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Consolidated Statements of Changes in Shareholders' Equity (unaudited) - USD ($)
$ in Thousands
Common Stock
Surplus
Retained Earnings
Cumulative Effect of Adoption of ASU
Retained Earnings
Accumulated Other Comprehensive Loss
Cumulative Effect of Adoption of ASU
Total
Balance at Dec. 31, 2022 $ 189,261 $ 4,215,712   $ 1,347,042 $ (677,088)   $ 5,074,927
Balance (in shares) at Dec. 31, 2022 75,704,563            
Increase (Decrease) in Stockholders' Equity              
Net Income (Loss)       139,926     139,926
Other comprehensive income (loss), net of tax effects         63,304   63,304
Total comprehensive income             203,230
Cash dividends declared on common stock per share       (37,912)     (37,912)
Cash dividend equivalents paid on restricted stock units       (420)     (420)
Stock options exercised $ 59 1,114         1,173
Stock options exercised (in shares) 23,516            
Restricted stock awards (forfeits) $ (5) 5          
Restricted stock awards (forfeits) (in shares) (2,233)            
Stock issued pursuant to restricted stock units $ 444 (444)          
Stock issued pursuant to restricted stock units (in shares) 177,708            
Common stock repurchased - equity plans $ (110) (3,306)         (3,416)
Common stock repurchased - equity plans (in shares) (43,889)            
Share-based compensation expense   11,422         11,422
Balance at Mar. 31, 2023 $ 189,649 4,224,503   1,448,636 (613,784)   5,249,004
Balance (in shares) at Mar. 31, 2023 75,859,665            
Balance at Dec. 31, 2022 $ 189,261 4,215,712   1,347,042 (677,088)   5,074,927
Balance (in shares) at Dec. 31, 2022 75,704,563            
Balance at Dec. 31, 2023 $ 190,055 4,240,413   1,685,166 (582,536)   $ 5,533,098
Balance (in shares) at Dec. 31, 2023 76,022,039           76,022,039
Increase (Decrease) in Stockholders' Equity              
Net Income (Loss)       115,056     $ 115,056
Other comprehensive income (loss), net of tax effects         (40,458)   (40,458)
Total comprehensive income             74,598
Cash dividends declared on common stock per share       (39,598)     (39,598)
Cash dividend equivalents paid on restricted stock units       (1,163)     (1,163)
Stock options exercised $ 16 375         391
Stock options exercised (in shares) 6,349            
Restricted stock awards (forfeits) $ (1) 1          
Restricted stock awards (forfeits) (in shares) (64)            
Stock issued pursuant to restricted stock units $ 861 (861)          
Stock issued pursuant to restricted stock units (in shares) 344,376            
Common stock repurchased - buyback plan $ (250) (7,735)         (7,985)
Common stock repurchased - buyback plan (in shares) (100,000)            
Common stock repurchased - equity plans $ (238) (7,715)         (7,953)
Common stock repurchased - equity plans (in shares) (95,537)            
Share-based compensation expense   5,867         5,867
Balance (Accounting Standards Update 2023-02) at Mar. 31, 2024     $ (10,246)     $ (10,246)  
Balance at Mar. 31, 2024 $ 190,443 $ 4,230,345   $ 1,749,215 $ (622,994)   $ 5,547,009
Balance (in shares) at Mar. 31, 2024 76,177,163           76,177,163