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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details)
$ in Millions
 3 Months Ended
Dec. 31, 2015
Transaction
Sep. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Accounts Receivable      
Number of closed land transactions | Transaction 2    
Allowance for doubtful accounts   $ 2.2 $ 1.7
Other Assets      
Accounts Receivable      
Income Property Tenant Receivables, Net of Allowance for Doubtful Accounts   5.1 4.6
Accounts receivable related to real estate operations   $ 0.6 $ 0.6