Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 28, 2014
Document And Entity Information [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	This Amendment No. 2 on Form 10-Q/A (this “Amendment No. 2”) amends our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2014 that was filed with the U.S. Securities and Exchange Commission (“SEC”) on July 29, 2014 and amended by Amendment No. 1 thereto on Form 10-Q/A filed with the SEC on March 2, 2015 (the “Amended Filing”). We are filing this Amendment No. 2 to update Part II, Item 6 and provide Exhibit 101 to the Amended Filing.Except as set forth in Part II, Item 6 below and in any exhibits attached hereto, no other changes are made to the Amended Filing. The Amended Filing continues to speak as of the date of the Amended Filing. Unless expressly stated, this Amendment No. 2 does not reflect events occurring after the filing date of the Amended Filing, nor does it modify or update in any way the disclosures contained in the Amended Filing.
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Trading Symbol	ARCP
Entity Registrant Name	AMERICAN REALTY CAPITAL PROPERTIES, INC.
Entity Central Index Key	0001507385
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		907,924,095