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Loans and Allowance for Credit Losses - Loan portfolio aging analysis (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Jun. 30, 2022
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 2,995,364,000 | $ 2,719,843,000
Greater than 90 Days Past Due and Accruing | 331,000 |
Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,986,513,000 | 2,715,257,000
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 8,851,000 | 4,586,000
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 4,477,000 | 2,432,000
60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 2,798,000 | 732,000
Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,576,000 | 1,422,000
PCD loans that were greater than 90 days past due | 0 | 0
Residential Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,029,793,000 | 904,160,000
Greater than 90 Days Past Due and Accruing | 331,000 |
Residential Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,026,336,000 | 901,694,000
Residential Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 3,457,000 | 2,466,000
Residential Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,727,000 | 1,402,000
Residential Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 862,000 |
Residential Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 868,000 | 1,064,000
Construction Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 155,148,000 | 134,416,000
Construction Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 155,148,000 | 134,416,000
Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,246,447,000 | 1,146,673,000
Commercial Real Estate | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,243,306,000 | 1,145,354,000
Commercial Real Estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 3,141,000 | 1,319,000
Commercial Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,868,000 | 416,000
Commercial Real Estate | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,075,000 | 615,000
Commercial Real Estate | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 198,000 | 288,000
Consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 103,756,000 | 92,996,000
Consumer loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 102,676,000 | 92,554,000
Consumer loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,080,000 | 442,000
Consumer loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 693,000 | 340,000
Consumer loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 130,000 | 45,000
Consumer loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 257,000 | 57,000
Commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 460,220,000 | 441,598,000
Commercial loans | Current Loans, not past due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 459,047,000 | 441,239,000
Commercial loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,173,000 | 359,000
Commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 189,000 | 274,000
Commercial loans | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 731,000 | 72,000
Commercial loans | Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 253,000 | $ 13,000

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