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Loans and Allowance for Credit Losses - Schedule of loan portfolio aging analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | ---
Residential real estate loans |  |
Financing Receivable Recorded Investment | $ 904 |
Financing Receivables Past Due |  |
Financing Receivable Recorded Investment | 7,655 | $ 6,393
Financing Receivables Past Due | Consumer Loan |  |
Financing Receivable Recorded Investment | 865 | 426
Financing Receivables Past Due | Commercial Loan |  |
Financing Receivable Recorded Investment | 1,746 | 2,122
Financing Receivables Past Due | Construction Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables Past Due | Residential real estate loans |  |
Financing Receivable Recorded Investment | 2,625 | 1,804
Financing Receivables Past Due | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 2,419 | 2,041
Loans Receivable |  |
Financing Receivable Recorded Investment |  | 2,171,463
Loans Receivable | Consumer Loan |  |
Financing Receivable Recorded Investment | 79,590 | 80,767
Loans Receivable | Commercial Loan |  |
Financing Receivable Recorded Investment | 427,345 | 468,448
Loans Receivable | Construction Real Estate |  |
Financing Receivable Recorded Investment | 112,994 | 107,472
Loans Receivable | Residential real estate loans |  |
Financing Receivable Recorded Investment | 636,690 | 627,357
Loans Receivable | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 902,564 | 887,419
Total Loans |  |
Financing Receivable Recorded Investment | 2,159,183 |
Financial Asset, 30 to 59 Days Past Due | Consumer Loan |  |
Financing Receivable Recorded Investment | 486 | 180
Financial Asset, 30 to 59 Days Past Due | Commercial Loan |  |
Financing Receivable Recorded Investment | 1,269 | 93
Financial Asset, 30 to 59 Days Past Due | Construction Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financial Asset, 30 to 59 Days Past Due | Residential real estate loans |  |
Financing Receivable Recorded Investment | 383 | 772
Financial Asset, 30 to 59 Days Past Due | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 923 | 641
Financial Asset, 30 to 59 Days Past Due | Total Loans |  |
Financing Receivable Recorded Investment | 3,061 | 1,686
Financial Asset, 60 to 89 Days Past Due | Consumer Loan |  |
Financing Receivable Recorded Investment | 152 | 53
Financial Asset, 60 to 89 Days Past Due | Commercial Loan |  |
Financing Receivable Recorded Investment | 83 | 1,219
Financial Asset, 60 to 89 Days Past Due | Construction Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financial Asset, 60 to 89 Days Past Due | Residential real estate loans |  |
Financing Receivable Recorded Investment | 944 | 378
Financial Asset, 60 to 89 Days Past Due | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 880 | 327
Financial Asset, 60 to 89 Days Past Due | Total Loans |  |
Financing Receivable Recorded Investment | 2,059 | 1,977
Financial Asset, Greater than 90 Days Past Due | Consumer Loan |  |
Financing Receivable Recorded Investment | 227 | 193
Financial Asset, Greater than 90 Days Past Due | Commercial Loan |  |
Financing Receivable Recorded Investment | 394 | 810
Financial Asset, Greater than 90 Days Past Due | Construction Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financial Asset, Greater than 90 Days Past Due | Residential real estate loans |  |
Financing Receivable Recorded Investment | 1,298 | 654
Financial Asset, Greater than 90 Days Past Due | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 616 | 1,073
Financial Asset, Greater than 90 Days Past Due | Total Loans |  |
Financing Receivable Recorded Investment | 2,535 | 2,730
Financing Receivables, Current | Consumer Loan |  |
Financing Receivable Recorded Investment | 78,725 | 80,341
Financing Receivables, Current | Commercial Loan |  |
Financing Receivable Recorded Investment | 425,599 | 466,326
Financing Receivables, Current | Construction Real Estate |  |
Financing Receivable Recorded Investment | 112,994 | 107,472
Financing Receivables, Current | Residential real estate loans |  |
Financing Receivable Recorded Investment | 634,065 | 625,553
Financing Receivables, Current | Commercial Real Estate |  |
Financing Receivable Recorded Investment | 900,145 | 885,378
Financing Receivables, Current | Total Loans |  |
Financing Receivable Recorded Investment | $ 2,151,528 | 2,165,070
Financing Receivables, Greater than 90 Days Past Due and Accruing | Consumer Loan |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables, Greater than 90 Days Past Due and Accruing | Commercial Loan |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables, Greater than 90 Days Past Due and Accruing | Construction Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables, Greater than 90 Days Past Due and Accruing | Residential real estate loans |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables, Greater than 90 Days Past Due and Accruing | Commercial Real Estate |  |
Financing Receivable Recorded Investment |  | 0
Financing Receivables, Greater than 90 Days Past Due and Accruing | Total Loans |  |
Financing Receivable Recorded Investment |  | $ 0

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