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Restructuring and Impairment Charges (Schedule Of Restructuring Reserve Activity) (Details) - Manufacturing And Corporate And Other [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Restructuring Cost and Reserve [Line Items] |  |
Accrued | $ 1,006 |
Cash Charges | 6,578 | $ 1,892
Non-cash charges | 11,747 | 20,479
Cash payments | (5,737) | (886)
Accrued | 1,847 | 1,006
Impairment And Loss On Right Of Use Assets [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Non-cash charges | 17,540 |
Impairment Charges For Leasehold Improvements And Equipment [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Non-cash charges | 9,527 | 1,381
Lease Termination Gain [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Non-cash charges | (15,200) | (2,445)
Employee Severance And Retention [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued | 647 |
Cash Charges | 3,285 | 1,332
Cash payments | (2,336) | (685)
Accrued | 1,596 | 647
Other Charges Related To Facility Closure [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued | 359 |
Cash Charges | 3,293 | 560
Non-cash charges | (120) | 22
Cash payments | (3,401) | (201)
Accrued | $ 251 | 359
Goodwill Impairment [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Non-cash charges |  | $ 21,521

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