Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	$ 599,094		$ 661,910
Less accumulated depreciation and amortization	438,199		477,565
Property, plant and equipment, net	160,895		184,345
Depreciation	50,151		51,447		50,549
Asset Impairment Charges	72,017		15,783		2,962
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	7,008		7,652
Buildings and building equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	63,225		67,533
Machinery, tools, and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	93,403		118,663
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	26,858	[1]	27,026	[1]
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	79,719		83,822
Computer software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	154,622		178,590
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	71,492		79,346
Tooling [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	85,560		82,539
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment at cost	17,207		16,739
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	15
Maximum [Member] | Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	15
Maximum [Member] | Machinery, tools, and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	12
Maximum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	10
Maximum [Member] | Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	5
Maximum [Member] | Computer software [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	10
Maximum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	8
Maximum [Member] | Tooling [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	5
Minimum [Member] | Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	0
Minimum [Member] | Machinery, tools, and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	5
Minimum [Member] | Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	3
Minimum [Member] | Computer software [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	5
Minimum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	5
Minimum [Member] | Tooling [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life, Minimum (years)	3
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ 2,017		$ 7,835

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