Document and Entity Information	12 Months Ended
	Dec. 31, 2012
Entity Information [Line Items]
Entity Registrant Name	AMERICAN REALTY CAPITAL PROPERTIES, INC.
Entity Central Index Key	0001507385
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	8-K/A
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes