SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2015 Transaction	Dec. 31, 2021 USD ($)
Accounts Receivable
Income Property Tenant Receivables	$ 1,679		$ 885
Number of closed land transactions | Transaction		2
Allowance for doubtful accounts	500		500
Other Asset
Accounts Receivable
Income Property Tenant Receivables	1,700		900
Income Property Tenant Receivables, Increase (Decrease)	800
Accounts receivable related to real estate operations	1,100		1,100
Receivable from Golf operations for rounds surcharge	$ 300		$ 300