FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Schedule of Information Regarding Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025
Customer Interest Rate Swaps [Member]
Classified in Other Assets:
Notional Amount	$ 45,579	$ 43,122
Average Maturity (Years)	3 years 6 months	3 years 7 months 6 days
Weighted Average Fixed Rate	5.77%	5.75%
Weighted Average Variable Rate	1 Mo. SOFR + 2.66	1 Mo. SOFR + 2.66
Fair Value	$ 800	$ 911
Classified in Other Assets [Member]
Classified in Other Assets:
Notional Amount	$ 45,579	$ 43,122
Average Maturity (Years)	3 years 6 months	3 years 7 months 6 days
Weighted Average Fixed Rate	5.77%	5.75%
Fair Value	$ 800	$ 911
3rd Party Interest Rate swaps [Member]
Classified in Other Assets:
Notional Amount	$ 45,579	$ 43,122
Average Maturity (Years)	3 years 6 months	3 years 7 months 6 days
Weighted Average Fixed Rate	5.77%	5.75%
Weighted Average Variable Rate	1 Mo. SOFR + 2.66	1 Mo. SOFR + 2.66
Fair Value	$ 800	$ 911
Classified in Other Liabilities [Member]
Classified in Other Assets:
Notional Amount	$ 45,579	$ 43,122
Average Maturity (Years)	3 years 6 months	3 years 7 months 6 days
Weighted Average Fixed Rate	5.77%	5.75%
Fair Value	$ 800	$ 911

Magyar Bancorp, Inc. 10-Q