Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty liability balance, beginning of the period	$ 3,438	$ 3,025
Product warranty accruals	3,209	2,205
Utilization of accrual	(3,529)	(2,345)
Warranty liability balance, end of the period	3,118	3,702
CCPU Beginning Balance [Member]
Movement in Standard Product Warranty Accrual [Roll Forward]
Product warranty accruals	$ 0	$ 817
Minimum [Member]
Product Warranty Liability [Line Items]
Standard Product Warranty, Term	12 months
Contract Manufacturers Standard Product Warranty, Term	12 months
Maximum [Member]
Product Warranty Liability [Line Items]
Standard Product Warranty, Term	24 months
Contract Manufacturers Standard Product Warranty, Term	15 months