Business Segment and Foreign Operations - Net Sales to External Customers by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Revenues from Geographical Segments [Line Items]
Net sales	$ 160,542	$ 169,185	$ 170,986	$ 150,658	$ 162,110	$ 160,467	$ 147,551	$ 132,705	$ 651,371	$ 602,833	$ 562,329
United States
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									338,338	287,678	201,579
Asia (excluding the PRC)
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									89,527	109,960	129,614
People's Republic of China (PRC)
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									77,224	74,475	98,057
Europe
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									74,113	65,579	70,663
Latin America
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									47,286	38,985	38,912
Other
Schedule of Revenues from Geographical Segments [Line Items]
Net sales									$ 24,883	$ 26,156	$ 23,504