Share-Based Compensation (Information Concerning Currently Outstanding and Exercisable Options) (Details)	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Number of options outstanding, in shares | shares	757,780
Weighted average remaining life, Outstanding, in years	6 years 7 months 6 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 93.76
Number of options exercisable, in shares | shares	439,997
Weighted average remaining life, Exercisable, in years	5 years 4 months 24 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 80.83
Stock Options
Weighted average remaining life, Exercisable, in years	5 years 4 months 24 days
0.01 - 25.00
Number of options outstanding, in shares | shares	1,275
Weighted average remaining life, Outstanding, in years	2 months 12 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 24.95
Number of options exercisable, in shares | shares	1,275
Weighted average remaining life, Exercisable, in years	2 months 12 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 24.95
25.01 - 50.00
Number of options outstanding, in shares | shares	14,242
Weighted average remaining life, Outstanding, in years	1 year 1 month 6 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 33.77
Number of options exercisable, in shares | shares	14,242
Weighted average remaining life, Exercisable, in years	1 year 1 month 6 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 33.77
50.01 - 75.00
Number of options outstanding, in shares | shares	179,313
Weighted average remaining life, Outstanding, in years	4 years 2 months 12 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 64.62
Number of options exercisable, in shares | shares	179,313
Weighted average remaining life, Exercisable, in years	4 years 2 months 12 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 64.62
75.01 - 100.00
Number of options outstanding, in shares | shares	253,153
Weighted average remaining life, Outstanding, in years	6 years 4 months 24 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 87.61
Number of options exercisable, in shares | shares	196,802
Weighted average remaining life, Exercisable, in years	6 years 3 months 18 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 87.47
100.01 - 125.00
Number of options outstanding, in shares | shares	162,848
Weighted average remaining life, Outstanding, in years	9 years 1 month 6 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 109.12
Number of options exercisable, in shares | shares	130
Weighted average remaining life, Exercisable, in years	8 years 4 months 24 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 100.68
125.01 - 150.00
Number of options outstanding, in shares | shares	146,949
Weighted average remaining life, Outstanding, in years	7 years 9 months 18 days
Weighted average exercise price, options outstanding, in dollars per share | $ / shares	$ 129.33
Number of options exercisable, in shares | shares	48,235
Weighted average remaining life, Exercisable, in years	7 years 8 months 12 days
Weighted average exercise price, option exercisable, in dollars per share | $ / shares	$ 129.33