Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	$ 612,894		$ 599,094
Less accumulated depreciation and amortization	443,388		438,199
Total property plant and equipment, net	169,506		160,895
Depreciation	48,202		50,151		51,447
Impairment of assets	2,123		72,017		15,783
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	7,044		7,008
Buildings and building equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	59,754		63,225
Estimated useful life, minimum (years)	P15Y
Machinery, tools and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	86,513		93,403
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	24,871	[1]	26,858	[1]
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	57,859		79,719
Computer software
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	162,690		154,622
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	65,409		71,492
Tooling
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	94,571		85,560
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	54,183		17,207
Maximum | Land and land improvements
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P15Y
Maximum | Machinery, tools and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P12Y
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P10Y
Maximum | Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P5Y
Maximum | Computer software
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P10Y
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P8Y
Maximum | Tooling
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P5Y
Minimum | Land and land improvements
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P0Y
Minimum | Machinery, tools and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P5Y
Minimum | Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P3Y
Minimum | Computer software
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P5Y
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P5Y
Minimum | Tooling
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (years)	P3Y
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Impairment of assets			$ 2,017		$ 7,835

[1] The estimated useful life for leasehold improvements is the lesser of 10 years or the term of the lease.