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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period Of Adoption, Adjustment
Common Stock
Retained Earnings
Retained Earnings
Cumulative Effect, Period Of Adoption, Adjustment
Stock in Rabbi Trust Assumed in Acquisition
Rabbi Trust Obligation
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020     28,579,000          
Beginning balance at Dec. 31, 2020 $ 893,421 $ (17,051) $ 400,582 $ 478,489 $ (17,051) $ (2,243) $ 2,243 $ 14,350
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 57,479     57,479        
Cash dividends declared (11,386)     (11,386)        
Change in Rabbi Trust obligation 0         315 (315)  
Stock repurchases (in shares)     (107,000)          
Stock repurchases (4,036)   $ (4,036)          
Stock withheld for payment of taxes (in shares)     (7,000)          
Stock withheld for payment of taxes (324)   $ (324)          
Stock-based compensation (in shares)     27,000          
Stock-based compensation 1,482   $ 1,482          
Other comprehensive income (15,075)             (15,075)
Ending balance (in shares) at Jun. 30, 2021     28,492,000          
Ending balance at Jun. 30, 2021 $ 904,510   $ 397,704 507,531   (1,928) 1,928 (725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Dividends declared per common share (in dollars per share) $ 0.40              
Beginning balance (in shares) at Mar. 31, 2021     28,489,000          
Beginning balance at Mar. 31, 2021 $ 876,853   $ 397,094 483,944   (2,256) 2,256 (4,185)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 29,285     29,285        
Cash dividends declared (5,698)     (5,698)        
Change in Rabbi Trust obligation 0         328 (328)  
Stock withheld for payment of taxes (in shares)     (4,000)          
Stock withheld for payment of taxes (221)   $ (221)          
Stock-based compensation (in shares)     7,000          
Stock-based compensation 831   $ 831          
Other comprehensive income 3,460             3,460
Ending balance (in shares) at Jun. 30, 2021     28,492,000          
Ending balance at Jun. 30, 2021 $ 904,510   $ 397,704 507,531   (1,928) 1,928 (725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Dividends declared per common share (in dollars per share) $ 0.20              
Beginning balance (in shares) at Dec. 31, 2021 35,629,177   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 70,554     70,554        
Cash dividends declared (15,689)     (15,689)        
Change in Rabbi Trust obligation 0         230 (230)  
Stock withheld for payment of taxes (in shares)     (17,000)          
Stock withheld for payment of taxes (603)   $ (603)          
Stock-based compensation (in shares)     72,000          
Stock-based compensation 1,888   $ 1,888          
Other comprehensive income $ (224,382)             (224,382)
Ending balance (in shares) at Jun. 30, 2022 35,683,595   35,684,000          
Ending 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]                
Dividends declared per common share (in dollars per share) $ 0.44              
Beginning balance (in shares) at Mar. 31, 2022     35,640,000          
Beginning balance at Mar. 31, 2022 $ 1,117,490   $ 723,441 559,004   (1,814) 1,814 (164,955)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 36,585     36,585        
Cash dividends declared (7,850)     (7,850)        
Change in Rabbi Trust obligation 0         241 (241)  
Stock withheld for payment of taxes (in shares)     (14,000)          
Stock withheld for payment of taxes (486)   $ (486)          
Stock-based compensation (in shares)     58,000          
Stock-based compensation 1,001   $ 1,001          
Other comprehensive income $ (84,397)             (84,397)
Ending balance (in shares) at Jun. 30, 2022 35,683,595   35,684,000          
Ending 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]                
Dividends declared per common share (in dollars per share) $ 0.22