Earnings per Share - Additional Information (Details) - shares	3 Months Ended	6 Months Ended
Jul. 02, 2017	Jul. 02, 2017	Jul. 03, 2016
Stock Option Awards
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share		985,750	450,750
Black Knight Advisory Services, LLC \| Class B Units
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Dilutive shares included in computation of earnings per share	210,309	105,155	10,603

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration