REAL ESTATE OPERATIONS - Other Real Estate Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) item	Mar. 31, 2020 USD ($) item	Dec. 31, 2020 USD ($)
Land and development costs and subsurface interests
Investment mitigation credits assets	$ 2,622	$ 1,200	$ 2,622
Number of mitigation credits with cost basis | item		16
Amount of Mitigation Credits With Cost Basis	$ 0
Minimum
Land and development costs and subsurface interests
Amount of Mitigation Credits With Cost Basis		$ 10
Cost of revenues
Land and development costs and subsurface interests
Aggregate cost of sales		$ 1,400
Mitigation Bank JV
Land and development costs and subsurface interests
Number of mitigation credits acquired | item	2
Mitigation credits purchased	$ 200