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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investment Properties (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Accounting Policies [Abstract]    
Land, buildings and improvements $ 7,656,765 $ 7,550,988
Construction in progress 75,808 41,360
Investment properties, at cost $ 7,732,573 $ 7,592,348