Cash Cash Equivalents and Investments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 02, 2011	Jul. 02, 2011	Jun. 30, 2012	Dec. 31, 2011
Carrying value of non-marketable investments
Cost method			$ 6,135	$ 6,157
Equity method			4,320	4,303
Total non-marketable investments			10,455	10,460
Net realized gains on the sale of non-marketable investments
Gains on sale of non-marketable investments	$ 108	$ 2,729

This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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+ Details