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Consolidated Statements of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock Issuance
Preferred Stock
Common Stock
Common Stock
Common Stock Issuance
Additional Paid-in Capital
Additional Paid-in Capital
Common Stock Issuance
Retained Earnings
Accumulated Other Comprehensive (Loss) Income
Treasury Stock, Common
Treasury Stock, Common
Common Stock Issuance
Beginning Balance at Dec. 31, 2021 $ 2,712,680   $ 192,878 $ 559,766   $ 1,519,873   $ 1,282,383 $ 27,411 $ (869,631)  
Beginning Balance (in shares) at Dec. 31, 2021     200 160,490              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net Income 286,981             286,981      
Other Comprehensive Income (Loss), Net of Tax (412,887)               (412,887)    
Stock issued 4,330     $ 653   3,677        
Stock issued (in shares)       261              
Reissuance of treasury stock pursuant to acquisition (in shares)       6,209              
Reissuance of treasury stock pursuant to acquisition 89,713         4,547       85,166  
Stock-based compensation awards (repurchases) 12,312         13,658          
Preferred stock dividend (10,248)             (10,248)      
Common stock cash dividends (108,358)             (108,358)      
Dividend reinvestment activity (in shares)       362              
Dividend reinvestment activity 5,234         85       5,149  
Stock-based compensation awards (repurchases) (in shares)       277              
Stock-based compensation awards (repurchases)       $ 1,092              
Stock-based compensation awards (repurchases)                   (2,438)  
Ending Balance at Dec. 31, 2022 2,579,757   $ 192,878 $ 561,511   1,541,840   1,450,758 (385,476) (781,754)  
Ending Balance (in shares) at Dec. 31, 2022     200 167,599              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Unrecognized pension and postretirement income (cost) 644                    
Amortization of net unrecognized pension and postretirement income (loss) 100                    
Net Income 284,280             284,280      
Other Comprehensive Income (Loss), Net of Tax 73,196               73,196    
Stock issued 3,160     $ 578   2,548       34  
Stock issued (in shares)       231              
Stock-based compensation awards (repurchases) 6,981         8,604          
Acquisition of treasury stock (77,056)                 (77,056)  
Acquisition of treasury stock (in shares)       (5,029)              
Preferred stock dividend (10,248)             (10,248)      
Common stock cash dividends (105,490)             (105,490)      
Dividend reinvestment activity (in shares)       408              
Dividend reinvestment activity 5,559         (132)       5,691  
Stock-based compensation awards (repurchases) (in shares)       592              
Stock-based compensation awards (repurchases)       $ 2,313              
Stock-based compensation awards (repurchases)                   (3,936)  
Ending Balance at Dec. 31, 2023 2,760,139   $ 192,878 $ 564,402   1,552,860   1,619,300 (312,280) (857,021)  
Ending Balance (in shares) at Dec. 31, 2023     200 163,801              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Unrecognized pension and postretirement income (cost) 4,777                    
Amortization of net unrecognized pension and postretirement income (loss) 57                    
Net Income 288,743             288,743      
Other Comprehensive Income (Loss), Net of Tax 24,461               24,461    
Stock issued   $ 275,412     $ 48,348   $ 227,052       $ 12
Stock issued (in shares)         19,339            
Stock-based compensation awards (repurchases) 5,686         8,400          
Acquisition of treasury stock (30,348)                 (30,348)  
Acquisition of treasury stock (in shares)       (1,934)              
Preferred stock dividend (10,248)             (10,248)      
Common stock cash dividends (122,175)             (122,175)      
Dividend reinvestment activity (in shares)       322              
Dividend reinvestment activity 5,655         902       4,753  
Stock-based compensation awards (repurchases) (in shares)       561              
Stock-based compensation awards (repurchases)       $ 2,116              
Stock-based compensation awards (repurchases)                   (4,830)  
Ending Balance at Dec. 31, 2024 3,197,325   $ 192,878 $ 614,866   $ 1,789,214   $ 1,775,620 $ (287,819) $ (887,434)  
Ending Balance (in shares) at Dec. 31, 2024     200 182,089              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Unrecognized pension and postretirement income (cost) 7,279                    
Amortization of net unrecognized pension and postretirement income (loss) $ (422)