Parent Company Condensed Statements of Income and Comprehensive Income (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
Total revenues	$ 566,677	$ 547,341	$ 539,175	$ 484,696	$ 488,622	$ 502,027	$ 819,435	$ 741,183	$ 2,472,628	$ 2,216,528	$ 1,993,833
INCOME FROM OPERATIONS									454,042	405,439	345,361
INCOME BEFORE PROVISION FOR INCOME TAXES	75,814	78,692	72,842	60,628	73,278	74,182	117,310	98,127	344,658	306,215	258,623
PROVISION FOR INCOME TAXES									(129,980)	(113,426)	(96,036)
Net income	$ 47,232	$ 49,261	$ 45,451	$ 37,832	$ 45,909	$ 46,289	$ 72,734	$ 62,759	214,678	192,789	162,587
COMPREHENSIVE INCOME									$ 215,116	$ 191,902	$ 161,910
EARNINGS PER SHARE:
Common Stock - basic	$ 0.98	$ 1.00	$ 0.91	$ 0.69	$ 0.84	$ 0.84	$ 1.52	$ 1.21	$ 4.41	$ 3.58	$ 2.96
Common Stock - diluted	$ 0.96	$ 0.98	$ 0.89	$ 0.67	$ 0.81	$ 0.81	$ 1.48	$ 1.18	$ 4.30	$ 3.47	$ 2.86
Parent Company [Member]
REVENUES									$ 0	$ 0	$ 0
Total revenues									0	0	0
OPERATING EXPENSES									0	0	0
Total operating expenses									0	0	0
INCOME FROM OPERATIONS									0	0	0
Equity earnings in subsidiaries									214,678	192,789	162,587
INCOME BEFORE PROVISION FOR INCOME TAXES									214,678	192,789	162,587
PROVISION FOR INCOME TAXES									0	0	0
Net income									214,678	192,789	162,587
COMPREHENSIVE INCOME									$ 215,116	$ 191,902	$ 161,910
EARNINGS PER SHARE:
Common Stock - basic									$ 4.41	$ 3.58	$ 2.96
Common Stock - diluted									$ 4.30	$ 3.47	$ 2.86