REAL ESTATE OPERATIONS - Subsurface Interests (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) a	Mar. 31, 2021 USD ($) a
Subsurface interests
Area of land (in acres) | a	4,750	25,000
Lease revenue	$ 15,168	$ 11,449
Royalty
Subsurface interests
Revenue from contract with customer, including assessed tax	$ 10	10
Surface land over subsurface interests
Subsurface interests
Area of land (in acres) | a	365,000
Revenue recognized for cash payments for the release of surface entry rights	$ 20	10
Real Estate Operations | Subsurface Revenue, Land Sales
Subsurface interests
Revenue from contract with customer, including assessed tax	400	1,900
Real Estate Operations | Mitigation Credit Sales
Subsurface interests
Revenue from contract with customer, including assessed tax	$ 0	$ 0