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Real Estate Fund Investments (Changes in the Fair Value of Fund and Joint Venture) (Details) - Real Estate Investments - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 0 $ 7,730
Previously recorded unrealized loss on exited investments 247,575 0
Realized loss on exited investments (247,575) 0
Net unrealized income on held investments 0 5,672
Ending balance $ 0 $ 13,402