Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details 1)

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Fair Value Measurements (Details 1) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Summary of Level 3 Investments measured at fair value on recurring basis    
Beginning balance $ 2,104 $ 4,141
Redemption at par value (2,125) (400)
Unrealized gains included in other comprehensive income 21 25
Ending balance    $ 3,766