Annual report pursuant to Section 13 and 15(d)

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

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Properties, Net (Operating properties, net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating properties, net        
Gross $ 4,959,709 $ 4,686,802 $ 4,348,006 $ 4,148,529
Operating properties, net 3,090,510 2,915,016    
Operating properties, net        
Operating properties, net        
Less: accumulated depreciation (1,152,523) (1,052,007)    
Operating properties, net 3,090,510 2,915,016    
Operating properties, net | Land        
Operating properties, net        
Gross 572,900 522,219    
Operating properties, net | Buildings and improvements        
Operating properties, net        
Gross $ 3,670,133 $ 3,444,804