Discontinued Operations (Operating Results Relating To Assets Disposed) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended
	Apr. 02, 2014 properties	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013 properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
number of properties sold	4				5
Rental revenue		$ 0	$ 163	$ 3	$ 1,623
Disposal Group Including Discontinued Operation Tenant Reimbursements		0	0	0	554
Total revenue		0	163	3	2,177
Property operating expense		3	66	13	38
Other expense		0	87	(18)	241
Transaction (costs) benefit		0	0	3,376	0
Disposal Group, Including Discontinued Operation, Interest Expense		0	0	0	(28)
Depreciation and amortization		0	205	0	1,728
Loss before gain on sale or acquisition of real estate		(3)	(195)	3,384	198
Gain on sale of real estate		0	3,168	0	3,733
Net income		$ (3)	$ 2,973	$ 3,384	$ 3,931