Calculation of Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Basic earnings per common share:
Net income attributable to the Company	$ 19,311	$ 19,306
Increase in noncontrolling interest redemption value	(8)
Net income attributable to participating securities	(137)
Net income attributable to common shareholders	19,166	19,306
Weighted average common shares outstanding	41,778	44,512
Basic earnings per common share	$ 0.46	$ 0.43
Diluted earnings per common share:
Net income attributable to common shareholders	$ 19,166	$ 19,306
Weighted average common shares outstanding	41,778	44,512
Dilutive effect of outstanding equity awards	918	1,100
Diluted weighted average common shares outstanding	42,696	45,612
Diluted earnings per common share	$ 0.45	$ 0.42
Antidilutive awards excluded from computation of earnings per share	102	0