Related Party Transactions and Arrangements (Merger Related Costs) (Narrative) (Details) - USD ($) $ in Thousands			9 Months Ended
	Jan. 08, 2014	Dec. 09, 2013	Sep. 30, 2014
Affiliated Entity [Member] | Merger Related Costs, Strategic Advisory Services [Member]
Related Party Transaction [Line Items]
Related party expenses			$ 27,265
ARCT IV [Member] | Affiliated Entity [Member] | Merger Related Costs, Strategic Advisory Services [Member]
Related Party Transaction [Line Items]
Related party expenses			$ 8,400
Cole Merger [Member] | Affiliates of Former Manager [Member] | Strategic and Financial Advisory Services Fee [Member]
Related Party Transaction [Line Items]
Percentage of contract purchase price			0.25%
Related party expenses			$ 14,200
Cole Merger [Member] | Affiliated Entity [Member] | Transaction Management Support [Member]
Related Party Transaction [Line Items]
Payments of related party expenses	$ 2,900
Related party expenses		$ 2,900
Cole Merger [Member] | Affiliated Entity [Member] | Merger Related Costs, Strategic Advisory Services [Member]
Related Party Transaction [Line Items]
Related party expenses			17,115
Multiple-tenant Spin-off [Member] | Affiliated Entity [Member] | Merger Related Costs, Strategic Advisory Services [Member]
Related Party Transaction [Line Items]
Related party expenses			1,750
RCS Advisory [Member] | ARCT IV [Member] | Strategic and Financial Advisory Services Fee [Member]
Related Party Transaction [Line Items]
Payments of related party expenses			$ 8,400