Business Segment and Foreign Operations - Foreign Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	$ 170,986	$ 147,551	$ 321,644	$ 280,256
United States [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	90,872	62,349	174,810	117,108
Asia (excluding PRC) [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	20,618	30,645	42,191	61,665
People's Republic of China [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	23,153	21,368	40,079	37,204
Europe [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	18,544	16,112	34,327	31,134
Latin America [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	11,686	10,396	19,241	20,918
All Other Countries [Member]
Schedule of Revenues from Geographical Segments [Line Items]
Total net sales	$ 6,113	$ 6,681	$ 10,996	$ 12,227