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Summary of Significant Accounting Policies - Recent Accounting Standards (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2017	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Recent Accounting Standards
Income tax benefit		$ (7,463)	$ (7,656)	$ (5,490)
ASU 2016-09
Recent Accounting Standards
Income tax benefit	$ 50
ASU 2016-09 | Scenario, Adjustment [Member]
Recent Accounting Standards
Income tax benefit	$ 50
Minimum | ASU 2014-09
Recent Accounting Standards
Increase in cumulative effect adjustment on opening balance of retained earnings		300
Maximum | ASU 2014-09
Recent Accounting Standards
Increase in cumulative effect adjustment on opening balance of retained earnings		$ 700

X

- Definition

Amount of the cumulative effect on retained earnings net of related income tax effect.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
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