Discontinued Operations (Operating Results Relating To Assets Disposed) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Significant Acquisitions and Disposals [Line Items]
reversal of liability			$ 3,900
Rental revenue		$ 0	3
Tenant reimbursements		68	0
Other income		172	0
Total revenue		240	3
Property operating expense (income)		12	(484)
Other expense (income)		0	(18)
Transaction costs (benefit)	$ 0	0	(3,376)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		228	3,881
Discontinued Operation, Tax Effect of Discontinued Operation		29	0
Net income	$ 0	$ 199	$ 3,881