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Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair value, AFS and HTM $ 181,075 $ 442,489
Unrealized losses, AFS and HTM 769 2,441
Securities in an Unrealized Loss Position for More than 12 Months    
Fair value, AFS and HTM 1,512,307 1,975,663
Unrealized losses, AFS and HTM 265,224 457,102
Total    
Fair value, AFS and HTM 1,693,382 2,418,152
Unrealized losses, AFS and HTM 265,993 459,543
US Treasury securities    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair value, AFS 19,959 120,581
Unrealized losses, AFS 46 470
Securities in an Unrealized Loss Position for More than 12 Months    
Fair value, AFS 0 0
Unrealized losses, AFS 0 0
Total    
Fair value, AFS 19,959 120,581
Unrealized losses, AFS 46 470
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 1,758 9,614
Unrealized losses, AFS 210 2,347
Total    
Fair value, AFS 1,758 9,614
Unrealized losses, AFS 210 2,347
Mortgage-backed securities    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair value, AFS and HTM 157,405 317,015
Unrealized losses, AFS and HTM 684 1,845
Securities in an Unrealized Loss Position for More than 12 Months    
Fair value, AFS and HTM 1,074,038 1,538,156
Unrealized losses, AFS and HTM 200,547 363,423
Total    
Fair value, AFS and HTM 1,231,443 1,855,171
Unrealized losses, AFS and HTM 201,231 365,268
Corporate bonds    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair value, AFS 3,711 380
Unrealized losses, AFS 39 51
Securities in an Unrealized Loss Position for More than 12 Months    
Fair value, AFS 0 13,562
Unrealized losses, AFS 0 438
Total    
Fair value, AFS 3,711 13,942
Unrealized losses, AFS 39 489
State and local governments    
Securities in an Unrealized Loss Position for Less than 12 Months    
Fair value, AFS and HTM 0 4,513
Unrealized losses, AFS and HTM 0 75
Securities in an Unrealized Loss Position for More than 12 Months    
Fair value, AFS and HTM 436,511 414,331
Unrealized losses, AFS and HTM 64,467 90,894
Total    
Fair value, AFS and HTM 436,511 418,844
Unrealized losses, AFS and HTM $ 64,467 $ 90,969