Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Sep. 11, 2016	Jun. 19, 2016	Mar. 27, 2016	Sep. 06, 2015	Jun. 14, 2015	Mar. 22, 2015	Jan. 01, 2017	Jan. 03, 2016	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders - basic and diluted	$ 47,232	$ 49,261	$ 45,451	$ 37,832	$ 45,909	$ 46,289	$ 72,734	$ 62,759	$ 214,678	$ 192,789	$ 162,587
Weighted average number of common shares									48,647,167	53,828,609	54,918,471
Earnings per common share - basic	$ 0.98	$ 1.00	$ 0.91	$ 0.69	$ 0.84	$ 0.84	$ 1.52	$ 1.21	$ 4.41	$ 3.58	$ 2.96
Diluted weighted average number of common shares									49,923,859	55,532,955	56,931,226
Earnings per common share - diluted	$ 0.96	$ 0.98	$ 0.89	$ 0.67	$ 0.81	$ 0.81	$ 1.48	$ 1.18	$ 4.30	$ 3.47	$ 2.86