Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 175,764	$ 203,386	$ 458,275	$ 643,924
Long-term Assets:
Total long-term assets	262,135		262,135		$ 270,943
North America [Member]
Segment Reporting Information [Line Items]
Net sales	97,576	115,816	240,549	358,476
Long-term Assets:
Total long-term assets	93,230		93,230		87,430
South America [Member]
Segment Reporting Information [Line Items]
Net sales	12,827	16,542	34,407	50,488
Long-term Assets:
Total long-term assets	32,315		32,315		52,518
Europe and Other [Member]
Segment Reporting Information [Line Items]
Net sales	65,361	$ 71,028	183,319	$ 234,960
Long-term Assets:
Total long-term assets	$ 136,590		$ 136,590		$ 130,995