Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 06, 2015	Jun. 14, 2015	Mar. 22, 2015	Sep. 07, 2014	Jun. 15, 2014	Mar. 23, 2014	Jan. 03, 2016	Dec. 28, 2014	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Earnings Per Share [Abstract]
Net income available to common stockholders - basic and diluted	$ 37,832	$ 45,909	$ 46,289	$ 35,618	$ 38,462	$ 40,474	$ 62,759	$ 48,033	$ 192,789	$ 162,587	$ 142,985
Weighted average number of common shares									53,828,609	54,918,471	55,345,554
Earnings per common share - basic	$ 0.69	$ 0.84	$ 0.84	$ 0.65	$ 0.70	$ 0.73	$ 1.21	$ 0.88	$ 3.58	$ 2.96	$ 2.58
Diluted weighted average number of common shares									55,532,955	56,931,226	57,720,998
Earnings per common share - diluted	$ 0.67	$ 0.81	$ 0.81	$ 0.63	$ 0.67	$ 0.71	$ 1.18	$ 0.85	$ 3.47	$ 2.86	$ 2.48