v3.26.1
Other Comprehensive Income - Pretax and Related Income Tax Benefit (Expense) Components of the Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassifications $ 229,928 $ 246,089 $ 436,756 $ 480,770
Income tax benefit (expense) (47,783) (53,607) (89,308) (102,828)
Net Income 182,145 192,482 347,448 377,942
Reclassification from Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassifications (2,937) (8,170) (3,225) (14,209)
Income tax benefit (expense) 617 1,716 678 2,984
Net Income (2,320) (6,454) (2,547) (11,225)
Reclassification from Accumulated Other Comprehensive Income | Net unrealized gains and (losses) on available-for-sale securities        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassifications (2,747) (4,432) (2,845) (10,413)
Income tax benefit (expense) 577 931 598 2,187
Net Income (2,170) (3,501) (2,247) (8,226)
Reclassification from Accumulated Other Comprehensive Income | Net benefit plan assets and (obligations) recognized in shareholders' equity        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassifications (190) (3,738) (380) (3,796)
Income tax benefit (expense) 40 785 80 797
Net Income $ (150) $ (2,953) $ (300) $ (2,999)