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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | ---
Assets: |  |
Investment securities available for sale | $ 1,144,175 | $ 1,227,729
Interest rate contracts | 44,120 | 71,624
Total assets | 1,188,295 | 1,299,353
Fair Value | 3,448 | 0
Total liabilities | 3,448 |
Debt securities |  |
Assets: |  |
Investment securities available for sale | 647,065 | 648,184
Obligations of state and political subdivisions |  |
Assets: |  |
Investment securities available for sale |  | 0
Asset-backed securities |  |
Assets: |  |
Investment securities available for sale | 90,660 | 136,170
Collateralized loan obligations |  |
Assets: |  |
Investment securities available for sale | 424,133 | 376,996
Corporate bonds |  |
Assets: |  |
Investment securities available for sale | 132,272 | 135,018
Mortgage-backed securities |  |
Assets: |  |
Investment securities available for sale | 497,110 | 579,545
Collateralized mortgage obligations |  |
Assets: |  |
Investment securities available for sale |  | 0
Residential pass-through securities |  |
Assets: |  |
Investment securities available for sale | 359,511 | 436,151
Commercial pass-through securities |  |
Assets: |  |
Investment securities available for sale | 137,599 | 143,394
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Interest rate contracts | 0 | 0
Total assets | 0 | 0
Fair Value | 0 |
Total liabilities | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Debt securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of state and political subdivisions |  |
Assets: |  |
Investment securities available for sale |  | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized loan obligations |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations |  |
Assets: |  |
Investment securities available for sale |  | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential pass-through securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial pass-through securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Investment securities available for sale | 1,144,175 | 1,227,729
Interest rate contracts | 44,120 | 71,624
Total assets | 1,188,295 | 1,299,353
Fair Value | 3,448 |
Total liabilities | 3,448 |
Significant Other Observable Inputs (Level 2) | Debt securities |  |
Assets: |  |
Investment securities available for sale | 647,065 | 648,184
Significant Other Observable Inputs (Level 2) | Obligations of state and political subdivisions |  |
Assets: |  |
Investment securities available for sale |  | 0
Significant Other Observable Inputs (Level 2) | Asset-backed securities |  |
Assets: |  |
Investment securities available for sale | 90,660 | 136,170
Significant Other Observable Inputs (Level 2) | Collateralized loan obligations |  |
Assets: |  |
Investment securities available for sale | 424,133 | 376,996
Significant Other Observable Inputs (Level 2) | Corporate bonds |  |
Assets: |  |
Investment securities available for sale | 132,272 | 135,018
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities |  |
Assets: |  |
Investment securities available for sale | 497,110 | 579,545
Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations |  |
Assets: |  |
Investment securities available for sale |  | 0
Significant Other Observable Inputs (Level 2) | Residential pass-through securities |  |
Assets: |  |
Investment securities available for sale | 359,511 | 436,151
Significant Other Observable Inputs (Level 2) | Commercial pass-through securities |  |
Assets: |  |
Investment securities available for sale | 137,599 | 143,394
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Interest rate contracts | 0 | 0
Total assets | 0 | 0
Fair Value | 0 |
Total liabilities | 0 |
Significant Unobservable Inputs (Level 3) | Debt securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Obligations of state and political subdivisions |  |
Assets: |  |
Investment securities available for sale |  | 0
Significant Unobservable Inputs (Level 3) | Asset-backed securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Collateralized loan obligations |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Corporate bonds |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations |  |
Assets: |  |
Investment securities available for sale |  | 0
Significant Unobservable Inputs (Level 3) | Residential pass-through securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Significant Unobservable Inputs (Level 3) | Commercial pass-through securities |  |
Assets: |  |
Investment securities available for sale | 0 | 0
Interest Rate Contract |  |
Assets: |  |
Interest rate contracts | 44,120 | 71,624
Fair Value | 3,448 | 0
Interest Rate Contract | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate contracts | 0 | 0
Fair Value | 0 |
Interest Rate Contract | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate contracts | 44,120 | 71,624
Fair Value | 3,448 |
Interest Rate Contract | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate contracts | 0 | $ 0
Fair Value | $ 0 |

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