v3.26.1
Other Comprehensive Income (Loss) (Component Of 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
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Statement of Comprehensive Income [Abstract]                
Changes in pension plan assets and benefit obligations, Net-of-tax amount $ 19,607 $ 16,754 $ 19,607 $ 16,754 $ 19,607 $ (19,607) $ 16,754 $ 16,754
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax 0 0 0 0        
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax 0 0 0 0        
Unrealized gains on available-for-sale securities, Net-of-tax amount (36,508) (48,261) (36,508) (48,261) (28,161) (32,346) (51,413) (62,929)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax (8,347) 3,152 3,306 14,668        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 0 0 856 0        
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax (8,347) 3,152 (4,162) 14,668        
Total accumulated other comprehensive income (loss), Net-of-tax amount (16,901) (31,507) (16,901) (31,507) $ (8,554) $ (12,739) $ (34,659) $ (46,175)
Other comprehensive loss before reclassifications (8,347) 3,152 3,306 14,668        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 0 (856) 0        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 0 0 (1,084) 0        
Other comprehensive income (loss) (8,347) 3,152 (4,162) 14,668        
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax 0 0 1,084 0        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax $ 0 $ 0 $ 228 $ 0