Commitments and Contingencies (Litigation) (Narrative) (Details)	1 Months Ended			2 Months Ended	3 Months Ended
	Jan. 31, 2015 USD ($) lawsuit	Dec. 31, 2013 USD ($)	Oct. 31, 2013	Jan. 31, 2015 lawsuit	Feb. 28, 2015 lawsuit	Nov. 30, 2013 lawsuit	Apr. 30, 2013 lawsuit	Mar. 31, 2013 lawsuit
SDNY Derivative Actions [Member]
Loss Contingencies [Line Items]
Number of shareholder derivative actions					6
Circuit Court Baltimore Derivative Actions [Member]
Loss Contingencies [Line Items]
Number of shareholder derivative actions				2
Securities Fraud Action [Member] | Claims Under The Securities Exchange Act of 1934 [Member] | Stayed Litigation [Member]
Loss Contingencies [Line Items]
Number of claims	2			2
John Poling Putative Class Action [Member] | Series B Cumulative Preferred [Member] | CapLease [Member]
Loss Contingencies [Line Items]
Preferred stock, dividend rate			8.375%
John Poling Putative Class Action [Member] | Series C Cumulative Preferred Stock [Member] | CapLease [Member]
Loss Contingencies [Line Items]
Preferred stock, dividend rate			7.25%
Class Action [Member] | Claims Under The Securities Act of 1933 [Member] | Stayed Litigation [Member]
Loss Contingencies [Line Items]
Number of claims							1	1
Class Action Versus American Realty Capital Properties, Cole and Cole Board of Directors [Member] | Breach of Fiduciary Duty [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of claims						8
Amended Stipulation and Release and Agreement of Compromise and Settlement [Member] | Breach of Fiduciary Duty [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Number of claims	1			1
Settlement amount | $	$ 14,000,000
Portion of settlement to be used for attorney fees	50.00%
Putative Class Action [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Stipulation of settlement, maximum attorney fees | $		$ 625,000