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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 28, 2014
Dec. 27, 2013
Consolidated Balance Sheets [Abstract]    
Accounts receivable and unbilled revenue, allowance $ 1,507 $ 1,674
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 1,250,000 1,250,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 125,000,000 125,000,000
Common stock, shares issued 53,094,950 52,143,103
Treasury stock, at cost, shares 22,905,569 22,189,409