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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Retained Earnings
Stock in Rabbi Trust Assumed in Acquisition
Rabbi Trust Obligation
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021   35,629,000        
Beginning balance at Dec. 31, 2021 $ 1,230,575 $ 722,671 $ 532,874 $ (1,803) $ 1,803 $ (24,970)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 108,503   108,503      
Cash dividends declared (23,538)   (23,538)      
Change in Rabbi Trust Obligation 0     218 (218)  
Stock withheld for payment of taxes (in shares)   (17,000)        
Stock withheld for payment of taxes (603) $ (603)        
Stock-based compensation (in shares)   100,000        
Stock-based compensation 2,626 $ 2,626        
Other comprehensive loss (333,066)         (333,066)
Ending balance (in shares) at Sep. 30, 2022   35,712,000        
Ending balance at Sep. 30, 2022 984,497 $ 724,694 617,839 (1,585) 1,585 (358,036)
Beginning balance (in shares) at Jun. 30, 2022   35,684,000        
Beginning balance at Jun. 30, 2022 1,062,343 $ 723,956 587,739 (1,573) 1,573 (249,352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 37,949   37,949      
Cash dividends declared (7,849)   (7,849)      
Change in Rabbi Trust Obligation 0     (12) 12  
Stock-based compensation (in shares)   28,000        
Stock-based compensation 738 $ 738        
Other comprehensive loss (108,684)         (108,684)
Ending balance (in shares) at Sep. 30, 2022   35,712,000        
Ending balance at Sep. 30, 2022 $ 984,497 $ 724,694 617,839 (1,585) 1,585 (358,036)
Beginning balance (in shares) at Dec. 31, 2022 35,704,154 35,704,000        
Beginning balance at Dec. 31, 2022 $ 1,031,596 $ 725,153 648,418 (1,585) 1,585 (341,975)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 74,457   74,457      
Cash dividends declared (27,084)   (27,084)      
Change in Rabbi Trust Obligation 0     210 (210)  
Equity issued related to acquisition (in shares)   5,033,000        
Equity issued pursuant to acquisition $ 229,489 $ 229,489        
Stock options exercised (in shares) 194,998 195,000        
Stock options exercised $ 3,769 $ 3,769        
Stock withheld for payment of taxes (in shares)   (6,000)        
Stock withheld for payment of taxes (186) $ (186)        
Stock-based compensation (in shares)   159,000        
Stock-based compensation 4,419 $ 4,419        
Other comprehensive loss $ (58,777)         (58,777)
Ending balance (in shares) at Sep. 30, 2023 41,085,498 41,085,000        
Ending balance at Sep. 30, 2023 $ 1,257,683 $ 962,644 695,791 (1,375) 1,375 (400,752)
Beginning balance (in shares) at Jun. 30, 2023   41,083,000        
Beginning balance at Jun. 30, 2023 1,297,642 $ 960,851 674,933 (1,365) 1,365 (338,142)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 29,893   29,893      
Cash dividends declared (9,035)   (9,035)      
Change in Rabbi Trust Obligation 0     (10) 10  
Stock options exercised (in shares)   2,000        
Stock options exercised   $ 66        
Stock-based compensation 1,727 $ 1,727        
Other comprehensive loss $ (62,610)         (62,610)
Ending balance (in shares) at Sep. 30, 2023 41,085,498 41,085,000        
Ending balance at Sep. 30, 2023 $ 1,257,683 $ 962,644 $ 695,791 $ (1,375) $ 1,375 $ (400,752)