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Summary Of Significant Accounting Policies (Supplemental Consolidated Statements Of Cash Flows Information) (Details) - USD ($)
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Supplemental disclosure of cash activities:    
Cash paid for interest $ 21,059,000 $ 24,734,000
Supplemental disclosure of non-cash activities:    
Capitalization of interest and financing costs 336,000 597,000
Conversions of OP Units into common stock $ 282,000 371,000
Mortgage loans payable assumed upon acquisition   (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)
Mortgage loan payable and related obligations settled   $ 7,661,000