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REAL ESTATE OPERATIONS - Real Estate Operations Revenues (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues      
Subsurface Revenue $ 1,727 $ 1,904 $ 4,724
Revenue from contract with customer, including assessed tax 3,984 5,462 13,427
Mitigation Credit Sales | Real Estate Operations      
Revenues      
Revenue from contract with customer, including assessed tax $ 2,257 3,462 708
Land Sales Revenue | Real Estate Operations      
Revenues      
Revenue from contract with customer, including assessed tax   $ 96 $ 7,995