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Loans and Allowance for Credit Losses - Collateral dependent loans and related ACL (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022
--- | --- | --- | --- | --- | --- | ---
Total Loans Receivable | $ 3,732,153 |  | $ 3,619,197 |  |  |
Related allowance for credit losses | 50,084 |  | 47,820 | $ 37,483 | $ 37,418 | $ 33,192
Collateral-dependent Loans |  |  |  |  |  |
Total Loans Receivable | 26,824 |  | 6,376 |  |  |
Related allowance for credit losses | 7,753 |  | 901 |  |  |
Residential Real Estate |  |  |  |  |  |
Total Loans Receivable | 1,160,264 |  | 1,133,417 |  |  |
Related allowance for credit losses | 15,096 | $ 14,846 | 15,641 | 12,499 | 11,937 | 8,908
Residential Real Estate | Collateral-dependent Loans | 1- to 4-family residential loans |  |  |  |  |  |
Total Loans Receivable | 814 |  | 837 |  |  |
Related allowance for credit losses | 133 |  | 156 |  |  |
Construction Real Estate |  |  |  |  |  |
Total Loans Receivable | 244,227 |  | 190,856 |  |  |
Related allowance for credit losses | 2,864 | $ 2,856 | 2,664 | 2,754 | 2,503 | 2,220
Construction Real Estate | Collateral-dependent Loans |  |  |  |  |  |
Total Loans Receivable |  |  | 642 |  |  |
Related allowance for credit losses |  |  | 79 |  |  |
Commercial Real Estate |  |  |  |  |  |
Total Loans Receivable | 1,558,600 |  | 1,562,379 |  |  |
Related allowance for credit losses | 25,177 |  | 22,838 | 16,806 | 17,886 | 16,838
Commercial Real Estate | Collateral-dependent Loans |  |  |  |  |  |
Total Loans Receivable | 25,142 |  | 4,897 |  |  |
Related allowance for credit losses | 7,250 |  | 666 |  |  |
Commercial loans |  |  |  |  |  |
Total Loans Receivable | 629,899 |  | 599,030 |  |  |
Related allowance for credit losses | 6,057 |  | $ 5,768 | $ 4,663 | $ 4,399 | $ 4,516
Commercial loans | Collateral-dependent Loans |  |  |  |  |  |
Total Loans Receivable | 868 |  |  |  |  |
Related allowance for credit losses | $ 370 |  |  |  |  |

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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, fee, after loan in process, of financing receivable. Excludes net investment in leases. + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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