Periodic Financial Data (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
Quarterly Financial Data [Abstract]
Total revenues	$ 484,696	$ 488,622	$ 502,027	$ 446,568	$ 450,463	$ 453,852	$ 741,183	$ 642,950	$ 2,216,528	$ 1,993,833	$ 1,802,223
Operating margin	141,954	152,672	157,066	133,514	134,645	137,042	231,439	189,565	683,131	594,766	548,974
Income before provision for income taxes	60,628	73,278	74,182	56,989	61,539	63,880	98,127	76,215	306,215	258,623	225,099
Net income	$ 37,832	$ 45,909	$ 46,289	$ 35,618	$ 38,462	$ 40,474	$ 62,759	$ 48,033	$ 192,789	$ 162,587	$ 142,985
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
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
Common stock dividends declared per share	$ 0.31	$ 0.31	$ 0.31	$ 0.25	$ 0.25	$ 0.25	$ 0.31	$ 0.25	$ 1.24	$ 1.00	$ 0.80