Summary Of Significant Accounting Policies (Supplemental Consolidated Statements Of Cash Flows Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental disclosure of cash activities:
Cash paid for interest	$ 26,296,000	$ 27,521,000	$ 32,275,000
Supplemental disclosure of non-cash activities:
Capitalization of interest and financing costs	743,000	409,000	757,000
Conversions of OP Units into common stock		282,000	371,000
Mortgage loan payable assumed upon acquisition	$ (8,501,000)	$ (20,462,000)	(53,439,000)
Mortgage loan assumed by buyer			15,557,000
Deed-in-lieu of foreclosure of properties:
Real estate transferred			(6,238,000)
Mortgage loans payable and related obligations settled			$ 7,661,000