Fair Value Measurements and Fair Value of Financial Instruments - Fair Value Measurements and Fair Value of Financial Instruments, Carrying Amount and Estimated Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Securities available-for-sale	$ 350,073	$ 356,062
Equity securities	391	402
Carrying Amount [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	154,567	183,078
Long-term certificate of deposit	1,425	1,425
Securities available-for-sale	350,073	356,062
Securities held-to-maturity	787,132	776,147
Equity securities	391	402
Federal Home Loan Bank stock	2,311	5,504
Net loans receivable	1,649,555	1,607,260
Accrued interest receivable	17,321	16,381
Interest rate swap asset	5,655	4,733
Deposits	2,723,187	2,639,835
Borrowings	4,189	78,189
Subordinated notes payable, net	49,904	49,867
Accrued interest payable	678	1,271
Interest rate swap liability	5,655	4,733
Fair Value [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	154,567	183,078
Long-term certificate of deposit	1,428	1,421
Securities available-for-sale	350,073	356,062
Securities held-to-maturity	761,903	738,134
Equity securities	391	402
Federal Home Loan Bank stock	2,311	5,504
Net loans receivable	1,582,569	1,536,150
Accrued interest receivable	17,321	16,381
Interest rate swap asset	5,655	4,733
Deposits	2,722,868	2,639,246
Borrowings	4,214	78,346
Subordinated notes payable, net	49,098	48,485
Accrued interest payable	678	1,271
Interest rate swap liability	5,655	4,733
Level 1 [Member] | Fair Value [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	154,567	183,078
Long-term certificate of deposit	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Equity securities	391	402
Federal Home Loan Bank stock	0	0
Net loans receivable	0	0
Accrued interest receivable	0	0
Interest rate swap asset	0	0
Deposits	0	0
Borrowings	0	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	0
Interest rate swap liability	0	0
Level 2 [Member] | Fair Value [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	0	0
Long-term certificate of deposit	1,428	1,421
Securities available-for-sale	350,073	356,062
Securities held-to-maturity	761,903	738,134
Equity securities	0	0
Federal Home Loan Bank stock	2,311	5,504
Net loans receivable	0	0
Accrued interest receivable	17,321	16,381
Interest rate swap asset	5,655	4,733
Deposits	2,722,868	2,639,246
Borrowings	4,214	78,346
Subordinated notes payable, net	49,098	48,485
Accrued interest payable	678	1,271
Interest rate swap liability	5,655	4,733
Level 3 [Member] | Fair Value [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	0	0
Long-term certificate of deposit	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Equity securities	0	0
Federal Home Loan Bank stock	0	0
Net loans receivable	1,582,569	1,536,150
Accrued interest receivable	0	0
Interest rate swap asset	0	0
Deposits	0	0
Borrowings	0	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	0
Interest rate swap liability	$ 0	$ 0