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Restructuring and Impairment Charges (Components of Restructuring and Impairment Charges) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Oct. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring and Impairment Charges [Abstract] |  |  |  |
Impairment and loss on right of use asset | $ 17,540 |  | $ 17,540 |
Lease termination gain |  | $ 2,445 | 15,200 | $ 2,445
Impairment and loss on disposal of machinery and equipment |  |  | 9,527 | 1,381
Employee severance and retention |  |  | 3,285 | 1,332
Goodwill impairment |  |  |  | 21,521
Other charges related to facility closure |  |  | 3,173 | 582
Total restructuring and impairment charges |  |  | $ 18,325 | $ 22,371

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- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121604053&loc=SL77918607-209975 + Details
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