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Schedule I - Financial Information of the Registrant (Parent Company) - Balance Sheets (Additional Information) (Details) - $ / shares
Dec. 31, 2022
Dec. 31, 2021
Condensed Balance Sheet Statements, Captions [Line Items]    
Common stock, par value (in usd per share) $ 1 $ 1
Common stock, shares authorized (in shares) 51,500,000 51,500,000
Common stock, shares issued (in shares) 27,482,573 27,245,591
Common stock, shares outstanding (in shares) 27,130,412 26,893,430
Treasury stock, common shares (in shares) 352,161 352,161
Parent company    
Condensed Balance Sheet Statements, Captions [Line Items]    
Common stock, par value (in usd per share) $ 1 $ 1
Common stock, shares authorized (in shares) 51,500,000 51,500,000
Common stock, shares issued (in shares) 27,482,573 27,245,591
Common stock, shares outstanding (in shares) 27,130,412 26,893,430
Treasury stock, common shares (in shares) 352,161 352,161