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Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Narrative (Details) - USD ($)			3 Months Ended				6 Months Ended
	Jun. 30, 2023	May 12, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]
Deferred compensation (in shares)	118,987						5,028
Shares due to exercise of employee stock options and issuance of directors' deferred stock			3,104,000	699	19,618,000	8,007
Share-based payment arrangement, expense							$ 700,000
Future expense	$ 2,800,000		$ 2,800,000				2,800,000
Exercised							$ 0	$ 237,724
Closing share price (in usd per share)	$ 36.83		$ 36.83				$ 36.83
Share-based compensation arrangement by share-based payment award, options, grants since inception (in shares)	1,700,000		1,700,000				1,700,000
Weighted average remaining contractual life of the Company's outstanding options							6 years
Weighted average remaining contractual life of the Company's exercisable options							4 years 7 months 6 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							6,865
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

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