Common Stock (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	40,000,000	40,000,000	40,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common stock, shares issued (in shares)	37,221,098	37,221,098	37,221,098
Common stock, shares, outstanding	37,221,098	37,221,098
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive stock options excluded from computation of earnings per share (in shares)	0	0	54,139