OTHER REAL ESTATE RELATED AND OTHER INVESTMENTS - Schedule of Real Estate Related Investment Activity (Details) - Other Real Estate Related Investments - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Origination of other real estate related investments	$ 78,164	$ 556,951
Accrued interest, net	372	4,099
Unrealized gain (loss) on other real estate related investments, net	6,858	(689)
Payments of other real estate related investments	(9,302)	0
Net change in other loans receivable	$ 76,092	$ 560,361