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Statements of Common Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2021 $ 88,230 $ 64,392 $ 152,622
Balance (in shares) at Dec. 31, 2021 13,112,948    
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Net income $ 0 19,580 19,580
Cash dividends declared 0 (11,009) (11,009)
Issuance of common stock $ 43,970 0 43,970
Issuance of common stock (in shares) 1,121,940    
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans $ 1,741 0 1,741
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares) 42,739    
Stock-based compensation $ 279 0 279
Stock-based compensation (in shares) 7,957    
Balance at Dec. 31, 2022 $ 134,220 72,963 $ 207,183
Balance (in shares) at Dec. 31, 2022 14,285,584   14,285,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Net income $ 0 23,757 $ 23,757
Cash dividends declared 0 (11,716) (11,716)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans $ 1,654 0 1,654
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares) 41,702    
Stock-based compensation $ 300 0 300
Stock-based compensation (in shares) 4,959    
Balance at Dec. 31, 2023 $ 136,174 $ 85,004 $ 221,178
Balance (in shares) at Dec. 31, 2023 14,332,245   14,332,245