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Consolidated Statements of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock, Common
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 205,148       205,148    
Other comprehensive income (loss) (470,358)         (470,358)  
Common stock issued (in shares)     180        
Common stock issued 883   $ 450 433     0
Dividend reinvestment activity (in shares)     253        
Dividend reinvestment activity 3,665     5     3,660
Reissuance of treasury stock pursuant to acquisition 89,713     4,547     85,166
Reissuance of treasury stock pursuant to acquisition (in shares)     6,209        
Stock-based compensation awards             (2,367)
Stock-based compensation awards     $ 1,056        
Stock-based compensation awards (in shares)     266        
Stock-based compensation awards 10,415     11,726      
Preferred stock dividend (7,686)       (7,686)    
Common stock cash dividends (73,301)       (73,301)    
Ending Balance at Sep. 30, 2022 2,471,159 $ 192,878 $ 561,272 1,536,584 1,406,544 (442,947) (783,172)
Ending Balance (in shares) at Sep. 30, 2022   200 167,398        
Beginning Balance at Jun. 30, 2022 2,471,093 $ 192,878 $ 561,181 1,527,756 1,363,344 (304,210) (869,856)
Beginning Balance (in shares) at Jun. 30, 2022   200 161,057        
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 70,871       70,871    
Other comprehensive income (loss) (138,737)         (138,737)  
Common stock issued (in shares)     35        
Common stock issued 188   $ 88 100     0
Dividend reinvestment activity (in shares)     96        
Dividend reinvestment activity 1,533     5     1,528
Reissuance of treasury stock pursuant to acquisition 89,713     4,547     85,166
Reissuance of treasury stock pursuant to acquisition (in shares)     6,209        
Stock-based compensation awards             (10)
Stock-based compensation awards     $ 3        
Stock-based compensation awards (in shares)     1        
Stock-based compensation awards 4,169     4,176      
Preferred stock dividend (2,562)       (2,562)    
Common stock cash dividends (25,109)       (25,109)    
Ending Balance at Sep. 30, 2022 2,471,159 $ 192,878 $ 561,272 1,536,584 1,406,544 (442,947) (783,172)
Ending Balance (in shares) at Sep. 30, 2022   200 167,398        
Beginning Balance at Dec. 31, 2022 2,579,757 $ 192,878 $ 561,511 1,541,840 1,450,758 (385,476) (781,754)
Beginning Balance (in shares) at Dec. 31, 2022   200 167,599        
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 220,017       220,017    
Other comprehensive income (loss) (87,280)         (87,280)  
Common stock issued (in shares)     185        
Common stock issued 2,491   $ 463 2,001     27
Dividend reinvestment activity (in shares)     298        
Dividend reinvestment activity 4,165     18     4,147
Stock-based compensation awards             (3,919)
Stock-based compensation awards     $ 2,305        
Stock-based compensation awards (in shares)     589        
Stock-based compensation awards 3,806     5,420      
Acquisition of treasury stock (in shares)     (4,587)        
Acquisition of treasury stock (70,940)           (70,940)
Preferred stock dividend (7,686)       (7,686)    
Common stock cash dividends (77,637)       (77,637)    
Ending Balance at Sep. 30, 2023 2,566,693 $ 192,878 $ 564,279 1,549,279 1,585,452 (472,756) (852,439)
Ending Balance (in shares) at Sep. 30, 2023   200 164,084        
Beginning Balance at Jun. 30, 2023 2,642,152 $ 192,878 $ 564,137 1,545,706 1,542,163 (379,286) (823,446)
Beginning Balance (in shares) at Jun. 30, 2023   200 166,097        
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 72,097       72,097    
Other comprehensive income (loss) (93,470)         (93,470)  
Common stock issued (in shares)     50        
Common stock issued 661   $ 125 529     7
Dividend reinvestment activity (in shares)     109        
Dividend reinvestment activity 1,363     (154)     1,517
Stock-based compensation awards             (26)
Stock-based compensation awards     $ 17        
Stock-based compensation awards (in shares)     4        
Stock-based compensation awards 3,189     3,198      
Acquisition of treasury stock (in shares)     (2,176)        
Acquisition of treasury stock (30,491)           (30,491)
Preferred stock dividend (2,562)       (2,562)    
Common stock cash dividends (26,246)       (26,246)    
Ending Balance at Sep. 30, 2023 $ 2,566,693 $ 192,878 $ 564,279 $ 1,549,279 $ 1,585,452 $ (472,756) $ (852,439)
Ending Balance (in shares) at Sep. 30, 2023   200 164,084