Note 6. Equity Incentive Plan and Stock-Based Compensation (Details) - Stock Option Activities (USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 30, 2012
Stock Option Activities [Abstract]    
Number of Shares 6,795,177 6,641,892
Weighted Average Exercise Price (in Dollars per share) $ 13.04 $ 13.06
Weighted Average Remaining Contractual Life (in Years) 4 years 306 days 5 years 124 days
Aggregate Intrinsic Value (in Dollars) $ 10,030 $ 15,228
Total vested and exercisable as of June 30, 2013 4,436,879  
Total vested and exercisable as of June 30, 2013 (in Dollars per share) $ 13.48  
Total vested and exercisable as of June 30, 2013 4 years 306 days  
Total vested and exercisable as of June 30, 2013 (in Dollars) 6,221  
Granted 530,000  
Granted (in Dollars per share) $ 11.65  
Cancelled/Forfeited (221,456)  
Cancelled/Forfeited (in Dollars per share) $ 12.77  
Exercised (155,259)  
Exercised (in Dollars per share) $ 9.63  
Exercised (in Dollars) $ 450