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Loans and Allowance for Credit Losses - Loan portfolio aging analysis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 2,719,843 | $ 2,237,091
Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,715,257 | 2,233,273
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 4,586 | 3,818
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,432 | 1,238
60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 732 | 1,369
Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,422 | 1,211
PCD loans that were greater than 90 days past due | 0 | 0
Residential Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 904,160 | 721,216
Residential Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 901,694 | 719,927
Residential Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,466 | 1,289
Residential Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,402 | 312
Residential Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 364
Residential Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,064 | 613
Construction Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 134,416 | 134,284
Construction Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 134,416 | 134,254
Construction Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 30
Construction Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 30
Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,146,673 | 889,793
Commercial Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,145,354 | 889,056
Commercial Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,319 | 737
Commercial Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 416 | 363
Commercial Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 615 |
Commercial Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 288 | 374
Consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 92,996 | 77,674
Consumer loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 92,554 | 77,329
Consumer loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 442 | 345
Consumer loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 340 | 195
Consumer loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 45 | 66
Consumer loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 57 | 84
Commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 441,598 | 414,124
Commercial loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 441,239 | 412,707
Commercial loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 359 | 1,417
Commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 274 | 368
Commercial loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 72 | 939
Commercial loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 13 | $ 110

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