Inventories, Net and Significant Suppliers - Significant Suppliers (Details) (Supplier Concentration Risk, Cost of goods, Samsung, USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Supplier Concentration Risk \| Cost of goods \| Samsung
Concentration Risk [Line Items]
Inventory purchases	$ 29.1
Concentration risk	10.20%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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