Capital Stock - Common Stock Outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Stock, Shares, Outstanding [Roll Forward]
Common stock, shares outstanding, beginning of period (shares)	53,689,539
Common stock, shares outstanding, end of period (shares)	53,730,566	53,689,539
Common Stock
Common Stock, Shares, Outstanding [Roll Forward]
Common stock, shares outstanding, beginning of period (shares)	53,689,000	54,518,000	54,383,000
Exercise of stock appreciation rights (shares)	77,000	62,000	147,000
Director compensation arrangements, net (shares)	4,000	6,000	7,000
Restricted/performance shares activity, net of forfeitures (shares)	127,000	86,000	101,000
Acquisition/surrender of shares (shares)	(167,000)	(983,000)	(120,000)
Common stock, shares outstanding, end of period (shares)	53,730,000	53,689,000	54,518,000