v3.26.1
Other Comprehensive Income (Loss) (Component Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 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)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax 0 0    
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax 0 0    
Unrealized gains on available-for-sale securities, Net-of-tax amount (28,161) (51,413) (32,346) (62,929)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax 5,041 11,516    
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax (856)      
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax 4,185 11,516    
Total accumulated other comprehensive income (loss), Net-of-tax amount (8,554) (34,659) $ (12,739) $ (46,175)
Other comprehensive loss before reclassifications 5,041 11,516    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (856) 0    
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax (1,084) 0    
Other comprehensive income (loss) 4,185 11,516    
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax 1,084 0    
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax $ 228 $ 0