Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Apr. 01, 2018	Mar. 26, 2017
Basic earnings per common share:
Net income attributable to the Company	$ 16,737	$ 28,428
Change in noncontrolling interest redemption value		520
Net income attributable to participating securities	(75)	(117)
Net income attributable to common shareholders	$ 16,662	$ 28,831
Weighted average common shares outstanding	33,279	36,810
Basic earnings per common share	$ 0.50	$ 0.78
Diluted earnings per common share:
Net income attributable to common shareholders	$ 16,662	$ 28,831
Weighted average common shares outstanding	33,279	36,810
Dilutive effect of outstanding equity awards	273	540
Diluted weighted average common shares outstanding	33,552	37,350
Diluted earnings per common share	$ 0.50	$ 0.77
Weighted average antidilutive awards excluded from computation of earnings per share	790	117

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.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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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.

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Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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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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