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Loans Receivable - Loans Purchased by Portfolio Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchases of loans receivable | $ 75,159 | $ 9,657
Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchases of loans receivable | 13,931 |
Commercial and Industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchases of loans receivable | 45,306 | $ 9,657
Residential Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchases of loans receivable | $ 15,922 |

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