Common Stock and Stock-Based Awards Plans (Schedule Of Unrecognized Compensation Cost And Remaining Weighted-Average Amortization Period) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 25,713
Remaining weighted-average amortization period	2 years 8 months 12 days
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 5,997	[1]
Remaining weighted-average amortization period	1 year 10 months 24 days	[1]

[1] Based on the probable achievement of the performance goals identified in each award.