Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Construction Projects) (Narrative) (Details)

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Commitments And Contingencies (Construction Projects) (Narrative) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
item
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Commitments And Contingencies [Line Items]          
Costs of the project incurred $ 3,573 $ 3,598 $ 10,816 $ 10,564  
Amount outstanding $ 174,000   174,000   $ 25,000
25 Christopher Columbus [Member]          
Commitments And Contingencies [Line Items]          
Construction costs incurred     $ 406,800    
Delivery date to tenant     first quarter 2022    
Number of units | item 750   750    
Amount outstanding $ 237,300   $ 237,300    
Total project costs     469,500    
Amount to fund 169,500   169,500    
Construction Loan [Member] | 25 Christopher Columbus [Member]          
Commitments And Contingencies [Line Items]          
Amount outstanding $ 300,000   $ 300,000