Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v2.4.0.6
Fair Value of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Schedule of assets measured at fair value on recurring basis    
Available-for-sale securities $ 40,502 $ 21,832
Quoted Prices in Active Markets (Level 1) [Member]
   
Schedule of assets measured at fair value on recurring basis    
Available-for-sale securities 40,502  
Significant Other Observable Inputs (Level 2) [Member]
   
Schedule of assets measured at fair value on recurring basis    
Available-for-sale securities     
Significant Unobservable Inputs (Level 3) [Member]
   
Schedule of assets measured at fair value on recurring basis    
Available-for-sale securities