Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Basic earnings per common share:
Net income attributable to the Company	$ 22,541	$ 10,780	$ 48,723	$ 33,016
Change in noncontrolling interest redemption value	279	73	499	143
Net income attributable to participating securities	(91)	(50)	(201)	(150)
Net income attributable to common shareholders	$ 22,729	$ 10,803	$ 49,021	$ 33,009
Weighted average common shares outstanding	37,203	39,692	37,567	39,764
Basic earnings per common share	$ 0.61	$ 0.27	$ 1.30	$ 0.83
Diluted earnings per common share:
Net income attributable to common shareholders	$ 22,729	$ 10,803	$ 49,021	$ 33,009
Weighted average common shares outstanding	37,203	39,692	37,567	39,764
Dilutive effect of outstanding equity awards	304	525	337	604
Diluted weighted average common shares outstanding	37,507	40,217	37,904	40,368
Diluted earnings per common share	$ 0.61	$ 0.27	$ 1.29	$ 0.82
Weighted average antidilutive awards excluded from computation of earnings per share	689	292	566	198