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Consolidated Statements of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock
Common Stock
Surplus
Retained Earnings
Other Comprehensive Income (Loss)
Treasury Stock
Total
Balance at Dec. 31, 2021   $ 96,351 $ 152,144 $ 2,470,710 $ (31,980) $ (378,744) $ 2,308,481
Balance (in shares) at Dec. 31, 2021 96,351            
Increase (decrease) in shareholders' equity              
Net Income (Loss)       300,232     300,232
Dividends:              
Dividends Payable/ Cash       (75,375)     (75,375)
Purchase of treasury stock           (52,048) (52,048)
Exercise of stock options   69 1,468       1,537
Exercise of stock options (in shares) 69            
Stock compensation expense recognized in earnings     449       449
Other comprehensive income (loss), net of tax:              
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments         (438,517)   (438,517)
Balance at Dec. 31, 2022   96,420 154,061 2,695,567 (470,497) (430,792) 2,044,759
Balance (in shares) at Dec. 31, 2022 96,420            
Increase (decrease) in shareholders' equity              
Net Income (Loss)       411,768     411,768
Dividends:              
Dividends Payable/ Cash       (78,247)     (78,247)
Purchase of treasury stock           (4,611) (4,611)
Exercise of stock options   47 1,120       1,167
Exercise of stock options (in shares) 47            
Stock compensation expense recognized in earnings     330       330
Other comprehensive income (loss), net of tax:              
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments         72,608   72,608
Balance at Dec. 31, 2023   96,467 155,511 3,029,088 (397,889) (435,403) 2,447,774
Balance (in shares) at Dec. 31, 2023 96,467            
Increase (decrease) in shareholders' equity              
Net Income (Loss)       409,167     409,167
Dividends:              
Dividends Payable/ Cash       (82,078)     (82,078)
Purchase of treasury stock           (963) (963)
Exercise of stock options   150 3,608       3,758
Exercise of stock options (in shares) 150            
Stock compensation expense recognized in earnings     214       214
Other comprehensive income (loss), net of tax:              
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments         18,835   18,835
Balance at Dec. 31, 2024   $ 96,617 $ 159,333 $ 3,356,177 $ (379,054) $ (436,366) $ 2,796,707
Balance (in shares) at Dec. 31, 2024 96,617