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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Capital Surplus [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2024 $ 4,127,636 $ 309,513 $ 1,719,609 $ 2,704,606 $ (606,092)
Balance, Shares Issued at Dec. 31, 2024   92,947      
Net income 119,504     119,504  
Other comprehensive income 91,120       91,120
Comprehensive income 210,624        
Dividends declared (39,460)     (39,460)  
Common stock activity, long-term incentive plans (464)   (471) 7  
Issuance of stock from dividend reinvestment and stock purchase plans 1,083   1,083    
Repurchase of common stock (20,747)   (20,747)    
Balance at Mar. 31, 2025 4,278,672 $ 309,513 1,699,474 2,784,657 (514,972)
Balance, Shares Issued at Mar. 31, 2025   92,947      
Balance at Dec. 31, 2025 $ 4,460,117 $ 309,513 1,491,219 3,035,636 (376,251)
Balance, Shares Issued at Dec. 31, 2025 92,947 92,947      
Net income $ 47,422     47,422  
Other comprehensive income 51,124       51,124
Comprehensive income 98,546        
Dividends declared (41,515)     (41,515)  
Common stock activity, long-term incentive plans (3,390)   (3,390)    
Issuance of stock from dividend reinvestment and stock purchase plans 1,211   1,211    
Repurchase of common stock (95,377)   (95,377)    
Balance at Mar. 31, 2026 $ 4,419,592 $ 309,513 $ 1,393,663 $ 3,041,543 $ (325,127)
Balance, Shares Issued at Mar. 31, 2026 92,947 92,947