Discontinued Operations (Operating Results Relating To Assets Disposed) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended
	Apr. 02, 2014 properties	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 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	$ 714	$ 3	$ 1,459
Disposal Group Including Discontinued Operation Tenant Reimbursements		0	554	0	554
Total revenue		0	1,268	3	2,013
Property operating expense		4	(20)	10	(30)
Other expense		0	87	(18)	154
Transaction (costs) benefit		0	0	3,376	0
Disposal Group, Including Discontinued Operation, Interest Expense		0	(28)	0	(28)
Depreciation and amortization		0	600	0	1,523
Loss before gain on sale or acquisition of real estate		(4)	629	3,387	394
Gain on sale of real estate		0	0	0	565
Net income		$ (4)	$ 629	$ 3,387	$ 959