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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]      
Interest capitalized $ 52,130,000 $ 53,097,000 $ 53,881,000
Salaries And Related Costs Capitalized 16,100,000 13,700,000 12,900,000
Cash FDIC Insured Limit 250,000    
Separate Unrestricted Cash For Deferred Compensation Plan. 32,300,000 43,600,000  
Gains (losses) from investments in securities $ (6,453,000) 5,626,000 5,261,000
Accounts Receivable, Collection Period Expected 1    
Straight Line Rent Adjustments $ 108,000,000 104,300,000 104,900,000
Above and below market rent adjustments, net $ 9,100,000 4,200,000 6,500,000
REIT Distribution Requirement 90.00%    
Company's Taxable Income Distribution 100.00%    
Unrealized Gain (Loss) on Investments $ (150,000) $ 0 $ 0
Environmental Focused Investment Fund      
Summary Of Significant Accounting Policies [Line Items]      
Unrealized Gain (Loss) on Investments $ (200,000)