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Short-Term Borrowings - Summary of Federal Funds Purchased and Other Short-term Borrowings (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Federal Funds Purchased [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Maximum indebtedness during the year | $ 50,000,000 | $ 50,000,000 | $ 50,000,000
Average balance during the year | $ 137,000 | $ 137,000 | $ 228,000
Average rate paid during the year | 4.38% | 0.73% | 0.35%
Short Term Borrowings, FHLB advances [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Outstanding balance at year end | $ 393,700,000 |  |
Maximum indebtedness during the year | 435,500,000 |  | $ 102,700,000
Average balance during the year | $ 66,875,000 |  | $ 8,151,000
Average rate paid during the year | 3.84% |  | 1.64%
Interest rate on year end balance | 4.24% |  |

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