Commitments and Contingencies (Cole Litigation Matters) (Detail) (USD $)	0 Months Ended
	Jul. 31, 2014	Apr. 30, 2013 Lawsuits	Sep. 30, 2014 Lawsuits
Loss Contingencies [Line Items]
Plaintiff reimbursed amount	$ 100,000
Breach of Fiduciary Duty, Abuse of Control, Corporate Waste, Unjust Enrichment, Aiding and Abetting Breach of Fiduciary Duty and Other Claims Relating to the Merger [Member] | Putative Class Action [Member] | Stayed Litigation [Member]
Loss Contingencies [Line Items]
Number of lawsuits		3
Claims Under The Securities Act of 1933 [Member] | Class Action [Member] | Stayed Litigation [Member]
Loss Contingencies [Line Items]
Number of lawsuits		2
Breach of Fiduciary Duty [Member] | Class Action Versus American Realty Capital Properties, Cole and Cole Board of Directors [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of lawsuits			11