Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding beginning balance (in shares)	1,652,505	1,033,838
Options granted (in shares)		652,000
Options exercised (in shares)	(56,832)	(20,000)
Options forfeited (in shares)	(23,000)
Options expired (in shares)	(74,498)
Options outstanding, ending balance (in shares)	2,216,175	1,665,838
Stock Options Weighted Average Exercise Price
Options outstanding, weighted average exercise price, beginning balance (in US dollars per share)	$ 78.10	$ 83.54
Options granted, weighted average exercise price (in US dollars per share)	53.62	69.20
Options exercised, weighted average exercise price (in US dollars per share)	53.41	60.52
Options forfeited, weighted average exercise price (in US dollars per share)	62.33
Options expired, weighted average exercise price (in US dollars per share)	77.93
Options outstanding, weighted average exercise price, ending balance (in US dollars per share)	$ 70.97	$ 78.20
Stock Options Additional Disclosures
Options exercisable (in shares)	1,695,155	1,183,324
Options exercisable, weighted average exercise price (in US dollars per share)	$ 74.73	$ 79.25
Options outstanding, weighted average remaining contractual life (in years)	3 years 21 days
Options exercisable, weighted average remaining contractual life (in years)	2 years 9 months
2019 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options granted (in shares)	718,000