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