Schedule I - Financial Information of the Registrant (Parent Company) - Balance Sheets (Additional Information) (Details) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
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)	27,722,388	27,482,573
Common stock, shares outstanding (in shares)	27,370,227	27,130,412
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)	27,722,388	27,482,573
Common stock, shares outstanding (in shares)	27,370,227	27,130,412
Treasury stock, common shares (in shares)	352,161	352,161