v3.26.3
Other Comprehensive Income (Loss) - Reclassifications Out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net gain (loss) on securities transactions $ 87 $ 67 $ (222) $ 153
Income tax expense (23,454) (29,895) (82,122) (88,182)
Compensation and employee benefits (67,958) (63,202) (201,443) (188,817)
Net income 69,159 71,720 226,724 207,729
Reclassification Adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net income (40) 1,145 (674) 3,581
Reclassification Adjustment | Available for sale debt securities:        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net gain (loss) on securities transactions 0 0 (806) 87
Income tax expense 0 0 224 (24)
Net income 0 0 (582) 63
Reclassification Adjustment | Cash flow hedges:        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Interest expense 131 2,056 270 6,285
Income tax expense (36) (582) (75) (1,780)
Net income 95 1,474 195 4,505
Reclassification Adjustment | Post-retirement obligations:        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Income tax expense 52 130 111 390
Compensation and employee benefits (187) (459) (398) (1,377)
Net income $ (135) $ (329) $ (287) $ (987)