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Stockholders' Equity - Share-based Compensation, Performance Shares Award Unvested Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Schedule of Nonvested Options Activity [Line Items]
Options, Granted, Shares	826
Granted, Weighted Average Grant Date Fair Value	$ 11.95	$ 5.42	$ 3.77
Nonvested Stock Options
Schedule of Nonvested Options Activity [Line Items]
Options, Unvested at December 29, 2017	1,148
Options, Granted, Shares	826
Options, Forfeited or expired, Shares	(35)
Options, Vested, Shares	(679)
Options, Unvested at December 28, 2018	1,260	1,148
Unvested at December 29, 2017, Weighted-Average Grant-Date Fair Value	$ 4.96
Granted, Weighted Average Grant Date Fair Value	11.95
Forfeited or expired during the year, Weighted Average Grant Date Fair Value	5.73
Vested during the year, Weighted Average Grant Date Fair Value	4.90
Unvested at December 28, 2018, Weighted Average Grant Date Fair Value	$ 9.67	$ 4.96

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- Definition

Schedule of Nonvested Options Activity [Line Items]

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Gross number of share options (or share units) granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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Number of non-vested options forfeited.

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Weighted average grant-date fair value of non-vested options forfeited.

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