Significant Accounting Policies Schedule of Depreciation Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 59,919	$ 48,754	$ 41,535
Intangible asset amortization period - minimum (in years)	3
Intangible asset amortization period - maximum (in years)	15
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	7
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	7
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	7
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	5
Property, Plant and Equipment, Useful Life, Maximum (in years)	20
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life (in years)	39
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	10