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Consolidated Statements Of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Retained Earnings
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Shares, Outstanding   1,891    
Balance, beginning of period at Dec. 31, 2023 $ 251,553 $ 0 $ 250,915 $ 638
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 4,525   4,525  
Dividends paid (867)   (867)  
Repurchases of common stock (in shares)   (7)    
Repurchases of common stock (1,053)   (1,053)  
Share-based compensation expense related to stock appreciation rights 96   96  
Accumulated postretirement benefit obligation adjustment 0      
Net unrealized gain (loss) on investments (292)     (292)
Balance, end of period at Mar. 31, 2024 253,962 $ 0 253,616 346
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Shares, Outstanding   1,884    
Shares, Outstanding   1,886    
Balance, beginning of period at Dec. 31, 2024 251,773 $ 0 251,418 355
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 3,171   3,171  
Dividends paid (868)   (868)  
Share-based compensation expense related to stock appreciation rights 106   106  
Accumulated postretirement benefit obligation adjustment 56     56
Net unrealized gain (loss) on investments 174     174
Balance, end of period at Mar. 31, 2025 $ 254,412 $ 0 $ 253,827 $ 585
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Shares, Outstanding   1,886