Fair Value Measurements and Fair Value of Financial Instruments, Carrying Amount and Estimated Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jun. 30, 2023
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Securities available-for-sale	$ 345,519	$ 281,133
Equity securities	343	306
Carrying Amount [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	255,823	196,445
Long term certificates of deposit	3,083	4,576
Securities available-for-sale	345,519	281,133
Securities held-to-maturity	700,371	726,363
Equity securities	343	306
Federal Home Loan Bank stock	2,219	1,682
Net loans receivable	1,457,253	1,387,654
Accrued interest receivable	16,762	12,249
Interest rate swaps asset	591
Deposits	2,557,107	2,437,161
Borrowings	36,156
Subordinated notes payable, net	49,635	49,495
Accrued interest payable	793	936
Interest rate swaps liability	591
Fair Value [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	255,823	196,445
Long term certificates of deposit	3,004	4,383
Securities available-for-sale	345,519	281,133
Securities held-to-maturity	647,504	671,066
Equity securities	343	306
Federal Home Loan Bank stock	2,219	1,682
Net loans receivable	1,359,969	1,272,361
Accrued interest receivable	16,762	12,249
Interest rate swaps asset	591
Deposits	2,556,046	2,437,357
Borrowings	36,133
Subordinated notes payable, net	46,320	47,669
Accrued interest payable	793	936
Interest rate swaps liability	591
Fair Value [Member] | Level 1 [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	255,823	196,445
Long term certificates of deposit	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Equity securities	343	306
Federal Home Loan Bank stock	0	0
Net loans receivable	0	0
Accrued interest receivable	0	0
Interest rate swaps asset	0
Deposits	0	0
Borrowings	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	0
Interest rate swaps liability	0
Fair Value [Member] | Level 2 [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	0	0
Long term certificates of deposit	3,004	4,383
Securities available-for-sale	345,519	281,133
Securities held-to-maturity	647,504	671,066
Equity securities	0	0
Federal Home Loan Bank stock	2,219	1,682
Net loans receivable	0	0
Accrued interest receivable	16,762	12,249
Interest rate swaps asset	591
Deposits	2,556,046	2,437,357
Borrowings	36,133
Subordinated notes payable, net	46,320	47,669
Accrued interest payable	793	936
Interest rate swaps liability	591
Fair Value [Member] | Level 3 [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	0	0
Long term certificates 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	1,359,969	1,272,361
Accrued interest receivable	0	0
Interest rate swaps asset	0
Deposits	0	0
Borrowings	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	$ 0
Interest rate swaps liability	$ 0