Securities & Allowance for Securities Credit Losses - Schedule of Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Amortized Cost
Within one year	$ 331,934
After one year through five years	260,349
After five years through ten years	13,904
Over ten years	4,712
Amortized Cost	610,899	$ 365,323
Fair Value
Within one year	332,360
After one year through five years	259,001
After five years through ten years	13,067
Over ten years	4,376
Total	608,804	358,329
Amortized Cost
Within one year	61,731
After one year through five years	144,317
After five years through ten years	46,934
Over ten years	3,656
Amortized Cost	256,638	300,653
Fair Value
Within one year	61,226
After one year through five years	138,031
After five years through ten years	42,808
Over ten years	3,211
Total	$ 245,276	$ 278,951