Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Narrative (Details) - USD ($)			3 Months Ended						9 Months Ended
	Jun. 30, 2023	May 12, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 29, 2023
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Deferred compensation (in shares)	120,396								7,797
Shares due to exercise of employee stock options and issuance of directors' deferred stock			895,000	3,104,000	699	3,191,000	19,618,000	8,007
Share-based payment arrangement, expense									$ 1,000,000
Future expense			$ 2,500,000						$ 2,500,000
Exercised (in shares)									0
Exercised									$ 0	$ 179,217
Closing share price (in usd per share)											$ 35.27
Share-based compensation arrangement by share-based payment award, options, grants since inception (in shares)											1,700,000
Weighted average remaining contractual life of the Company's outstanding options									5 years 8 months 12 days
Weighted average remaining contractual life of the Company's exercisable options									4 years 4 months 24 days
Granted (in shares)									253,500
Common Stock
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Shares due to exercise of employee stock options and issuance of directors' deferred stock									8,225
Director And Certain Officers
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Granted (in shares)		253,500
Employee Stock Option
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Expiration period									10 years
Employee Stock Option | Officers
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Award vesting period									4 years