Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 23, 2012	Jun. 24, 2012	Mar. 25, 2012	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Basic earnings per common share:
Net income attributable to the Company	$ 18,805	$ 14,276	$ 17,150	$ 19,306	$ 17,359	$ 13,031	$ 14,289	$ 16,981	$ 69,537	$ 61,660	$ 54,735
Increase in noncontrolling interest redemption value									(510)
Net income attributable to participating securities									(530)
Net income attributable to common shareholders									68,497	61,660	54,735
Weighted average common shares outstanding									43,387	46,916	50,086
Basic earnings per common share	$ 0.42	$ 0.33	$ 0.39	$ 0.43	$ 0.38	$ 0.28	$ 0.30	$ 0.35	$ 1.58	$ 1.31	$ 1.09
Earnings per common share - assuming dilution:
Net income attributable to common shareholders									$ 68,497	$ 61,660	$ 54,735
Weighted average common shares outstanding									43,387	46,916	50,086
Dilutive effect of outstanding equity awards									856	894	534
Diluted weighted average common shares outstanding									44,243	47,810	50,620
Earnings per common share - assuming dilution	$ 0.41	$ 0.32	$ 0.39	$ 0.42	$ 0.37	$ 0.27	$ 0.30	$ 0.35	$ 1.55	$ 1.29	$ 1.08