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Restructuring and Impairment Charges (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) item	Sep. 30, 2019 USD ($)	Oct. 08, 2020
Restructuring Cost and Reserve [Line Items]
Impairment and loss on right of use asset	$ 17,540		$ 17,540		$ 17,540
Non-cash impairment charges	8,978
Fair value of property, plant and equipment	10,383		10,383		10,383
Cash charges	3,532		3,532		3,532
Amount unpaid	$ 3,359		$ 3,359		$ 3,359
Goodwill impairment				$ 21,521		$ 21,521
Number of renewal options | item					2
Extension term	5 years		5 years		5 years
Impairment charge	$ 26,518
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	10		$ 10		$ 10
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected cost	$ 8		8		$ 8
Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Gain related to lease termination		$ 15,000
Manufacturing [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill impairment			$ 21,521
Subsequent Event [Member]
Restructuring Cost and Reserve [Line Items]
Extension term							1 month

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