LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES(Financing Receivable, Modified, Past Due) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
30-59 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	$ 0
60 to 89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	2,761
Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated		$ 2,761
Commercial Business | 30-59 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
Commercial Business | 60 to 89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
Commercial Business | 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	121
Commercial Business | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	121
Agricultural Business | 30-59 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
Agricultural Business | 60 to 89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
Agricultural Business | 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	1,580
Agricultural Business | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	1,580
One- to Four-Family Residential | 30-59 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
One- to Four-Family Residential | 60 to 89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	0
One- to Four-Family Residential | 90 Days Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	1,060
One- to Four-Family Residential | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	$ 1,060