Common Stock and Stock-Based Awards (Summary Of Stock Options) (Details) - Employee Stock Option - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Options, Outstanding, Beginning balance	57	132	188
Number of Options, Exercised	(17)	(53)	(54)
Number of Options, Forfeited or expired	(3)	(22)	(2)
Number of Options, Outstanding, Ending balance	37	57	132
Weighted-Average Exercise Price, Outstanding, Beginning balance	$ 21.85	$ 20.06	$ 19.98
Weighted-Average Exercise Price, Exercised	19.52	17.16	19.77
Weighted-Average Exercise Price, Forfeited or expired	20.11	22.36	20.16
Weighted-Average Exercise Price, Outstanding, Ending balance	$ 23.07	$ 21.85	$ 20.06
Weighted-Average Remaining Contractual Term (Years), Outstanding	8 months 12 days
Aggregate Intrinsic Value, Outstanding	$ 169