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Restructuring and Impairment Charges (Schedule Of Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |
Accrued | $ 1,847 | $ 1,006
Cash Charges | 6,437 | 4,169
Non-cash charges | 93 | 26,923
Cash payments | (7,985) | (1,816)
Accrued | 219 | 3,359
Impairment And Loss On Disposal Of Machinery And Equipment [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued | 0 |
Cash Charges | 0 |
Non-cash charges | 269 |
Cash payments | 0 |
Accrued | 0 |
Impairment And Loss On Right Of Use Asset [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued |  | 0
Cash Charges |  | 0
Non-cash charges |  | 17,540
Cash payments |  | 0
Accrued |  | 0
Loss On Disposal Of Machinery And Equipment [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued |  | 0
Cash Charges |  | 0
Non-cash charges |  | 9,469
Cash payments |  | 0
Accrued |  | 0
Employee Severance And Retention [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued | 1,596 | 647
Cash Charges | 0 | 3,371
Non-cash charges | (80) | 0
Cash payments | (1,297) | (659)
Accrued | 219 | 3,359
Other Charges Related To Facility Closure [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Accrued | 251 | 359
Cash Charges | 6,437 | 798
Non-cash charges | (96) | (86)
Cash payments | (6,688) | (1,157)
Accrued | $ 0 | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585 + Details
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