Fair Value Measurements and Fair Value of Financial Instruments, Carrying Amount and Estimated Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 30, 2023
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Securities available-for-sale	$ 307,809	$ 281,133
Equity securities	325	306
Carrying Amount [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	176,080	196,445
Long term certificates of deposit	3,822	4,576
Securities available-for-sale	307,809	281,133
Securities held-to-maturity	700,853	726,363
Equity securities	325	306
Federal Home Loan Bank stock	7,654	1,682
Net loans receivable	1,436,866	1,387,654
Accrued interest receivable	14,499	12,249
Interest rate swaps asset	1,156
Deposits	2,334,837	2,437,161
Borrowings	129,374
Subordinated notes payable, net	49,588	49,495
Accrued interest payable	1,020	936
Interest rate swaps liability	1,156
Fair Value [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	176,080	196,445
Long term certificates of deposit	3,713	4,383
Securities available-for-sale	307,809	281,133
Securities held-to-maturity	651,213	671,066
Equity securities	325	306
Federal Home Loan Bank stock	7,654	1,682
Net loans receivable	1,337,650	1,272,361
Accrued interest receivable	14,499	12,249
Interest rate swaps asset	1,156
Deposits	2,334,088	2,437,357
Borrowings	129,697
Subordinated notes payable, net	46,982	47,669
Accrued interest payable	1,020	936
Interest rate swaps liability	1,156
Fair Value [Member] | Level 1 [Member]
Carrying Amounts and Estimated Fair Value of Financial Instruments [Abstract]
Cash and cash equivalents	176,080	196,445
Long term certificates of deposit	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Equity securities	325	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	3,713	4,383
Securities available-for-sale	307,809	281,133
Securities held-to-maturity	651,213	671,066
Equity securities	0	0
Federal Home Loan Bank stock	7,654	1,682
Net loans receivable	0	0
Accrued interest receivable	14,499	12,249
Interest rate swaps asset	1,156
Deposits	2,334,088	2,437,357
Borrowings	129,697
Subordinated notes payable, net	46,982	47,669
Accrued interest payable	1,020	936
Interest rate swaps liability	1,156
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	1,337,650	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