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Borrowings - Summary of Bancorps Short-term Borrowings (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Federal Reserve Bank Advances |  |  |
Short-term Debt [Line Items] |  |  |
Maximum outstanding at any month end | $ 0 | $ 0 | $ 0
Average balance during the year | $ 120,099 | $ 0 | $ 0
Weighted-average interest rate during the year | 5.23% | 0.00% | 0.00%
FHLB advances |  |  |
Short-term Debt [Line Items] |  |  |
Maximum outstanding at any month end | $ 0 | $ 775,000 | $ 850,000
Average balance during the year | $ 87,407 | $ 144,918 | $ 264,704
Weighted-average interest rate during the year | 5.16% | 1.07% | 2.35%
Federal Funds Purchased |  |  |
Short-term Debt [Line Items] |  |  |
Maximum outstanding at any month end | $ 0 | $ 895,000 | $ 365,000
Average balance during the year | $ 3,781 | $ 349,581 | $ 22,110
Weighted-average interest rate during the year | 4.97% | 1.66% | 0.07%

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