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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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