Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Feb. 27, 2015
Document Information [Line Items]
Document Type	10-Q/A
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
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		905,338,684
ARC Properties Operating Partnership, L.P. [Member]
Document Information [Line Items]
Entity Registrant Name	ARC PROPERTIES OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	0001528059