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Loans and Allowance for Credit Losses - Classes of loans (Details) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) loan | Jun. 30, 2023 USD ($) loan | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | $ 3,998,414 | $ 3,978,393 |  |  |  |
Loans in Process | (226,969) | (359,196) |  |  |  |
Deferred loan fees, net | (251) | (299) |  |  |  |
Allowance for credit losses | (51,336) | (47,820) | $ (50,084) | $ (45,685) | $ (37,483) | $ (33,192)
Total loans | $ 3,719,858 | $ 3,571,078 |  |  |  |
Number of purchased participation loans | loan | 69 | 86 |  |  |  |
Purchased participation loans | $ 174,600 | $ 155,600 |  |  |  |
Residential Real Estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | 1,200,723 | 1,133,417 |  |  |  |
Allowance for credit losses | (15,357) | (15,641) | (15,096) | (13,465) | (12,499) | (8,908)
Construction Real Estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | 432,030 | 550,052 |  |  |  |
Allowance for credit losses | (2,347) | (2,664) | (2,864) | (3,638) | (2,754) | (2,220)
Commercial Real Estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | 1,608,935 | 1,562,379 |  |  |  |
Allowance for credit losses | (26,610) | (22,838) | (25,177) | (18,545) | (16,806) | (16,838)
Consumer loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | 140,123 | 133,515 |  |  |  |
Allowance for credit losses | (900) | (909) | (890) | (986) | (761) | (710)
Commercial loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans before fees gross | 616,603 | 599,030 |  |  |  |
Allowance for credit losses | $ (6,122) | $ (5,768) | $ (6,057) | $ (9,051) | $ (4,663) | $ (4,516)

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