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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Capital in Excess of Par Value
Retained Earnings
Total
Balance at Dec. 31, 2023 $ 3,447   $ 148,141 $ 151,588
Balance (in shares) at Dec. 31, 2023 34,467      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net $ 30 $ 926   956
Stock issued for stock incentive plans, net (in shares) 301      
Stock purchased and retired $ (8) (926) 27 (907)
Stock purchased and retired (in shares) (85)      
Net income     4,597 4,597
Cash dividends     (4,852) (4,852)
Balance at Mar. 31, 2024 $ 3,469   147,913 151,382
Balance (in shares) at Mar. 31, 2024 34,683      
Balance at Dec. 31, 2023 $ 3,447   148,141 151,588
Balance (in shares) at Dec. 31, 2023 34,467      
Increase (Decrease) in Stockholders' Equity        
Net income       13,586
Balance at Sep. 30, 2024 $ 3,471   125,320 128,791
Balance (in shares) at Sep. 30, 2024 34,713      
Balance at Mar. 31, 2024 $ 3,469   147,913 151,382
Balance (in shares) at Mar. 31, 2024 34,683      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net $ 3 1,424   1,427
Stock issued for stock incentive plans, net (in shares) 35      
Stock purchased and retired   (1,424) 1,424  
Net income     5,585 5,585
Cash dividends     (29,138) (29,138)
Balance at Jun. 30, 2024 $ 3,472   125,784 129,256
Balance (in shares) at Jun. 30, 2024 34,718      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net   1,012   1,012
Stock issued for stock incentive plans, net (in shares) (2)      
Stock purchased and retired $ (1) (1,012) 987 (26)
Stock purchased and retired (in shares) (3)      
Net income     3,404 3,404
Cash dividends     (4,855) (4,855)
Balance at Sep. 30, 2024 $ 3,471   125,320 128,791
Balance (in shares) at Sep. 30, 2024 34,713      
Balance at Dec. 31, 2024 $ 3,471   125,532 129,003
Balance (in shares) at Dec. 31, 2024 34,707      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net $ 36 1,105   1,141
Stock issued for stock incentive plans, net (in shares) 363      
Stock purchased and retired $ (12) (1,105) 62 (1,055)
Stock purchased and retired (in shares) (115)      
Net income     2,206 2,206
Cash dividends     (4,894) (4,894)
Balance at Mar. 31, 2025 $ 3,495   122,906 126,401
Balance (in shares) at Mar. 31, 2025 34,955      
Balance at Dec. 31, 2024 $ 3,471   125,532 129,003
Balance (in shares) at Dec. 31, 2024 34,707      
Increase (Decrease) in Stockholders' Equity        
Net income       9,018
Balance at Sep. 30, 2025 $ 3,500   122,756 126,256
Balance (in shares) at Sep. 30, 2025 34,999      
Balance at Mar. 31, 2025 $ 3,495   122,906 126,401
Balance (in shares) at Mar. 31, 2025 34,955      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net $ 4 1,565   1,569
Stock issued for stock incentive plans, net (in shares) 41      
Stock purchased and retired   (1,565) 1,565  
Net income     4,162 4,162
Cash dividends     (4,901) (4,901)
Balance at Jun. 30, 2025 $ 3,499   123,732 127,231
Balance (in shares) at Jun. 30, 2025 34,996      
Increase (Decrease) in Stockholders' Equity        
Stock issued for stock incentive plans, net $ 1 1,274   1,275
Stock issued for stock incentive plans, net (in shares) 3      
Stock purchased and retired   $ (1,274) 1,274  
Net income     2,650 2,650
Cash dividends     (4,900) (4,900)
Balance at Sep. 30, 2025 $ 3,500   $ 122,756 $ 126,256
Balance (in shares) at Sep. 30, 2025 34,999