Investments (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Net realized gains on the sale of non-marketable investments
Gains on Sale of Non Marketable Investments, Including Tax Adjustment	$ 8,281	$ 4,916
Carrying value of non-marketable securities
Cost method	6,157	5,560
Equity method	4,303	3,714
Total non-marketable securities in Other assets	10,460	9,274
Write-downs related to cost method investments
Write-down of cost method investments		$ 1,500	$ 5,207

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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