SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015 Transaction	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Accounts Receivable
Income Property Tenant Receivables		$ 885	$ 2,330
Number of closed land transactions | Transaction	2
Allowance for doubtful accounts		500	500
Other Asset
Accounts Receivable
Income Property Tenant Receivables		900	2,300
Income Property Tenant Receivables, Increase (Decrease)		(1,400)
Accounts receivable related to real estate operations		1,100	1,300
Receivable from Golf operations for rounds surcharge		$ 300	$ 500