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Short-Term and Other Borrowings - Summary of Federal Funds Purchased, Securities Sold Under Agreements to Repurchase and Other Short-term Borrowings (Detail) - Short Term Borrowings, FHLB advances [Member] - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Short-term Debt [Line Items] |  |  |  |  |
Outstanding balance | $ 500,500,000 |  | $ 500,500,000 |  | $ 338,000,000
Interest rate on balance | 5.43% |  | 5.43% |  | 5.41%
Maximum indebtedness | $ 501,500,000 | $ 302,000,000 | $ 501,500,000 | $ 540,000,000 |
Average balance | $ 440,670,000 | $ 242,395,000 | $ 384,679,000 | $ 306,952,000 |
Average rate paid | 5.46% | 5.15% | 5.45% | 4.84% |

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