Commitments and Contingencies (Litigation) (Narrative) (Details)		1 Months Ended		3 Months Ended
	Jan. 21, 2015 USD ($) lawsuit	Dec. 31, 2013 USD ($) lawsuit	Oct. 31, 2013	Feb. 28, 2015 lawsuit	Jan. 31, 2015 lawsuit	Nov. 30, 2013 lawsuit	Apr. 30, 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
Pending Litigation [Member] | Putative Class Action [Member]
Loss Contingencies [Line Items]
Attorney fees | $		$ 625,000
Claims Under The Securities Exchange Act of 1934 [Member] | Stayed Litigation [Member] | Securities Fraud Action [Member]
Loss Contingencies [Line Items]
Number of additional individual securities fraud actions					2
Claims Under The Securities Act of 1933 [Member] | Stayed Litigation [Member] | Class Action [Member]
Loss Contingencies [Line Items]
Number of additional individual securities fraud actions							2
Breach of Fiduciary Duty [Member] | Pending Litigation [Member] | Class Action Versus American Realty Capital Properties, Cole and Cole Board of Directors [Member]
Loss Contingencies [Line Items]
Number of additional individual securities fraud actions		8				8
Breach of Fiduciary Duty [Member] | Settled Litigation [Member] | Amended Stipulation and Release and Agreement of Compromise and Settlement [Member]
Loss Contingencies [Line Items]
Number of additional individual securities fraud actions	2
Settlement amount | $	$ (14,000,000)
Series B Cumulative Preferred [Member] | CapLease [Member] | John Poling Putative Class Action [Member]
Loss Contingencies [Line Items]
Preferred stock, dividend rate			8.375%
Series C Cumulative Preferred Stock [Member] | CapLease [Member] | John Poling Putative Class Action [Member]
Loss Contingencies [Line Items]
Preferred stock, dividend rate			7.25%