SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Principles of Consolidation (Details) $ in Millions	Dec. 10, 2021 USD ($) a	Sep. 30, 2021	Jun. 30, 2018
Mitigation Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity method investment, ownership percentage (as a percent)		30.00%	30.00%
Land JV
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity method investment, ownership percentage (as a percent)	33.50%
Acres sold | a	1,600
Final sales price | $	$ 66.3