Loans and Allowance for Credit Losses - Credit risk profile based on rating category and year of origination (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Amount of loan relationships subject to annual credit analysis	$ 3,000
Loan relationships that are subject to independent annual review	1,000
2023 / 2022	1,112,842	$ 1,146,932
2022 / 2021	969,065	721,665
2021 / 2020	623,440	251,984
2020 / 2019	213,074	103,484
2019 / 2018	108,106	78,834
Prior	195,293	148,060
Revolving loans	397,377	268,884
Total	3,619,197	2,719,843
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	1,089,767	1,107,991
2022 / 2021	934,545	718,973
2021 / 2020	619,444	248,814
2020 / 2019	208,612	102,783
2019 / 2018	107,260	78,116
Prior	191,942	144,948
Revolving loans	393,419	266,719
Total	3,544,989	2,668,344
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	10,385	6,147
2022 / 2021	6,729	1,276
2021 / 2020	932	2,939
2020 / 2019	3,990	62
2019 / 2018	198	668
Prior	144	2,216
Revolving loans	2,554	1,754
Total	24,932	15,062
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	2,940	9,297
Total	2,940	9,297
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	9,750	22,670
2022 / 2021	27,791	1,416
2021 / 2020	3,064	231
2020 / 2019	472	639
2019 / 2018	648	50
Prior	3,207	896
Revolving loans	1,404	411
Total	46,336	26,313
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022		827
Total		827
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	330,193	380,812
2022 / 2021	314,305	296,420
2021 / 2020	253,203	119,634
2020 / 2019	103,843	19,879
2019 / 2018	25,849	22,161
Prior	96,919	59,180
Revolving loans	9,105	6,074
Total	1,133,417	904,160
Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	328,142	380,502
2022 / 2021	312,853	295,260
2021 / 2020	252,077	118,464
2020 / 2019	103,735	19,383
2019 / 2018	25,651	22,143
Prior	96,035	58,545
Revolving loans	9,100	6,074
Total	1,127,593	900,371
Residential Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	1,214	44
2022 / 2021	1,136	242
2021 / 2020	616	1,083
2020 / 2019	108	56
2019 / 2018	198
Prior	27	30
Revolving loans	5
Total	3,304	1,455
Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	837	266
2022 / 2021	316	918
2021 / 2020	510	87
2020 / 2019		440
2019 / 2018		18
Prior	857	605
Total	2,520	2,334
Construction Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	125,089	100,114
2022 / 2021	50,690	34,082
2021 / 2020	10,946
2020 / 2019	3,190
Revolving loans	941	220
Total	190,856	134,416
Construction Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	124,479	100,114
2022 / 2021	50,011	34,082
2021 / 2020	10,946
2020 / 2019	3,190
Revolving loans	941	220
Total	189,567	134,416
Construction Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	280
Total	280
Construction Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	330
2022 / 2021	679
Total	1,009
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	481,395	524,459
2022 / 2021	505,987	285,986
2021 / 2020	282,509	107,851
2020 / 2019	93,439	71,393
2019 / 2018	75,126	52,494
Prior	85,723	80,208
Revolving loans	38,200	24,282
Total	1,562,379	1,146,673
Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	462,643	487,486
2022 / 2021	474,140	284,736
2021 / 2020	279,921	105,893
2020 / 2019	89,272	71,380
2019 / 2018	74,653	51,804
Prior	83,871	78,115
Revolving loans	37,443	23,669
Total	1,501,943	1,103,083
Commercial Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	8,122	4,763
2022 / 2021	5,382	769
2021 / 2020	163	1,818
2020 / 2019	3,879
2019 / 2018		668
Prior	117	2,000
Revolving loans		548
Total	17,663	10,566
Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	2,940	9,297
Total	2,940	9,297
Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	7,690	22,086
2022 / 2021	26,465	481
2021 / 2020	2,425	140
2020 / 2019	288	13
2019 / 2018	473	22
Prior	1,735	93
Revolving loans	757	65
Total	39,833	22,900
Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022		827
Total		827
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	36,107	28,563
2022 / 2021	14,532	11,066
2021 / 2020	5,509	3,666
2020 / 2019	1,692	1,524
2019 / 2018	717	926
Prior	1,420	707
Revolving loans	73,538	46,544
Total	133,515	92,996
Consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	36,003	28,519
2022 / 2021	14,530	10,989
2021 / 2020	5,446	3,662
2020 / 2019	1,692	1,524
2019 / 2018	717	916
Prior	1,379	676
Revolving loans	73,225	46,521
Total	132,992	92,807
Consumer loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	71	21
2022 / 2021		71
2021 / 2020	62
Total	133	92
Consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	33	23
2022 / 2021	2	6
2021 / 2020	1	4
2019 / 2018		10
Prior	41	31
Revolving loans	313	23
Total	390	97
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	140,058	112,984
2022 / 2021	83,551	94,111
2021 / 2020	71,273	20,833
2020 / 2019	10,910	10,688
2019 / 2018	6,414	3,253
Prior	11,231	7,965
Revolving loans	275,593	191,764
Total	599,030	441,598
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	138,500	111,370
2022 / 2021	83,011	93,906
2021 / 2020	71,054	20,795
2020 / 2019	10,723	10,496
2019 / 2018	6,239	3,253
Prior	10,657	7,612
Revolving loans	272,710	190,235
Total	592,894	437,667
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	698	1,319
2022 / 2021	211	194
2021 / 2020	91	38
2020 / 2019	3	6
Prior		186
Revolving loans	2,549	1,206
Total	3,552	2,949
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023 / 2022	860	295
2022 / 2021	329	11
2021 / 2020	128
2020 / 2019	184	186
2019 / 2018	175
Prior	574	167
Revolving loans	334	323
Total	$ 2,584	$ 982