Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Summary of Option Activity (Detail) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Shares
Outstanding at January 1 (in shares)	1,820,000	1,768,375	1,601,250
Granted (in shares)	0	253,500	248,000
Exercised (in shares)	(10,625)	0	(26,875)
Expired/Forfeited (in shares)	(626,375)	(201,875)	(54,000)
Outstanding December 31 (in shares)	1,183,000	1,820,000	1,768,375
Exercisable (in shares)	943,250	1,370,125	1,237,250
Weighted Average Exercise Price
Outstanding at January 1 (in usd per share)	$ 49.41	$ 51.28	$ 51.73
Granted (in usd per share)	0	33.79	47.90
Exercised (in usd per share)	33.79	0	44.44
Expired/Forfeited (in usd per share)	51.29	46.20	52.60
Outstanding December 31 (in usd per share)	48.55	49.41	51.28
Exercisable (in usd per share)	$ 50.64	$ 52.02	$ 52.76
Intrinsic value of options exercised	$ 58,200
Closing price (in usd per share)	$ 38.80
Weighted average remaining life of options exercisable	4 years 3 months 18 days
Weighted average remaining life of options outstanding	4 years 10 months 24 days

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.