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Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
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Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, AFS and HTM | $ 147,713 | $ 442,489
Unrealized losses, AFS and HTM | 468 | 2,441
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, AFS and HTM | 1,994,383 | 1,975,663
Unrealized losses, AFS and HTM | 411,421 | 457,102
Total |  |
Fair value, AFS and HTM | 2,142,096 | 2,418,152
Unrealized losses, AFS and HTM | 411,889 | 459,543
U.S. Treasuries |  |
Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, AFS |  | 120,581
Unrealized losses, AFS |  | 470
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, AFS |  | 0
Unrealized losses, AFS |  | 0
Total |  |
Fair Value, AFS |  | 120,581
Unrealized losses, AFS |  | 470
Government-sponsored enterprise securities |  |
Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, AFS | 0 | 0
Unrealized losses, AFS | 0 | 0
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, AFS | 9,938 | 9,614
Unrealized losses, AFS | 2,025 | 2,347
Total |  |
Fair Value, AFS | 9,938 | 9,614
Unrealized losses, AFS | 2,025 | 2,347
Mortgage-backed securities |  |
Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, AFS and HTM | 142,720 | 317,015
Unrealized losses, AFS and HTM | 353 | 1,845
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, AFS and HTM | 1,553,577 | 1,538,156
Unrealized losses, AFS and HTM | 322,100 | 363,423
Total |  |
Fair value, AFS and HTM | 1,696,297 | 1,855,171
Unrealized losses, AFS and HTM | 322,453 | 365,268
Corporate bonds |  |
Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, AFS | 400 | 380
Unrealized losses, AFS | 34 | 51
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, AFS | 13,944 | 13,562
Unrealized losses, AFS | 56 | 438
Total |  |
Fair Value, AFS | 14,344 | 13,942
Unrealized losses, AFS | 90 | 489
State and local governments |  |
Securities in an Unrealized Loss Position for Less than Twelve Months |  |
Fair value, HTM | 4,593 | 4,513
Unrealized losses, HTM | 81 | 75
Securities in an Unrealized Loss Position for More than Twelve Months |  |
Fair value, HTM | 416,924 | 414,331
Unrealized losses, HTM | 87,240 | 90,894
Total |  |
Fair value, HTM | 421,517 | 418,844
Unrealized losses, HTM | $ 87,321 | $ 90,969

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