Capital Stock - Schedule of Common Stock Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Common Stock
Common Stock Activity [Roll Forward]
Beginning balance	$ 352,597	$ 336,175	$ 343,842	$ 329,953
Stock compensation expense	7,639	3,351	19,260	11,350
Ending balance	360,106	339,256	360,106	339,256
Treasury Cost
Common Stock Activity [Roll Forward]
Beginning balance	(565,708)	(442,123)	(483,248)	(396,604)
Stock compensation expense	0	0	0	0
Ending balance	(578,486)	(442,989)	(578,486)	(442,989)
Restricted and performance stock awards | Common Stock
Common Stock Activity [Roll Forward]
Restricted and performance stock awards	130	278	3,903	3,285
Restricted and performance stock awards | Treasury Cost
Common Stock Activity [Roll Forward]
Restricted and performance stock awards	130	278	3,903	3,285
Stock options exercised | Common Stock
Common Stock Activity [Roll Forward]
Stock compensation expense	0	8	12	303
Stock options exercised | Treasury Cost
Common Stock Activity [Roll Forward]
Stock compensation expense	3	6	14	208
Treasury shares purchased for stock compensation programs | Common Stock
Common Stock Activity [Roll Forward]
Treasury shares purchased for stock compensation programs	0	0	0	0
Treasury shares purchased for stock compensation programs | Treasury Cost
Common Stock Activity [Roll Forward]
Treasury shares purchased for stock compensation programs	(228)	(1,150)	(10,530)	(10,030)
Employee stock purchase program | Common Stock
Common Stock Activity [Roll Forward]
Stock compensation expense			895	935
Employee stock purchase program | Treasury Cost
Common Stock Activity [Roll Forward]
Stock compensation expense			184	147
Share repurchase program | Common Stock
Common Stock Activity [Roll Forward]
Stock compensation expense	0	0	0	0
Share repurchase program | Treasury Cost
Common Stock Activity [Roll Forward]
Stock compensation expense	$ 12,683	$ 0	$ 88,809	$ 39,995