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Summary Of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Separate Unrestricted Cash For Deferred Compensation Plan. $ 38,100   $ 39,400
Gains (losses) from investments in securities (365) $ 2,272  
Prepaid Expense and Other Assets 138,868   70,839
Unsecured commercial paper $ 500,000   500,000
Number of VIEs 11    
Commercial Paper      
Summary Of Significant Accounting Policies [Line Items]      
Unsecured commercial paper $ 500,000    
Unconsolidated Joint Ventures [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of VIEs 2    
Deferred Compensation, Excluding Share-Based Payments and Retirement Benefits      
Summary Of Significant Accounting Policies [Line Items]      
Gains (losses) from investments in securities $ (400) $ 2,300  
Environmental Focused Investment Fund      
Summary Of Significant Accounting Policies [Line Items]      
Prepaid Expense and Other Assets 7,700   7,100
Variable Interest Entity, Primary Beneficiary [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Prepaid Expense and Other Assets $ 46,605   $ 15,036
Number of VIEs 9    
Commercial Real Estate Properties [Member] | Variable Interest Entity, Primary Beneficiary [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of VIEs 6