Quarterly report pursuant to Section 13 or 15(d)

Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details)

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Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Deferred Charges, Goodwill And Other Assets [Line Items]    
Deferred leasing costs $ 140,527,000 $ 142,424,000
Deferred financing costs - unsecured revolving credit facility 5,559,000 5,559,000
Deferred charges, gross 146,086,000 147,983,000
Accumulated amortization (60,286,000) (59,522,000)
Deferred charges, net 85,800,000 88,461,000
Notes receivable 1,417,000 1,625,000
In-place lease values, related intangibles and other assets, net 80,051,000 86,092,000
Goodwill 2,945,000 2,945,000
Right of use assets 22,604,000 22,604,000
Prepaid expenses and other assets, net 45,087,000 73,375,000
Total deferred charges, goodwill and other assets, net 237,904,000 275,102,000
Liability 23,800,000  
Acquisition-related Costs [Member]    
Deferred Charges, Goodwill And Other Assets [Line Items]    
Net sales proceeds held by qualified intermediary 0 28,100,000
Interest-Free Notes Receivable [Member]    
Deferred Charges, Goodwill And Other Assets [Line Items]    
Notes receivable $ 1,400,000 1,600,000
Mortgage loan, maturity month and year April 2023  
Discontinued Operations [Member]    
Deferred Charges, Goodwill And Other Assets [Line Items]    
Total deferred charges, goodwill and other assets, net $ 67,800,000 $ 68,600,000