Quarterly report pursuant to Section 13 or 15(d)

Changes in Equity (Details)

v3.23.2
Changes in Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 829,051 $ 772,887 $ 727,876 $ 651,711 $ 772,887 $ 651,711
Beginning balance, treasury stock (in shares)   60,477     60,477  
Net income 100,393 $ 86,568 118,894 97,900 $ 186,961 216,794
Share-based compensation, net of forfeitures 2,806 2,370 1,811 1,481    
Repurchases of common stock (19,708) (6,749) (25,534)      
Shares exchanged for tax withholdings   (939)        
Periodic pension costs, net of income taxes (26) (25) 8 8 (51) 16
Ending balance $ 887,550 829,051 $ 645,281 727,876 $ 887,550 $ 645,281
Ending balance, treasury stock (in shares) 77,011       77,011  
Cash dividends per share of common stock (in USD per share) $ 3.25   $ 23.00   $ 6.50 $ 26.00
Excise taxes collected $ 165 67        
Periodic pension costs (benefit), net of income taxes $ (8) $ (6) $ 2 $ 2 $ (14) $ 4
Common Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance (in shares) 7,693,320 7,695,679 7,745,290 7,744,695 7,695,679 7,744,695
Beginning balance $ 78 $ 78 $ 78 $ 78 $ 78 $ 78
Share-based compensation, net of forfeitures (in shares)   1,756 104 595    
Repurchases of common stock (in shares) (14,175) (3,627) (17,478)      
Shares exchanged for tax withholdings (in shares)   (488)        
Ending balance (in shares) 7,679,145 7,693,320 7,727,916 7,745,290 7,679,145 7,727,916
Ending balance $ 78 $ 78 $ 78 $ 78 $ 78 $ 78
Treasury Stock            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ (108,794) $ (104,139) $ (14,617) $ (15,417) $ (104,139) $ (15,417)
Beginning balance, treasury stock (in shares) 62,836 60,477 10,866 11,461 60,477 11,461
Share-based compensation, forfeitures (in shares)   (1,756) (104) (595)    
Share-based compensation, net of forfeitures   $ 3,033 $ 140 $ 800    
Repurchases of common stock (in shares) 14,175 3,627 17,478      
Repurchases of common stock $ (19,708) $ (6,749) $ (25,534)      
Shares exchanged for tax withholdings (in shares)   488        
Shares exchanged for tax withholdings   $ (939)        
Ending balance $ (128,502) $ (108,794) $ (40,011) $ (14,617) $ (128,502) $ (40,011)
Ending balance, treasury stock (in shares) 77,011 62,836 28,240 10,866 77,011 28,240
Additional Paid-in Capital            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance $ 7,733 $ 8,293 $ 1,505 $ 28 $ 8,293 $ 28
Share-based compensation, net of forfeitures 2,849 (560) 1,851 1,477    
Ending balance 10,582 7,733 3,356 1,505 10,582 3,356
Accum. Other Comp. Income (Loss)            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 2,491 2,516 (999) (1,007) 2,516 (1,007)
Periodic pension costs, net of income taxes (26) (25) 8 8    
Ending balance 2,465 2,491 (991) (999) 2,465 (991)
Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Beginning balance 927,543 866,139 741,909 668,029 866,139 668,029
Net income 100,393 86,568 118,894 97,900    
Share-based compensation, net of forfeitures (43) (103) (180) (796)    
Ending balance 1,002,927 927,543 682,849 741,909 $ 1,002,927 $ 682,849
Dividend Paid            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Dividends paid $ (24,966) $ (25,061) $ (23,188) $ (23,224)    
Cash dividends per share of common stock (in USD per share) $ 3.25 $ 3.25 $ 3.00 $ 3.00    
Dividend Paid | Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Dividends paid $ (24,966) $ (25,061) $ (23,188) $ (23,224)    
Special Dividend Paid            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Special dividends paid     $ (154,586)      
Cash dividends per share of common stock (in USD per share)     $ 20.00      
Special Dividend Paid | Retained Earnings            
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Special dividends paid     $ (154,586)