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Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS and HTM | $ 1,117 | $ 478,793
Unrealized Losses, AFS and HTM | 5 | 33,147
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS and HTM | 2,628,150 | 2,263,197
Unrealized Losses, AFS and HTM | 484,839 | 520,099
Total |  |
Fair Value, AFS and HTM | 2,629,267 | 2,741,990
Unrealized Losses, AFS and HTM | 484,844 | 553,246
US Treasury Securities |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS | 0 | 168,758
Unrealized Losses, AFS | 0 | 5,662
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS | 172,570 | 0
Unrealized Losses, AFS | 2,215 | 0
Total |  |
Fair Value, AFS | 172,570 | 168,758
Unrealized Losses, AFS | 2,215 | 5,662
Government-sponsored enterprise securities |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS | 0 | 0
Unrealized Losses, AFS | 0 | 0
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS | 60,266 | 57,456
Unrealized Losses, AFS | 11,698 | 14,501
Total |  |
Fair Value, AFS | 60,266 | 57,456
Unrealized Losses, AFS | 11,698 | 14,501
Mortgage-backed securities |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS and HTM | 1,117 | 221,006
Unrealized Losses, AFS and HTM | 5 | 18,215
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS and HTM | 1,945,830 | 1,835,958
Unrealized Losses, AFS and HTM | 386,553 | 405,557
Total |  |
Fair Value, AFS and HTM | 1,946,947 | 2,056,964
Unrealized Losses, AFS and HTM | 386,558 | 423,772
Corporate bonds |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS | 0 | 40,644
Unrealized Losses, AFS | 0 | 947
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS | 17,008 | 886
Unrealized Losses, AFS | 917 | 114
Total |  |
Fair Value, AFS | 17,008 | 41,530
Unrealized Losses, AFS | 917 | 1,061
State and local governments |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, HTM | 0 | 48,385
Unrealized Losses, HTM | 0 | 8,323
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, HTM | 432,476 | 368,897
Unrealized Losses, HTM | 83,456 | 99,927
Total |  |
Fair Value, HTM | 432,476 | 417,282
Unrealized Losses, HTM | $ 83,456 | $ 108,250

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