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Restructuring and Impairment Charges (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items] |
Goodwill impairment | $ 21,521
Maximum [Member] | Roanoke, Virginia Manufacturing Facility [Member] |
Restructuring Cost and Reserve [Line Items] |
Cost estimate for implementing program | 4,500
Minimum [Member] | Roanoke, Virginia Manufacturing Facility [Member] |
Restructuring Cost and Reserve [Line Items] |
Cost estimate for implementing program | $ 3,500

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