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Net Income Per Common Share (Basic And Diluted Weighted Average Shares) (Details)	3 Months Ended
	Apr. 03, 2015	Mar. 28, 2014
Net Income Per Common Share [Abstract]
Basic weighted average common shares outstanding	28,551,665us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	29,119,505us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees	847,951hckt_DilutiveRestrictedStockUnitsAndCommonStockSubjectToVestingRequirements	739,752hckt_DilutiveRestrictedStockUnitsAndCommonStockSubjectToVestingRequirements
Common stock issuable upon the exercise of stock options	517,700hckt_DilutiveStockOptions	9,445hckt_DilutiveStockOptions
Diluted weighted average common shares outstanding	29,917,316us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	29,868,702us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

X

- Definition

The sum of dilutive potential unvested restricted stock units and common stock subject to vesting requirements used in the calculation of the diluted per-share or per-unit computation.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

The sum of dilutive potential stock options used in the calculation of the diluted per-share or per-unit computation.

+ References

No definition available.

+ Details

Name:	hckt_DilutiveStockOptions
Namespace Prefix:	hckt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

+ Details

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Balance Type:	na
Period Type:	duration