Business Segment and Foreign Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	$ 160,467	$ 147,780	$ 440,723	$ 423,940
United States [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	83,059	51,247	200,167	149,805
Asia (excluding PRC) [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	25,763	35,526	87,428	99,158
People's Republic of China [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	19,804	27,364	57,008	77,121
Europe [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	15,055	15,926	46,189	50,441
Latin America [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	8,848	10,378	29,766	30,016
All Other Countries [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	$ 7,938	$ 7,339	$ 20,165	$ 17,399