Related Party Transactions and Arrangements (Investment in the Cole REITs) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Related Party Transaction [Line Items]
Carrying Amount of Investment	$ 23,445		$ 56,824
Net loss	(206)	$ (28)
Cole REITs [Member]
Related Party Transaction [Line Items]
Carrying Amount of Investment	3,809
Net loss	122	$ 44
Cole REITs [Member]
Related Party Transaction [Line Items]
Carrying Amount of Investment	$ 3,800		$ 4,100