Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Feb. 27, 2015	Jun. 30, 2013
Document And Entity Information [Abstract]
Document Type	10-K/A
Amendment Flag	true
AmendmentDescription	This Amendment No. 3 on Form 10-K/A (this “Amendment No. 3”) amends our Annual Report on Form 10-K for the fiscal year ended December 31, 2013 that was filed with the U.S. Securities and Exchange Commission (“SEC”) on February 27, 2014 and amended by Amendment No. 1 thereto on Form 10-K/A filed with the SEC on September 4, 2014 and Amendment No. 2 thereto on Form 10-K/A filed with the SEC on March 2, 2015 (the “Amended Filing”). We are filing this Amendment No. 3 to update Part IV and provide Exhibit 101 to the Amended Filing. Except as set forth in Part IV 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. 3 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	Dec. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Trading Symbol	ARCP
Entity Registrant Name	AMERICAN REALTY CAPITAL PROPERTIES, INC.
Entity Central Index Key	0001507385
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		905,338,684
Entity Public Float			$ 2.78