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Loans and Allowance for Credit Losses - Loan portfolio aging analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Jun. 30, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 2,391,423 | $ 2,237,091
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,495 | 1,238
60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,117 | 1,369
Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 734 | 1,211
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 3,346 | 3,818
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,388,077 | 2,233,273
Residential Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 809,196 | 721,216
Residential Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 601 | 312
Residential Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 520 | 364
Residential Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 638 | 613
Residential Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,759 | 1,289
Residential Real Estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 807,437 | 719,927
Construction Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 147,617 | 134,284
Construction Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 30
Construction Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 30
Construction Real Estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 147,617 | 134,254
Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 963,299 | 889,793
Commercial Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 397 | 363
Commercial Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 471 |
Commercial Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable |  | 374
Commercial Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 868 | 737
Commercial Real Estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 962,431 | 889,056
Consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 81,049 | 77,674
Consumer loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 326 | 195
Consumer loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 120 | 66
Consumer loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 69 | 84
Consumer loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 515 | 345
Consumer loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 80,534 | 77,329
Commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 390,262 | 414,124
Commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 171 | 368
Commercial loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 6 | 939
Commercial loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 27 | 110
Commercial loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 204 | 1,417
Commercial loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 390,058 | $ 412,707

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