Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment, cost	$ 237,214	$ 223,048
Accumulated depreciation	(157,510)	(148,728)
Net property and equipment	79,704	74,320	[1]
Machinery and Equipment, Gross	99,259	96,909
Furniture and Fixtures, Gross	3,919	3,638
Construction in Progress, Gross	10,918	6,003
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, cost	60,107	56,716
Molds [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, cost	37,452	36,436
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, cost	$ 25,559	$ 23,346

[1] December 31, 2015 balances were derived from audited consolidated financial statements.