Incentive Plans - Changes in Stock Options Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of Shares
Exercised (in shares)	0	(2,657)	(181,655)
Stock Options
Number of Shares
Outstanding at beginning of year (in shares)	0	13,000	1,319,500
Exercised (in shares)		(11,000)	(760,500)
Forfeited (in shares)		(2,000)	(546,000)
Outstanding at end of year (in shares)		0	13,000
Exercisable at end of year (in shares)			13,000	1,319,500
Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 0	$ 28.51	$ 37.77
Exercised (in USD per share)		28.51	23.29
Forfeited (in USD per share)		28.51	49.65
Outstanding at end of year (in USD per share)		$ 0	28.51
Exercisable at end of year (in USD per share)			$ 28.51	$ 34.25