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Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Amount |  |  |
Federal funds purchased, At period-end | $ 248,162 | $ 213,597 |
Securities sold under agreements to repurchase, At period-end | 241,023 | 342,820 |
Rate |  |  |
Repurchase agreement | 241,000 | 342,800 |
Carrying amount of the securities pledged to collateralize repurchase agreements | 7,463,871 | 8,189,780 |
Asset Pledged as Collateral [Member] |  |  |
Rate |  |  |
Carrying amount of the securities pledged to collateralize repurchase agreements | $ 410,400 | $ 443,200 |
Financing Receivable, Pledging Purpose [Extensible Enumeration] | Federal funds purchased, At period-end | Federal funds purchased, At period-end |
Federal funds purchased and securities sold under repurchase agreements | Minimum |  |  |
Information concerning federal funds purchased and securities sold under repurchase agreements |  |  |
Maturity period from the transaction date | 1 day |  |
Federal funds purchased and securities sold under repurchase agreements | Maximum |  |  |
Information concerning federal funds purchased and securities sold under repurchase agreements |  |  |
Maturity period from the transaction date | 3 days |  |
Maturity period as per policies | 9 months |  |
Federal funds purchased |  |  |
Amount |  |  |
At period-end | $ 248,162 | $ 213,597 | $ 381,195
Average for the year | 225,642 | 278,251 | 482,471
Maximum month-end balance | $ 268,346 | $ 370,876 | $ 508,248
Rate |  |  |
At period-end (as a percent) | 5.32% | 4.31% | 0.08%
Average for the year (as a percent) | 5.08% | 1.35% | 0.09%
Securities sold under agreements to repurchase |  |  |
Amount |  |  |
Securities sold under agreements to repurchase, At period-end | $ 241,022 | $ 342,820 | $ 400,044
Average for the year | 317,879 | 395,141 | 395,498
Maximum month-end balance | $ 386,627 | $ 458,580 | $ 435,302
Rate |  |  |
At period-end (as a percent) | 2.10% | 0.40% | 0.16%
Average for the year (as a percent) | 1.30% | 0.19% | 0.20%

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