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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Thousands
Total
Preferred stock
Common stock
Surplus
Treasury stock
Retained earnings
Accumulated other comprehensive loss
Beginning balance at Dec. 31, 2023 $ 5,399,526 $ 412,500 $ 61,269 $ 1,943,806 $ (2,217) $ 3,345,399 $ (361,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 187,294         187,294  
Other comprehensive Income (loss), net of tax (123,917)           (123,917)
Cash dividends declared on common stock (27,227)         (27,227)  
Dividends on Series D and E preferred stock (6,991)         (6,991)  
Stock-based compensation 9,157     9,157      
Common stock issued for:              
Exercise of stock options 25   1 24      
Restricted stock awards (3,504)   505 (469) (3,540)    
Employee stock purchase plan 741   8 733      
Director compensation plan 1,296   15 1,281      
Ending balance at Mar. 31, 2024 5,436,400 412,500 61,798 1,954,532 (5,757) 3,498,475 (485,148)
Beginning balance at Dec. 31, 2024 6,344,297 412,500 66,560 2,482,561 (6,153) 3,897,164 (508,335)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 189,039         189,039  
Other comprehensive Income (loss), net of tax 98,320           98,320
Cash dividends declared on common stock (33,358)         (33,358)  
Dividends on Series D and E preferred stock (6,991)         (6,991)  
Stock-based compensation 10,411     10,411      
Common stock issued for:              
Exercise of stock options 219   5 214      
Restricted stock awards (3,003)   417 (417) (3,003)    
Employee stock purchase plan 775   7 768      
Director compensation plan 828   18 810      
Ending balance at Mar. 31, 2025 $ 6,600,537 $ 412,500 $ 67,007 $ 2,494,347 $ (9,156) $ 4,045,854 $ (410,015)