Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions (Schedule Of Real Estate Held For Sale/Discontinued Operations/Dispositions) (Details)

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Recent Transactions (Schedule Of Real Estate Held For Sale/Discontinued Operations/Dispositions) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Less: Accumulated depreciation $ (606,625) $ (583,416)
Real estate held for sale, net 412,058 $ 618,646
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Other Assets Held for Sale [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Land 142,212  
Buildings & Other 398,288  
Less: Accumulated depreciation (128,442)  
Real estate held for sale, net 412,058  
Unbilled rents receivable, net 15,894  
Deferred charges, net 12,637  
Total deferred charges & other assets, net 15,573  
Mortgages & loans payable, net (249,106)  
Accounts payable, accrued exp & other liability 3,833  
Unearned rents/deferred rental income $ (3,694)