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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2025
 [1]
Sep. 30, 2025
 [1]
Jun. 30, 2025
 [1]
Mar. 31, 2025
 [1]
Dec. 31, 2024
 [1]
Sep. 30, 2024
 [1]
Jun. 30, 2024
 [1]
Mar. 31, 2024
 [1]
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of Comprehensive Income [Abstract]                      
Net income $ 128,828 $ 130,748 $ 120,721 $ 84,306 $ 94,408 $ 95,267 $ 96,507 $ 86,814 $ 464,603 $ 372,996 $ 366,313
Other comprehensive income on available-for-sale ("AFS") securities, net of tax                 89,466 30,855 81,521
Other comprehensive loss on cash flow hedge, net of tax                 (9,937) (6,249) (13,059)
Other comprehensive income on defined benefit pension plan, net of tax                 5,447 11,172 4,589
Total comprehensive income, net of tax                 $ 549,579 $ 408,774 $ 439,364
[1] For further information, see the related discussion “Quarterly Results” included in Management’s Discussion and Analysis.