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v2.4.1.9

Geographic And Service Group Information (Revenue By Service Group) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 02, 2015 | Sep. 26, 2014 | Jun. 27, 2014 | Mar. 28, 2014 | Dec. 27, 2013 | Sep. 27, 2013 | Jun. 28, 2013 | Mar. 29, 2013 | Jan. 02, 2015 | Dec. 27, 2013 | Dec. 28, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 60,343 us-gaap_Revenues | $ 60,437 us-gaap_Revenues | $ 61,052 us-gaap_Revenues | $ 54,905 us-gaap_Revenues | $ 52,604 us-gaap_Revenues | $ 57,916 us-gaap_Revenues | $ 58,961 us-gaap_Revenues | $ 54,349 us-gaap_Revenues | $ 236,737 us-gaap_Revenues | $ 223,830 us-gaap_Revenues | $ 222,736 us-gaap_Revenues
The Hackett Group [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | 196,145 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_HackettGroupMember | 184,112 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_HackettGroupMember | 187,787 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_HackettGroupMember
ERP Solutions [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  | $ 40,592 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_ERPSolutionsMember | $ 39,718 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_ERPSolutionsMember | $ 34,949 us-gaap_Revenues / us-gaap_ProductOrServiceAxis = hckt_ERPSolutionsMember

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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