Quarterly report pursuant to Section 13 or 15(d)

Properties, Net (Operating properties, net) (Details)

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Properties, Net (Operating properties, net) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Construction Activities    
Operating properties, net $ 3,167,851 $ 3,090,510
Operating Properties    
Construction Activities    
Less: accumulated depreciation (1,182,652) (1,152,523)
Operating properties, net 3,167,851 3,090,510
Operating Properties | Land    
Construction Activities    
Gross 584,878 572,900
Operating Properties | Buildings and improvements    
Construction Activities    
Gross $ 3,765,625 $ 3,670,133