Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 26, 2017	Mar. 27, 2016
Basic earnings per common share:
Net income attributable to the Company	$ 28,428	$ 26,182
Change in noncontrolling interest redemption value	520	220
Net income attributable to participating securities	(117)	(110)
Net income attributable to common shareholders	$ 28,831	$ 26,292
Weighted average common shares outstanding	36,810	37,931
Basic earnings per common share	$ 0.78	$ 0.69
Diluted earnings per common share:
Net income attributable to common shareholders	$ 28,831	$ 26,292
Weighted average common shares outstanding	36,810	37,931
Dilutive effect of outstanding equity awards	540	366
Diluted weighted average common shares outstanding	37,350	38,297
Diluted earnings per common share	$ 0.77	$ 0.69
Weighted average antidilutive awards excluded from computation of earnings per share	117	476

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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