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Goodwill, Deferred Leasing Costs and Other Intangibles - Amortization of Intangible Assets and Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Net increase (decrease) to rental income $ 209 $ (131)
Amortization expense 44,760 45,251
Investment management intangibles    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense 6,090 5,055
Deferred leasing costs and lease-related intangibles    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense 32,843 33,707
Customer relationships and service contracts    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense 4,249 4,914
Trade name    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense 1,098 1,098
Other    
Finite-Lived Intangible Assets [Line Items]    
Amortization expense $ 480 $ 477