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, 2022	Jun. 30, 2021
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
2022/2021	1,146,932	$ 1,034,652
2021/2020	721,665	433,293
2020/2019	251,984	182,774
2019/2018	103,484	118,958
2018/2017	78,834	115,845
Prior	148,060	143,946
Revolving loans	268,884	207,623
Total	2,719,843	2,237,091
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	1,107,991	1,015,117
2021/2020	718,973	420,483
2020/2019	248,814	169,879
2019/2018	102,783	115,613
2018/2017	78,116	101,993
Prior	144,948	142,556
Revolving loans	266,719	204,930
Total	2,668,344	2,170,571
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	6,147	6,415
2021/2020	1,276	2,697
2020/2019	2,939	11,235
2019/2018	62	1,399
2018/2017	668	815
Prior	2,216	819
Revolving loans	1,754	1,321
Total	15,062	24,701
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	9,297
2021/2020		8,806
2019/2018		1,793
2018/2017		12,826
Revolving loans		300
Total	9,297	23,725
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	22,670	13,120
2021/2020	1,416	1,307
2020/2019	231	810
2019/2018	639	153
2018/2017	50	211
Prior	896	571
Revolving loans	411	1,072
Total	26,313	17,244
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	827
2020/2019		850
Total	827	850
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	380,812	366,492
2021/2020	296,420	175,931
2020/2019	119,634	43,986
2019/2018	19,879	33,021
2018/2017	22,161	23,356
Prior	59,180	72,873
Revolving loans	6,074	5,557
Total	904,160	721,216
Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	380,502	361,876
2021/2020	295,260	175,772
2020/2019	118,464	43,576
2019/2018	19,383	32,929
2018/2017	22,143	23,267
Prior	58,545	71,592
Revolving loans	6,074	5,557
Total	900,371	714,569
Residential Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	44	328
2021/2020	242	70
2020/2019	1,083	410
2019/2018	56
2018/2017		89
Prior	30	809
Total	1,455	1,706
Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	266	4,288
2021/2020	918	89
2020/2019	87
2019/2018	440	92
2018/2017	18
Prior	605	472
Total	2,334	4,941
Construction Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	100,114	88,418
2021/2020	34,082	45,866
Revolving loans	220
Total	134,416	134,284
Construction Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	100,114	88,371
2021/2020	34,082	45,866
Revolving loans	220
Total	134,416	134,237
Construction Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021		47
Total		47
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	524,459	364,379
2021/2020	285,986	159,978
2020/2019	107,851	115,603
2019/2018	71,393	79,168
2018/2017	52,494	84,484
Prior	80,208	61,303
Revolving loans	24,282	24,878
Total	1,146,673	889,793
Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	487,486	351,732
2021/2020	284,736	147,670
2020/2019	105,893	104,746
2019/2018	71,380	75,967
2018/2017	51,804	70,927
Prior	78,115	61,194
Revolving loans	23,669	23,699
Total	1,103,083	835,935
Commercial Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	4,763	4,456
2021/2020	769	2,365
2020/2019	1,818	9,502
2019/2018		1,377
2018/2017	668	726
Prior	2,000	10
Revolving loans	548	810
Total	10,566	19,246
Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	9,297
2021/2020		8,806
2019/2018		1,793
2018/2017		12,826
Revolving loans		300
Total	9,297	23,725
Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	22,086	8,191
2021/2020	481	1,137
2020/2019	140	505
2019/2018	13	31
2018/2017	22	5
Prior	93	99
Revolving loans	65	69
Total	22,900	10,037
Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	827
2020/2019		850
Total	827	850
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	28,563	23,938
2021/2020	11,066	8,626
2020/2019	3,666	3,597
2019/2018	1,524	1,156
2018/2017	926	564
Prior	707	650
Revolving loans	46,544	39,143
Total	92,996	77,674
Consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	28,519	23,858
2021/2020	10,989	8,626
2020/2019	3,662	3,597
2019/2018	1,524	1,126
2018/2017	916	534
Prior	676	650
Revolving loans	46,521	39,071
Total	92,807	77,462
Consumer loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	21	80
2021/2020	71
Revolving loans		48
Total	92	128
Consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	23
2021/2020	6
2020/2019	4
2019/2018		30
2018/2017	10	30
Prior	31
Revolving loans	23	24
Total	97	84
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	112,984	191,425
2021/2020	94,111	42,892
2020/2019	20,833	19,588
2019/2018	10,688	5,613
2018/2017	3,253	7,441
Prior	7,965	9,120
Revolving loans	191,764	138,045
Total	441,598	414,124
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	111,370	189,280
2021/2020	93,906	42,549
2020/2019	20,795	17,960
2019/2018	10,496	5,591
2018/2017	3,253	7,265
Prior	7,612	9,120
Revolving loans	190,235	136,603
Total	437,667	408,368
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	1,319	1,551
2021/2020	194	262
2020/2019	38	1,323
2019/2018	6	22
Prior	186
Revolving loans	1,206	463
Total	2,949	3,621
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	295	594
2021/2020	11	81
2020/2019		305
2019/2018	186
2018/2017		176
Prior	167
Revolving loans	323	979
Total	$ 982	$ 2,135