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Short-term Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Short-term Debt [Line Items] |  |  |
Ending Balance | $ 597,835 | $ 372,694 | $ 138,315
Average Balance | $ 439,556 | $ 144,834 | $ 119,801
Average Rate | 4.95% | 1.38% | 0.08%
Federal funds purchased |  |  |
Short-term Debt [Line Items] |  |  |
Ending Balance | $ 0 | $ 0 | $ 0
Average Balance | $ 712 | $ 1,553 | $ 0
Average Rate | 5.62% | 3.93% | 0.00%
Borrowings from FHLB |  |  |
Short-term Debt [Line Items] |  |  |
Ending Balance | $ 563,000 | $ 285,000 | $ 0
Average Balance | $ 379,712 | $ 41,529 | $ 0
Average Rate | 5.56% | 4.24% | 0.00%
Securities sold under agreements to repurchase |  |  |
Short-term Debt [Line Items] |  |  |
Ending Balance | $ 34,835 | $ 87,694 | $ 138,315
Average Balance | $ 59,132 | $ 101,752 | $ 119,801
Average Rate | 1.01% | 0.18% | 0.08%
Maximum [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Ending Balance | $ 597,835 | $ 372,694 | $ 138,315
Weighted Average [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Average Rate | 5.37% | 3.56% | 0.06%

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