Loans and Allowance for Credit Losses - Credit risk profile based on rating category and year of origination (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 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
Current fiscal year	911,947	$ 1,034,652
Year One	787,486	433,293
Year Two	296,892	182,774
Year Three	133,006	118,958
Year Four	85,092	115,845
Prior	167,203	143,946
Revolving loans	231,711	207,623
Total	2,613,337	2,237,091
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	854,843	1,015,117
Year One	783,176	420,483
Year Two	292,100	169,879
Year Three	132,545	115,613
Year Four	84,371	101,993
Prior	164,283	142,556
Revolving loans	228,975	204,930
Total	2,540,293	2,170,571
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	25,406	6,415
Year One	1,383	2,697
Year Two	4,592	11,235
Year Three	97	1,399
Year Four	681	815
Prior	2,308	819
Revolving loans	1,807	1,321
Total	36,274	24,701
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,115
Year One		8,806
Year Three		1,793
Year Four		12,826
Revolving loans		300
Total	9,115	23,725
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	21,756	13,120
Year One	2,927	1,307
Year Two	200	810
Year Three	364	153
Year Four	40	211
Prior	612	571
Revolving loans	929	1,072
Total	26,828	17,244
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	827
Year Two		850
Total	827	850
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	317,007	366,492
Year One	309,227	175,931
Year Two	144,884	43,986
Year Three	24,294	33,021
Year Four	25,036	23,356
Prior	67,182	72,873
Revolving loans	6,377	5,557
Total	894,007	721,216
Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	316,211	361,876
Year One	307,910	175,772
Year Two	143,706	43,576
Year Three	24,113	32,929
Year Four	25,018	23,267
Prior	66,773	71,592
Revolving loans	6,377	5,557
Total	890,108	714,569
Residential Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	46	328
Year One	244	70
Year Two	1,090	410
Year Three	58
Year Four		89
Prior	97	809
Total	1,535	1,706
Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	750	4,288
Year One	1,073	89
Year Two	88
Year Three	123	92
Year Four	18
Prior	312	472
Total	2,364	4,941
Construction Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	89,171	88,418
Year One	42,160	45,866
Revolving loans	134
Total	131,465	134,284
Construction Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	67,838	88,371
Year One	41,974	45,866
Revolving loans	134
Total	109,946	134,237
Construction Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	21,333
Total	21,333
Construction Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year		47
Year One	186
Total	186	47
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	396,641	364,379
Year One	311,435	159,978
Year Two	122,530	115,603
Year Three	93,134	79,168
Year Four	54,341	84,484
Prior	90,294	61,303
Revolving loans	23,539	24,878
Total	1,091,914	889,793
Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	363,133	351,732
Year One	308,930	147,670
Year Two	118,973	104,746
Year Three	93,121	75,967
Year Four	53,638	70,927
Prior	88,182	61,194
Revolving loans	22,386	23,699
Total	1,048,363	835,935
Commercial Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	2,940	4,456
Year One	857	2,365
Year Two	3,445	9,502
Year Three		1,377
Year Four	681	726
Prior	2,018	10
Revolving loans	548	810
Total	10,489	19,246
Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,115
Year One		8,806
Year Three		1,793
Year Four		12,826
Revolving loans		300
Total	9,115	23,725
Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	20,626	8,191
Year One	1,648	1,137
Year Two	112	505
Year Three	13	31
Year Four	22	5
Prior	94	99
Revolving loans	605	69
Total	23,120	10,037
Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	827
Year Two		850
Total	827	850
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	21,536	23,938
Year One	13,618	8,626
Year Two	4,636	3,597
Year Three	1,882	1,156
Year Four	1,104	564
Prior	838	650
Revolving loans	42,616	39,143
Total	86,230	77,674
Consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	21,536	23,858
Year One	13,535	8,626
Year Two	4,636	3,597
Year Three	1,882	1,126
Year Four	1,104	534
Prior	807	650
Revolving loans	42,616	39,071
Total	86,116	77,462
Consumer loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year		80
Year One	74
Revolving loans		48
Total	74	128
Consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	9
Year Three		30
Year Four		30
Prior	31
Revolving loans		24
Total	40	84
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	87,592	191,425
Year One	111,046	42,892
Year Two	24,842	19,588
Year Three	13,696	5,613
Year Four	4,611	7,441
Prior	8,889	9,120
Revolving loans	159,045	138,045
Total	409,721	414,124
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	86,125	189,280
Year One	110,827	42,549
Year Two	24,785	17,960
Year Three	13,429	5,591
Year Four	4,611	7,265
Prior	8,521	9,120
Revolving loans	157,462	136,603
Total	405,760	408,368
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,087	1,551
Year One	208	262
Year Two	57	1,323
Year Three	39	22
Prior	193
Revolving loans	1,259	463
Total	2,843	3,621
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	380	594
Year One	11	81
Year Two		305
Year Three	228
Year Four		176
Prior	175
Revolving loans	324	979
Total	$ 1,118	$ 2,135