Capital Stock - Schedule of Common Stock Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Common Stock
Common Stock Activity [Roll Forward]
Beginning balance	$ 344,328	$ 330,077	$ 343,842	$ 329,953
Stock compensation expense	7,809	5,370	11,621	7,999
Ending balance	352,597	336,175	352,597	336,175
Treasury Cost
Common Stock Activity [Roll Forward]
Beginning balance	(540,194)	(412,212)	(483,248)	(396,604)
Stock compensation expense	0	0	0	0
Ending balance	(565,708)	(442,123)	(565,708)	(442,123)
Restricted and performance stock awards | Common Stock
Common Stock Activity [Roll Forward]
Restricted and performance stock awards	435	365	3,773	3,007
Restricted and performance stock awards | Treasury Cost
Common Stock Activity [Roll Forward]
Restricted and performance stock awards	435	365	3,773	3,007
Stock options exercised | Common Stock
Common Stock Activity [Roll Forward]
Stock compensation expense	0	158	12	295
Stock options exercised | Treasury Cost
Common Stock Activity [Roll Forward]
Stock compensation expense	1	109	11	202
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	(455)	(534)	(10,302)	(8,880)
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	25,679	29,998	76,126	39,995
Employee stock purchase program | Common Stock
Common Stock Activity [Roll Forward]
Stock compensation expense	895	935	895	935
Employee stock purchase program | Treasury Cost
Common Stock Activity [Roll Forward]
Stock compensation expense	$ 184	$ 147	$ 184	$ 147