Restructuring and Impairment Charges (Schedule Of Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Accrued	$ 163	$ 1,847
Cash Charges	0	6,437
Non-cash charges	0	93
Cash payments	(163)	(8,041)
Accrued	0	163
Impairment And Loss On Disposal Of Machinery And Equipment [Member]
Restructuring Cost and Reserve [Line Items]
Accrued	0	0
Cash Charges	0	0
Non-cash charges	0	269
Cash payments	0	0
Accrued	0	0
Employee Severance And Retention [Member]
Restructuring Cost and Reserve [Line Items]
Accrued	163	1,596
Cash Charges	0	0
Non-cash charges	0	(80)
Cash payments	(163)	(1,353)
Accrued	0	163
Other Charges Related To Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Accrued	0	251
Cash Charges	0	6,437
Non-cash charges	0	(96)
Cash payments	0	(6,688)
Accrued	$ 0	$ 0