Loans and Allowance for Credit Losses on Loans - Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Jun. 30, 2024
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	$ 20,191	$ 20,309	$ 19,244	$ 21,212	$ 21,212
Charge-offs	(137)	(260)	(412)	(549)
Recoveries	41	56	107	129
Provision	1,101	277	2,257	922
Balance, end of period	21,196		21,196		19,244
Commercial Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	2,079	3,098	2,077	3,201	3,201
Charge-offs	(44)	(143)	(57)	(156)	(1,152)
Recoveries	9	9	27	27
Provision	112	83	109	(146)
Balance, end of period	2,156		2,156		2,077
Residential Real Estate [Member] \| Residential Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	4,531	4,010	4,237	2,794	2,794
Charge-offs	0	0	(44)	0	0
Recoveries	0	0	2	0
Provision	65	128	401	162
Balance, end of period	4,596		4,596		4,237
Real Estate [Member] \| Commercial Real Estate Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	12,933	12,523	12,218	14,839	14,839
Charge-offs	0	0	(5)	0	0
Recoveries	1	1	3	2
Provision	865	(28)	1,583	544
Balance, end of period	13,799		13,799		12,218
Home Equity [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	234	192	212	46	46
Charge-offs	0	0	(13)	0	0
Recoveries	0	0	0	0
Provision	6	7	41	36
Balance, end of period	240		240		212
Consumer [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	414	486	500	332	332
Charge-offs	(93)	(117)	(293)	(393)	(481)
Recoveries	31	46	75	100
Provision	53	$ 87	123	326
Balance, end of period	$ 405		$ 405		500
Cumulative Effect Adjustment for ASU Implementation [Member] \| Adoption of ASU No. 2016-13 [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				(1,332)	(1,332)
Cumulative Effect Adjustment for ASU Implementation [Member] \| Adoption of ASU No. 2016-13 [Member] \| Commercial Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				121	121
Cumulative Effect Adjustment for ASU Implementation [Member] \| Residential Real Estate [Member] \| Adoption of ASU No. 2016-13 [Member] \| Residential Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				1,182	1,182
Cumulative Effect Adjustment for ASU Implementation [Member] \| Real Estate [Member] \| Adoption of ASU No. 2016-13 [Member] \| Commercial Real Estate Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				(2,889)	(2,889)
Cumulative Effect Adjustment for ASU Implementation [Member] \| Home Equity [Member] \| Adoption of ASU No. 2016-13 [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				117	117
Cumulative Effect Adjustment for ASU Implementation [Member] \| Consumer [Member] \| Adoption of ASU No. 2016-13 [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				$ 137	$ 137

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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