Loans and Allowance for Credit Losses - Credit risk profile based on rating category and year of origination (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	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	255,133	$ 1,034,652
Year One	925,921	433,293
Year Two	368,346	182,774
Year Three	164,897	118,958
Year Four	111,027	115,845
Prior	229,959	143,946
Revolving loans	228,017	207,623
Total	2,283,300	2,237,091
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	250,531	1,015,117
Year One	910,877	420,483
Year Two	355,664	169,879
Year Three	161,235	115,613
Year Four	108,274	101,993
Prior	214,995	142,556
Revolving loans	225,277	204,930
Total	2,226,853	2,170,571
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	807	6,415
Year One	6,368	2,697
Year Two	2,534	11,235
Year Three	2,178	1,399
Year Four	880	815
Prior	1,522	819
Revolving loans	1,316	1,321
Total	15,605	24,701
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year One		8,806
Year Two	8,806
Year Three		1,793
Year Four	1,793	12,826
Prior	12,826
Revolving loans	300	300
Total	23,725	23,725
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,795	13,120
Year One	8,676	1,307
Year Two	1,342	810
Year Three	648	153
Year Four	80	211
Prior	616	571
Revolving loans	1,124	1,072
Total	16,281	17,244
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year Two		850
Year Three	836
Total	836	850
Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	84,549	366,492
Year One	352,394	175,931
Year Two	166,051	43,986
Year Three	38,832	33,021
Year Four	30,823	23,356
Prior	84,042	72,873
Revolving loans	5,513	5,557
Total	762,204	721,216
Residential Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	83,975	361,876
Year One	348,844	175,772
Year Two	165,830	43,576
Year Three	38,339	32,929
Year Four	30,770	23,267
Prior	82,928	71,592
Revolving loans	5,513	5,557
Total	756,199	714,569
Residential Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	86	328
Year One	326	70
Year Two	70	410
Year Three	407
Year Four		89
Prior	801	809
Total	1,690	1,706
Residential Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	488	4,288
Year One	3,224	89
Year Two	151
Year Three	86	92
Year Four	53
Prior	313	472
Total	4,315	4,941
Construction Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40,324	88,418
Year One	57,677	45,866
Year Two	29,945
Total	127,946	134,284
Construction Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40,324	88,371
Year One	57,553	45,866
Year Two	29,945
Total	127,822	134,237
Construction Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year		47
Year One	124
Total	124	47
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	91,476	364,379
Year One	335,547	159,978
Year Two	136,417	115,603
Year Three	106,776	79,168
Year Four	74,406	84,484
Prior	130,764	61,303
Revolving loans	25,895	24,878
Total	901,281	889,793
Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	87,878	351,732
Year One	326,200	147,670
Year Two	124,280	104,746
Year Three	103,953	75,967
Year Four	71,713	70,927
Prior	117,116	61,194
Revolving loans	24,716	23,699
Total	855,856	835,935
Commercial Real Estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	291	4,456
Year One	4,614	2,365
Year Two	2,202	9,502
Year Three	1,718	1,377
Year Four	873	726
Prior	721	10
Revolving loans	810	810
Total	11,229	19,246
Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year One		8,806
Year Two	8,806
Year Three		1,793
Year Four	1,793	12,826
Prior	12,826
Revolving loans	300	300
Total	23,725	23,725
Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,307	8,191
Year One	4,733	1,137
Year Two	1,129	505
Year Three	269	31
Year Four	27	5
Prior	101	99
Revolving loans	69	69
Total	9,635	10,037
Commercial Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year Two		850
Year Three	836
Total	836	850
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,323	23,938
Year One	19,909	8,626
Year Two	6,885	3,597
Year Three	2,769	1,156
Year Four	857	564
Prior	1,067	650
Revolving loans	39,657	39,143
Total	80,467	77,674
Consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,322	23,858
Year One	19,800	8,626
Year Two	6,871	3,597
Year Three	2,767	1,126
Year Four	857	534
Prior	1,037	650
Revolving loans	39,609	39,071
Total	80,263	77,462
Consumer loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1	80
Year One	78
Revolving loans	48	48
Total	127	128
Consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year One	31
Year Two	14
Year Three	2	30
Year Four		30
Prior	30
Revolving loans		24
Total	77	84
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	29,461	191,425
Year One	160,394	42,892
Year Two	29,048	19,588
Year Three	16,520	5,613
Year Four	4,941	7,441
Prior	14,086	9,120
Revolving loans	156,952	138,045
Total	411,402	414,124
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	29,032	189,280
Year One	158,480	42,549
Year Two	28,738	17,960
Year Three	16,176	5,591
Year Four	4,934	7,265
Prior	13,914	9,120
Revolving loans	155,439	136,603
Total	406,713	408,368
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	429	1,551
Year One	1,350	262
Year Two	262	1,323
Year Three	53	22
Year Four	7
Revolving loans	458	463
Total	2,559	3,621
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year		594
Year One	564	81
Year Two	48	305
Year Three	291
Year Four		176
Prior	172
Revolving loans	1,055	979
Total	$ 2,130	$ 2,135