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Basis of Presentation and General Information (Reconciliation Of Basic And Diluted Weighted Average Shares)(Details)
 12 Months Ended
Jan. 02, 2015
Dec. 27, 2013
Dec. 28, 2012
Basis Of Presentation And General Information [Abstract]      
Basic weighted average common shares outstanding 28,718,263us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 30,283,298us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 31,703,544us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Unvested restricted stock units and common stock subject to vesting requirements issued to employees 1,152,974hckt_DilutiveRestrictedStockUnitsAndCommonStockSubjectToVestingRequirements 1,809,565hckt_DilutiveRestrictedStockUnitsAndCommonStockSubjectToVestingRequirements 1,765,351hckt_DilutiveRestrictedStockUnitsAndCommonStockSubjectToVestingRequirements
Common stock issuable upon the exercise of stock options 9,765hckt_DilutiveStockOptions 22,802hckt_DilutiveStockOptions 41,817hckt_DilutiveStockOptions
Dilutive weighted average common shares outstanding 29,881,002us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 32,115,665us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 33,510,712us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding