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Geographic And Service Group Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Dec. 28, 2012
Geographic And Service Group Information [Abstract]
Goodwill included in foreign assets	$ 15.0hckt_GoodwillIncludedInForeignAsset	$ 15.8hckt_GoodwillIncludedInForeignAsset	$ 15.6hckt_GoodwillIncludedInForeignAsset

X

- Definition

Goodwill included in foreign asset.

+ References

No definition available.

+ Details

Name:	hckt_GoodwillIncludedInForeignAsset
Namespace Prefix:	hckt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration