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Business Acquisitions (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jun. 30, 2018	Dec. 30, 2017
Business Acquisitions
Goodwill		$ 88,656	$ 89,000
C1 Consulting LLC
Business Acquisitions
Maximum period for additional purchase consideration to be paid	4 years
Goodwill	$ 13,000
Amortizable intangible assets	8,500
Contingent consideration liability	$ 2,400

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- Definition

Maximum period for additional purchase consideration to be paid following the transaction in the form of an earnout.

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 30
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The amount of identifiable intangible assets recognized as of the acquisition date.

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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.

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