Organization (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended				6 Months Ended	12 Months Ended
	Jun. 18, 2012	Nov. 02, 2011	Nov. 07, 2011	Sep. 06, 2011	Jun. 30, 2012	Dec. 31, 2011
Operations [Line Items]
Common stock, shares issued	3,250,000	1,500,000	100,000	5,600,000	10,676,117	7,323,434
ARC Properties Operating Partnership, L.P. [Member]
Operations [Line Items]
General partner ownership interest in OP, Percent					92.30%
ARC Properties Operating Partnership, L.P. [Member] | ARC Real Estate Partners, LLC [Member]
Operations [Line Items]
Limited partner ownership interest in OP, Percent					2.70%
Setzer Properties [Member] | Setzer Properties [Member]
Operations [Line Items]
Limited partner ownership interest in OP, Percent					5.00%
Common Stock [Member]
Operations [Line Items]
Proceeds from Issuance of Common Stock	$ 30.0	$ 14.4	$ 0.7	$ 66.0	$ 108.1	$ 78.1