Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017	Jul. 01, 2018	Jun. 25, 2017
Basic earnings per common share:
Net income attributable to the Company	$ 11,791	$ 23,538	$ 28,528	$ 51,966
Change in noncontrolling interest redemption value		662		1,182
Net income attributable to participating securities	(72)	(99)	(147)	(216)
Net income attributable to common shareholders	$ 11,719	$ 24,101	$ 28,381	$ 52,932
Weighted average common shares outstanding	31,941	36,732	32,610	36,771
Basic earnings per common share	$ 0.37	$ 0.66	$ 0.87	$ 1.44
Diluted earnings per common share:
Net income attributable to common shareholders	$ 11,719	$ 24,101	$ 28,381	$ 52,932
Weighted average common shares outstanding	31,941	36,732	32,610	36,771
Dilutive effect of outstanding equity awards	234	485	250	512
Diluted weighted average common shares outstanding	32,175	37,217	32,860	37,283
Diluted earnings per common share	$ 0.36	$ 0.65	$ 0.86	$ 1.42
Weighted average antidilutive awards excluded from computation of earnings per share	1,257	325	1,143	215