Net Income (Loss) Per Share - Schedule of Reconciliation of Basic and Diluted Share Counts (Details) - shares	3 Months Ended	9 Months Ended
Sep. 26, 2018	Sep. 27, 2017	Sep. 26, 2018	Sep. 27, 2017
Earnings Per Share [Abstract]
Weighted-average shares outstanding—basic (shares)	38,602,658	38,462,100	38,516,792	38,449,453
Dilutive effect of stock options and restricted shares (shares)	602,432	0	585,338	651,761
Weighted-average shares outstanding— diluted (shares)	39,205,090	38,462,100	39,102,130	39,101,214

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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