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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	Sep. 30, 2025	Jun. 30, 2025
Assets:
Investment securities available for sale	$ 1,016,182	$ 1,012,969
Interest rate contracts	10,288	16,745
Total assets	1,026,470	1,029,714
Liabilities
Interest rate contracts	5,182	5,149
Total liabilities	5,182
Debt securities
Assets:
Investment securities available for sale	527,666	522,860
Asset-backed securities
Assets:
Investment securities available for sale	58,488	59,498
Collateralized loan obligations
Assets:
Investment securities available for sale	331,855	323,245
Corporate bonds
Assets:
Investment securities available for sale	137,323	140,117
Mortgage-backed securities
Assets:
Investment securities available for sale	488,516	490,109
Residential pass-through securities
Assets:
Investment securities available for sale	356,339	357,319
Commercial pass-through securities
Assets:
Investment securities available for sale	132,177	132,790
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
Liabilities
Interest rate contracts	0	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) | 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) | 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	1,016,182	1,012,969
Interest rate contracts	10,288	16,745
Total assets	1,026,470	1,029,714
Liabilities
Interest rate contracts	5,182
Total liabilities	5,182
Significant Other Observable Inputs (Level 2) | Debt securities
Assets:
Investment securities available for sale	527,666	522,860
Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Investment securities available for sale	58,488	59,498
Significant Other Observable Inputs (Level 2) | Collateralized loan obligations
Assets:
Investment securities available for sale	331,855	323,245
Significant Other Observable Inputs (Level 2) | Corporate bonds
Assets:
Investment securities available for sale	137,323	140,117
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Assets:
Investment securities available for sale	488,516	490,109
Significant Other Observable Inputs (Level 2) | Residential pass-through securities
Assets:
Investment securities available for sale	356,339	357,319
Significant Other Observable Inputs (Level 2) | Commercial pass-through securities
Assets:
Investment securities available for sale	132,177	132,790
Significant Unobservable Inputs (Level 3)
Assets:
Investment securities available for sale	0	0
Interest rate contracts	0	0
Total assets	0	0
Liabilities
Interest rate contracts	0
Total liabilities	0
Significant Unobservable Inputs (Level 3) | Debt securities
Assets:
Investment securities available for sale	0	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) | 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	10,288	16,745
Liabilities
Interest rate contracts	5,182	5,149
Interest Rate Contract | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Interest rate contracts	0	0
Liabilities
Interest rate contracts	0
Interest Rate Contract | Significant Other Observable Inputs (Level 2)
Assets:
Interest rate contracts	10,288	16,745
Liabilities
Interest rate contracts	5,182
Interest Rate Contract | Significant Unobservable Inputs (Level 3)
Assets:
Interest rate contracts	0	$ 0
Liabilities
Interest rate contracts	$ 0

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