Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 190,365	$ 203,386	$ 222,241	$ 218,297	$ 210,814	$ 208,853	$ 220,602	$ 225,930	$ 834,289	$ 866,199	$ 824,444
Long-term Assets:
Total long-term assets	270,943				239,342				270,943	239,342
North America [Member]
Segment Reporting Information [Line Items]
Net sales									457,633	480,511	471,770
Long-term Assets:
Total long-term assets	87,430				86,763				87,430	86,763
South America [Member]
Segment Reporting Information [Line Items]
Net sales									67,534	80,175	94,533
Long-term Assets:
Total long-term assets	52,518				45,408				52,518	45,408
Europe and Other [Member]
Segment Reporting Information [Line Items]
Net sales									309,122	305,513	$ 258,141
Long-term Assets:
Total long-term assets	$ 130,995				$ 107,171				$ 130,995	$ 107,171