArcpMember		 [7]                                    
Shares Issued under the universal shelf registration | Common Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Issuances of common stock                     2,100,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_StatementScenarioAxis
= arcp_SharesIssuedUndertheUniversalShelfRegistrationMember		                                        
Series A Convertible Preferred Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Convertible preferred stock, outstanding 545,454us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		                   545,454us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember		                                        
Series B Convertible Preferred Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Convertible preferred stock, outstanding 283,018us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember		                   283,018us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember		                                        
Series D preferred stock [Member]                                                              
Class of Stock [Line Items]                                                              
Convertible preferred stock, outstanding 21,735,008us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1]                   21,735,008us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1] 0us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1]                                      
Convertible preferred stock, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1]                   $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1] $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		 [1]                         $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		            
Shares to be Issued                                       21,700,000arcp_SharestobeIssued
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                      
Proceeds from issuances of preferred shares                                       288,000,000us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                      
Preferred Stock, Dividend Rate, Percentage                                       5.81%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                      
Preferred Stock, Redemption Price Per Share                                       $ 13.59us-gaap_PreferredStockRedemptionPricePerShare
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                      
Dividends declared, in dollars per share                                       $ 0.79us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                      
Preferred Stock, Liquidation Preference Per Share                                                           $ 13.59us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Preferred Stock, Liquidation Preference, Additional Premium                                                           20.00%arcp_PreferredStockLiquidationPreferenceAdditionalPremium
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Preferred Stock, Redemption Terms, Liquidation Preference, Percent                                                           102.00%arcp_PreferredStockRedemptionTermsLiquidationPreferencePercent
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Preferred Stock, Redemption Terms, Volume Weighted Average Price, Percent                                                           102.00%arcp_PreferredStockRedemptionTermsVolumeWeightedAveragePricePercent
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Preferred Stock, Conversion Terms, Volume Weighted Average Price Of Common Stock                                                           2.00%arcp_PreferredStockConversionTermsVolumeWeightedAveragePriceOfCommonStock
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Preferred Stock, Conversion Terms, Discount on Closing Price on Conversion Election Date, Percentage                                                           2.00%arcp_PreferredStockConversionTermsDiscountonClosingPriceonConversionElectionDatePercentage
/ us-gaap_StatementClassOfStockAxis
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Preferred Stock, Conversion Terms, Volume Weighted Average Price, Percent                                                           102.00%arcp_PreferredStockConversionTermsVolumeWeightedAveragePricePercent
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		  
Embedded Derivative, Fair Value of Embedded Derivative, Net 16,700,000us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeNet
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                   16,700,000us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeNet
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= arcp_ConvertiblePreferredSeriesDStockMember		                           18,700,000us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeNet
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Embedded Derivative, Gain (Loss) on Embedded Derivative, Net                     2,000,000us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet
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= arcp_ConvertiblePreferredSeriesDStockMember		                                        
Convertible preferred stock                                                 269,300,000arcp_PreferredStockFairValue
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 21,735,008us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_StatementClassOfStockAxis
= arcp_ConvertiblePreferredSeriesDStockMember		                   21,735,008us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
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= arcp_ConvertiblePreferredSeriesDStockMember		                                        
Series D preferred stock [Member] | Subsequent Event [Member]                                                              
Class of Stock [Line Items]                                                              
Convertible preferred stock, outstanding                                                             0us-gaap_PreferredStockSharesOutstanding
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Common Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Shares to be Issued                                       15,100,000arcp_SharestobeIssued
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= us-gaap_CommonStockMember		                      
Proceeds from issuances of common stock                                       $ 186,000,000us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember		                      
Common Stock [Member] | Subsequent Event [Member] | ARCT IV / ARCP Merger [Member]                                                              
Class of Stock [Line Items]                                                              
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares                                           36,900,000us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
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Series F Preferred Stock [Member]                                                              
Class of Stock [Line Items]                                                              
Preferred Stock, Redemption Price Per Share $ 25.00us-gaap_PreferredStockRedemptionPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember		                   $ 25.00us-gaap_PreferredStockRedemptionPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember		                                        
Dividends declared, in dollars per share                     $ 1.675us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_StatementClassOfStockAxis
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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 42,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
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Series F Preferred Stock [Member] | ARCT IV / ARCP Merger [Member]                                                              
Class of Stock [Line Items]                                                              
Percentage of Stock, Designated Cumulative Preferred Stock                                           6.70%arcp_PercentageofStockDesignatedCumulativePreferredStock
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Series F Preferred Stock [Member] | Subsequent Event [Member] | ARCT IV / ARCP Merger [Member]                                                              
Class of Stock [Line Items]                                                              
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares                                           42,200,000us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
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Percentage of Stock, Designated Cumulative Preferred Stock                                           6.70%arcp_PercentageofStockDesignatedCumulativePreferredStock
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Series F Preferred Stock [Member] | Subsequent Event [Member] | ARCT IV / ARCP Merger [Member] | ARCP IV [Member]                                                              
Class of Stock [Line Items]                                                              
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[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.
[2] The dividend increase was contingent upon, and became effective with, the close of the Cole Merger, which was consummated on February 7, 2014.
[3] The dividend increase became effective at the close of the CapLease Merger, which was consummated on November 5, 2013.
[4] Excludes 31.0 million shares of common stock that were issued by ARCT IV for gross proceeds of $1.5 billion.
[5] Excludes 140.7 million shares of common stock that were issued to the stockholders of ARCT III's common stock in conjunction with the ARCT III Merger.
[6] Excludes 155.7 million and 5.4 million shares of common stock that were issued by ARCT III and ARCT IV, respectively, for gross proceeds of $1.6 billion and $255.0 million, respectively.
[7] Excludes 9.8 million shares of common stock that were issued by ARCT III for gross proceeds of $102.2 million.