Loans - Financing Receivable Credit Quality Indicators, After Adoption of ASU 2016-13 (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Financing Receivable, Recorded Investment
Total loans, net of deferred loan costs	$ 2,769,396	$ 2,769,119
Commercial Loans
Financing Receivable, Recorded Investment
2021	85,400
2020	439,962
2019	272,959
2018	263,392
2017	232,085
Prior	335,349
Revolving	266,244
Total loans, net of deferred loan costs	1,895,391
Commercial Loans | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	80,816
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	80,816
Commercial Loans | Pass
Financing Receivable, Recorded Investment
2021	85,400
2020	439,641
2019	270,770
2018	261,959
2017	212,609
Prior	325,622
Revolving	256,601
Total loans, net of deferred loan costs	1,852,602
Commercial Loans | Pass | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	80,816
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	80,816
Commercial Loans | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	131
2019	1,522
2018	1,300
2017	14,043
Prior	4,222
Revolving	9,643
Total loans, net of deferred loan costs	30,861
Commercial Loans | Special Mention | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	174
2019	667
2018	133
2017	5,433
Prior	5,505
Revolving	0
Total loans, net of deferred loan costs	11,912
Commercial Loans | Substandard | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Doubtful | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Loss
Financing Receivable, Recorded Investment
2021	0
2020	16
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	16
Commercial Loans | Loss | Paycheck Protection Program
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Commercial real estate
Financing Receivable, Recorded Investment
2021	39,049
2020	178,921
2019	136,267
2018	206,582
2017	189,385
Prior	252,631
Revolving	65,420
Total loans, net of deferred loan costs	1,068,255
Commercial Loans | Commercial real estate | Pass
Financing Receivable, Recorded Investment
2021	39,049
2020	178,905
2019	136,267
2018	205,282
2017	179,598
Prior	244,649
Revolving	65,271
Total loans, net of deferred loan costs	1,049,021
Commercial Loans | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	1,300
2017	4,419
Prior	3,134
Revolving	149
Total loans, net of deferred loan costs	9,002
Commercial Loans | Commercial real estate | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	5,368
Prior	4,848
Revolving	0
Total loans, net of deferred loan costs	10,216
Commercial Loans | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Commercial real estate | Loss
Financing Receivable, Recorded Investment
2021	0
2020	16
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	16
Commercial Loans | Construction and development
Financing Receivable, Recorded Investment
2021	4,304
2020	12,761
2019	19,144
2018	9,042
2017	2,481
Prior	10,187
Revolving	158,838
Total loans, net of deferred loan costs	216,757
Commercial Loans | Construction and development | Pass
Financing Receivable, Recorded Investment
2021	4,304
2020	12,761
2019	19,144
2018	9,042
2017	2,481
Prior	9,010
Revolving	158,838
Total loans, net of deferred loan costs	215,580
Commercial Loans | Construction and development | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	624
Revolving	0
Total loans, net of deferred loan costs	624
Commercial Loans | Construction and development | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	553
Revolving	0
Total loans, net of deferred loan costs	553
Commercial Loans | Construction and development | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Construction and development | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Commercial and industrial
Financing Receivable, Recorded Investment
2021	7,657
2020	14,411
2019	24,612
2018	20,224
2017	29,488
Prior	14,044
Revolving	37,977
Total loans, net of deferred loan costs	148,413
Commercial Loans | Commercial and industrial | Pass
Financing Receivable, Recorded Investment
2021	7,657
2020	14,411
2019	23,496
2018	20,091
2017	19,799
Prior	13,747
Revolving	28,483
Total loans, net of deferred loan costs	127,684
Commercial Loans | Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	1,116
2018	0
2017	9,624
Prior	193
Revolving	9,494
Total loans, net of deferred loan costs	20,427
Commercial Loans | Commercial and industrial | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	133
2017	65
Prior	104
Revolving	0
Total loans, net of deferred loan costs	302
Commercial Loans | Commercial and industrial | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Commercial and industrial | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Equipment finance
Financing Receivable, Recorded Investment
2021	34,390
2020	131,532
2019	77,834
2018	7,057
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	250,813
Commercial Loans | Equipment finance | Pass
Financing Receivable, Recorded Investment
2021	34,390
2020	131,227
2019	76,761
2018	7,057
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	249,435
Commercial Loans | Equipment finance | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	131
2019	406
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	537
Commercial Loans | Equipment finance | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	174
2019	667
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	841
Commercial Loans | Equipment finance | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Equipment finance | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Municipal finance
Financing Receivable, Recorded Investment
2021	0
2020	21,521
2019	15,102
2018	20,487
2017	10,731
Prior	58,487
Revolving	4,009
Total loans, net of deferred loan costs	130,337
Commercial Loans | Municipal finance | Pass
Financing Receivable, Recorded Investment
2021	0
2020	21,521
2019	15,102
2018	20,487
2017	10,731
Prior	58,216
Revolving	4,009
Total loans, net of deferred loan costs	130,066
Commercial Loans | Municipal finance | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	271
Revolving	0
Total loans, net of deferred loan costs	271
Commercial Loans | Municipal finance | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Municipal finance | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Commercial Loans | Municipal finance | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans
Financing Receivable, Recorded Investment
2021	33,942
2020	109,329
2019	105,010
2018	98,755
2017	67,612
Prior	227,036
Revolving	232,321
Total loans, net of deferred loan costs	874,005
Retail Consumer Loans | Pass
Financing Receivable, Recorded Investment
2021	33,719
2020	108,182
2019	104,594
2018	97,844
2017	67,077
Prior	213,620
Revolving	231,447
Total loans, net of deferred loan costs	856,483
Retail Consumer Loans | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	4
2017	29
Prior	2,824
Revolving	0
Total loans, net of deferred loan costs	2,857
Retail Consumer Loans | Substandard
Financing Receivable, Recorded Investment
2021	223
2020	1,147
2019	416
2018	907
2017	506
Prior	10,390
Revolving	874
Total loans, net of deferred loan costs	14,463
Retail Consumer Loans | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	202
Revolving	0
Total loans, net of deferred loan costs	202
Retail Consumer Loans | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | One-to-four family
Financing Receivable, Recorded Investment
2021	20,156
2020	50,087
2019	66,389
2018	64,285
2017	52,183
Prior	201,485
Revolving	4,700
Total loans, net of deferred loan costs	459,285
Retail Consumer Loans | One-to-four family | Pass
Financing Receivable, Recorded Investment
2021	20,156
2020	49,079
2019	66,389
2018	64,066
2017	51,948
Prior	191,398
Revolving	4,700
Total loans, net of deferred loan costs	447,736
Retail Consumer Loans | One-to-four family | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	29
Prior	2,017
Revolving	0
Total loans, net of deferred loan costs	2,046
Retail Consumer Loans | One-to-four family | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	1,008
2019	0
2018	219
2017	206
Prior	7,868
Revolving	0
Total loans, net of deferred loan costs	9,301
Retail Consumer Loans | One-to-four family | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	202
Revolving	0
Total loans, net of deferred loan costs	202
Retail Consumer Loans | One-to-four family | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | HELOCs - originated
Financing Receivable, Recorded Investment
2021	1,021
2020	1,565
2019	1,638
2018	691
2017	790
Prior	12,263
Revolving	117,917
Total loans, net of deferred loan costs	135,885
Retail Consumer Loans | HELOCs - originated | Pass
Financing Receivable, Recorded Investment
2021	1,021
2020	1,565
2019	1,638
2018	691
2017	751
Prior	9,656
Revolving	117,713
Total loans, net of deferred loan costs	133,035
Retail Consumer Loans | HELOCs - originated | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	807
Revolving	0
Total loans, net of deferred loan costs	807
Retail Consumer Loans | HELOCs - originated | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	39
Prior	1,800
Revolving	204
Total loans, net of deferred loan costs	2,043
Retail Consumer Loans | HELOCs - originated | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | HELOCs - originated | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | HELOCs - purchased
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	61,535
Total loans, net of deferred loan costs	61,535
Retail Consumer Loans | HELOCs - purchased | Pass
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	60,875
Total loans, net of deferred loan costs	60,875
Retail Consumer Loans | HELOCs - purchased | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | HELOCs - purchased | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	660
Total loans, net of deferred loan costs	660
Retail Consumer Loans | HELOCs - purchased | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | HELOCs - purchased | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Construction and land/lots
Financing Receivable, Recorded Investment
2021	103
2020	17,279
2019	5,105
2018	2,130
2017	0
Prior	6,392
Revolving	47,790
Total loans, net of deferred loan costs	78,799
Retail Consumer Loans | Construction and land/lots | Pass
Financing Receivable, Recorded Investment
2021	103
2020	17,279
2019	5,105
2018	2,025
2017	0
Prior	5,874
Revolving	47,790
Total loans, net of deferred loan costs	78,176
Retail Consumer Loans | Construction and land/lots | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Construction and land/lots | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	105
2017	0
Prior	518
Revolving	0
Total loans, net of deferred loan costs	623
Retail Consumer Loans | Construction and land/lots | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Construction and land/lots | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Indirect auto finance
Financing Receivable, Recorded Investment
2021	11,876
2020	38,911
2019	25,435
2018	31,188
2017	14,431
Prior	6,625
Revolving	0
Total loans, net of deferred loan costs	128,466
Retail Consumer Loans | Indirect auto finance | Pass
Financing Receivable, Recorded Investment
2021	11,876
2020	38,790
2019	25,030
2018	30,623
2017	14,176
Prior	6,446
Revolving	0
Total loans, net of deferred loan costs	126,941
Retail Consumer Loans | Indirect auto finance | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Indirect auto finance | Substandard
Financing Receivable, Recorded Investment
2021	0
2020	121
2019	405
2018	565
2017	255
Prior	179
Revolving	0
Total loans, net of deferred loan costs	1,525
Retail Consumer Loans | Indirect auto finance | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Indirect auto finance | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Consumer
Financing Receivable, Recorded Investment
2021	786
2020	1,487
2019	6,443
2018	461
2017	208
Prior	271
Revolving	379
Total loans, net of deferred loan costs	10,035
Retail Consumer Loans | Consumer | Pass
Financing Receivable, Recorded Investment
2021	563
2020	1,469
2019	6,432
2018	439
2017	202
Prior	246
Revolving	369
Total loans, net of deferred loan costs	9,720
Retail Consumer Loans | Consumer | Special Mention
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	4
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	4
Retail Consumer Loans | Consumer | Substandard
Financing Receivable, Recorded Investment
2021	223
2020	18
2019	11
2018	18
2017	6
Prior	25
Revolving	10
Total loans, net of deferred loan costs	311
Retail Consumer Loans | Consumer | Doubtful
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	0
Retail Consumer Loans | Consumer | Loss
Financing Receivable, Recorded Investment
2021	0
2020	0
2019	0
2018	0
2017	0
Prior	0
Revolving	0
Total loans, net of deferred loan costs	$ 0