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Summary Of Significant Accounting Policies (Supplemental Consolidated Statements Of Cash Flows Information) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Supplemental disclosure of cash activities:      
Cash paid for interest $ 27,521,000 $ 32,275,000 $ 36,114,000
Supplemental disclosure of non-cash activities:      
Capitalization of interest and financing costs 409,000 757,000 915,000
Conversions of OP Units into common stock 282,000 371,000 24,000
Issuance of OP Units in connection with a property acquisition     (1,500,000)
Mortgage loans payable assumed upon acquisition $ (20,462,000) (53,439,000)  
Mortgage loans payable assumed by buyer   15,557,000  
Deed-in-lieu of foreclosure of properties:      
Real estate transferred   (6,238,000) (4,724,000)
Mortgage loan payable and related obligations settled   $ 7,661,000 $ 13,878,000