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Consolidated Statements Of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Retained Earnings
Accumulated Other Comprehensive Income
Balance, beginning of period, shares at Dec. 31, 2021   1,895    
Balance, beginning of period at Dec. 31, 2021 $ 229,087 $ 0 $ 225,861 $ 3,226
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 6,185   6,185  
Dividends paid (873)   (873)  
Exercise of stock appreciation rights (in shares)   2    
Exercise of stock appreciation rights (1)   (1)  
Share-based compensation expense related to stock appreciation rights 102   102  
Accumulated postretirement benefit obligation adjustment 173     173
Net unrealized gain (loss) on investments (2,181)     (2,181)
Balance, end of period, shares at Mar. 31, 2022   1,897    
Balance, end of period at Mar. 31, 2022 232,492 $ 0 231,274 1,218
Balance, beginning of period, shares at Dec. 31, 2022   1,897    
Balance, beginning of period at Dec. 31, 2022 241,011 $ 0 240,811 200
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 1,181   1,181  
Dividends paid (873)   (873)  
Exercise of stock appreciation rights (in shares)   1    
Exercise of stock appreciation rights 0   0  
Share-based compensation expense related to stock appreciation rights 159   159  
Accumulated postretirement benefit obligation adjustment 111     111
Net unrealized gain (loss) on investments 249     249
Balance, end of period, shares at Mar. 31, 2023   1,898    
Balance, end of period at Mar. 31, 2023 $ 241,838 $ 0 $ 241,278 $ 560