Property and Equipment, Net - Property and Equipment Table (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 430,460	$ 398,060
Less: Accumulated depreciation	223,730	213,030
Property and equipment, net	206,730	185,030
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,860	6,410
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	65,190	59,610
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 359,410	$ 332,040