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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 Transaction | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Accounts Receivable |  |  |
Number of closed land transactions | Transaction | 2 |  |
Allowance for doubtful accounts |  | $ 2.3 | $ 1.8
Other Assets |  |  |
Accounts Receivable |  |  |
Income Property Tenant Receivables, Net of Allowance for Doubtful Accounts |  | 3.6 | 2.2
Accounts receivable related to real estate operations |  | 0.8 | 0.8
Receivable from Golf operations for rounds surcharge |  | $ 0.1 | $ 0.2

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