Share-Based Compensation (RSU Activity During the Year) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Outstanding and unvested, beginning balance, in shares	371,030	489,522	604,340
RSUs, granted, in shares	139,730	153,806	213,142
RSUs, vested, in shares	(202,172)	(266,041)	(338,952)
RSUs, cancelled, in shares	(13,935)	(6,257)	(11,356)
Outstanding and unvested, ending balance, in shares	294,653	371,030	489,522
Weighted average grant date fair value, beginning of Period, in dollars per share	$ 118.88	$ 87.75	$ 93.56
Weighted average grant date fair value, granted, in dollars per share	165.07	154.33	104.76
Weighted average grant date fair value, vested, in dollars per share	107.29	82.18	86.62
Weighted average grant date fair value, cancelled, in dollars per share	136.89	115.11	84.38
Weighted average grant date fair value, end of Period, in dollars per share	$ 147.88	$ 118.88	$ 87.75
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Spinoff Adjustment			22,348