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Basis of Presentation and General Information (Carrying Amount And Activity Of Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2017 | Dec. 30, 2016
Carrying amount and activity of goodwill |  |
Goodwill, Beginning Balance | $ 72,376 | $ 74,584
Additions (see Note 14) | 11,396 |
Foreign currency translation adjustment | 1,302 | (2,208)
Goodwill, Ending Balance | 85,074 | 72,376
The Hackett Group [Member] |  |
Carrying amount and activity of goodwill |  |
Goodwill, Beginning Balance | 41,242 | 43,450
Additions (see Note 14) | 1,858 |
Foreign currency translation adjustment | 1,302 | (2,208)
Goodwill, Ending Balance | 44,402 | 41,242
Hackett Technology Solutions [Member] |  |
Carrying amount and activity of goodwill |  |
Goodwill, Beginning Balance | 31,134 | 31,134
Additions (see Note 14) | 9,538 |
Goodwill, Ending Balance | $ 40,672 | $ 31,134

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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