v2.4.0.6
Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Jan. 02, 2010
Reconciliation of the expected tax (benefit) expense      
Expected federal income tax $ 18,739 $ 11,891 $ 1,991
Miscellaneous permanent items (13) 164 125
State taxes 543 1,545 94
Federal and state research credits (3,283) (997) (367)
Domestic production activities deduction (2,695)    
Non deductible stock compensation     259
Conversion of incentive stock options(1)     (346)
Other 59 (275) 111
Increase (decrease) in valuation allowance   (3,868) 159
Total expected tax (benefits) expenses $ 13,350 $ 8,460 $ 2,026