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	Dec. 31, 2024	Jun. 30, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available-for-sale	$ 374,453	$ 350,001
Equity securities	371	328
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	166,443	190,395
Long-term certificates of deposit	2,577	2,831
Securities available-for-sale	374,453	350,001
Securities held-to-maturity	770,905	690,354
Equity securities	371	328
Federal Home Loan Bank stock	10,669	7,296
Net loans receivable	1,531,209	1,480,229
Accrued interest receivable	16,623	14,269
Interest rate swaps asset	757	585
Deposits	2,467,258	2,389,222
Borrowings	201,076	149,456
Subordinated notes payable, net	49,774	49,681
Accrued interest payable	1,135	1,551
Interest rate swaps liability	757	585
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	166,443	190,395
Long-term certificates of deposit	2,563	2,760
Securities available-for-sale	374,453	350,001
Securities held-to-maturity	719,523	630,241
Equity securities	371	328
Federal Home Loan Bank stock	10,669	7,296
Net loans receivable	1,452,668	1,387,325
Accrued interest receivable	16,623	14,269
Interest rate swaps asset	757	585
Deposits	2,466,667	2,388,305
Borrowings	201,387	149,438
Subordinated notes payable, net	47,738	46,114
Accrued interest payable	1,135	1,551
Interest rate swaps liability	757	585
Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	166,443	190,395
Long-term certificates of deposit	0	0
Securities available-for-sale	0	0
Securities held-to-maturity	0	0
Equity securities	371	328
Federal Home Loan Bank stock	0	0
Net loans receivable	0	0
Accrued interest receivable	0	0
Interest rate swaps asset	0	0
Deposits	0	0
Borrowings	0	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	0
Interest rate swaps liability	0	0
Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Long-term certificates of deposit	2,563	2,760
Securities available-for-sale	374,453	350,001
Securities held-to-maturity	719,523	630,241
Equity securities	0	0
Federal Home Loan Bank stock	10,669	7,296
Net loans receivable	0	0
Accrued interest receivable	16,623	14,269
Interest rate swaps asset	757	585
Deposits	2,466,667	2,388,305
Borrowings	201,387	149,438
Subordinated notes payable, net	47,738	46,114
Accrued interest payable	1,135	1,551
Interest rate swaps liability	757	585
Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
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	1,452,668	1,387,325
Accrued interest receivable	0	0
Interest rate swaps asset	0	0
Deposits	0	0
Borrowings	0	0
Subordinated notes payable, net	0	0
Accrued interest payable	0	0
Interest rate swaps liability	$ 0	$ 0