Financial Statement Details - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Additional Financial Information [Line Items]
Increase (decrease) in depreciation expense	$ 4.2	$ 13.7
Change in estimates effect on increase in net income	3.8	11.9
Change in estimates effect on increase in net income per share	$ 0.03	$ 0.09
Molds And Tooling Equipment
Additional Financial Information [Line Items]
Increase (decrease) in depreciation expense		$ 0.7
Other long term assets, estimated useful life		3 years
Molds And Tooling Equipment | Minimum
Additional Financial Information [Line Items]
Other long term assets, estimated useful life		1 year
Molds And Tooling Equipment | Maximum
Additional Financial Information [Line Items]
Other long term assets, estimated useful life		5 years
Machinery and equipment at wafer fabrication facilities
Additional Financial Information [Line Items]
Estimated useful life		10 years
Previous Policy | Machinery and Equipment
Additional Financial Information [Line Items]
Estimated useful life		8 years