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REGULATORY CAPITAL - Schedule of Company’s and Bank’s Actual and Required Capital Levels (Details)
Sep. 30, 2025
Sep. 30, 2024
Tier 1 leverage ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Required for capital adequacy purposes 4.00% 4.00%
To be well-capitalized under prompt corrective action provisions 5.00% 5.00%
Tier 1 leverage ratio [Member] | Magyar Bank [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Bank 11.41% 11.11%
CET1 [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Required for capital adequacy purposes [1] 7.00% 7.00%
To be well-capitalized under prompt corrective action provisions 6.50% 6.50%
CET1 [Member] | Magyar Bank [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Bank 14.70% 14.75%
Tier 1 risk-based capital ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Required for capital adequacy purposes [1] 8.50% 8.50%
To be well-capitalized under prompt corrective action provisions 8.00% 8.00%
Tier 1 risk-based capital ratio [Member] | Magyar Bank [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Bank 14.70% 14.75%
Total risk-based capital ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Required for capital adequacy purposes [1] 10.50% 10.50%
To be well-capitalized under prompt corrective action provisions 10.00% 10.00%
Total risk-based capital ratio [Member] | Magyar Bank [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Bank 15.79% 15.85%
Magyar Bancorp, Inc. [Member] | Tier 1 leverage ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Company 11.83% 11.64%
Magyar Bancorp, Inc. [Member] | CET1 [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Company 15.24% 15.44%
Magyar Bancorp, Inc. [Member] | Tier 1 risk-based capital ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Company 15.24% 15.44%
Magyar Bancorp, Inc. [Member] | Total risk-based capital ratio [Member]    
Schedule of Company’s and Bank’s Actual and Required Capital Levels [Line Items]    
Company 16.33% 16.55%
[1] Includes 2.50% capital conservation buffer