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Goodwill, Deferred Leasing Costs and Other Intangibles - Goodwill By Reportable Segment (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Goodwill [Roll Forward]      
Beginning balance $ 761,368 $ 761,368  
Business combination (Note 3) 161,744 0  
Ending balance 923,112 761,368  
Goodwill deductible for tax purposes 117,100   $ 122,400
Investment Management      
Goodwill [Roll Forward]      
Beginning balance 298,248 298,248  
Business combination (Note 3) 161,744 0  
Ending balance 459,992 298,248  
Operating      
Goodwill [Roll Forward]      
Beginning balance 463,120 463,120  
Business combination (Note 3) 0 0  
Ending balance $ 463,120 $ 463,120