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REGULATORY CAPITAL (Tables)
 12 Months Ended
Sep. 30, 2023
Regulatory Capital [Abstract]  
Schedule of Bank’s Actual and Required Capital Levels The following tables set forth the Company’s and the Bank’s actual and required capital levels under those measures:
              To be well-
              capitalized under
           Required for capital  prompt corrective
At September 30, 2023  Company   Bank   adequacy purposes  action provisions
Tier 1 leverage ratio   12.12%    11.11%   ≥  4.00%  ≥   5.00%
CET1   16.33%    14.97%   ≥  7.00% (1)  ≥   6.50%
Tier 1 risk-based capital ratio   16.33%    14.97%   ≥  8.50% (1)  ≥   8.00%
Total risk-based capital ratio   17.58%    16.22%   ≥  10.50% (1)  ≥ 10.00%
                 
At September 30, 2022                
Tier 1 leverage ratio   12.57%    11.13%   ≥  4.00%  ≥   5.00%
CET1   17.16%    15.22%   ≥  7.00% (1)  ≥   6.50%
Tier 1 risk-based capital ratio   17.16%    15.22%   ≥  8.50% (1)  ≥   8.00%
Total risk-based capital ratio   18.41%    16.47%   ≥  10.50% (1)  ≥ 10.00%

(1) Includes 2.50% capital conservation buffer