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. 08, 2019	Jun. 16, 2019	Mar. 24, 2019	Sep. 09, 2018	Jun. 17, 2018	Mar. 25, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Total revenues	$ 820,812	$ 811,647	$ 835,963	$ 785,965	$ 779,396	$ 785,371	$ 1,150,352	$ 1,082,135	$ 3,618,774	$ 3,432,867	$ 2,787,979
INCOME FROM OPERATIONS									629,407	571,689	521,232
Income before provision for income taxes	110,245	105,979	109,143	99,248	91,197	103,670	157,270	134,563	482,637	428,678	400,153
PROVISION FOR INCOME TAXES									81,928	66,706	122,248
NET INCOME	$ 86,373	$ 92,359	$ 92,650	$ 84,095	$ 77,408	$ 88,827	$ 129,327	$ 111,642	400,709	361,972	277,905
COMPREHENSIVE INCOME									$ 401,396	$ 359,924	$ 278,985
EARNINGS PER SHARE:
Common Stock - basic	$ 2.11	$ 2.25	$ 2.27	$ 2.02	$ 1.84	$ 2.07	$ 3.20	$ 2.71	$ 9.83	$ 8.65	$ 6.05
Common Stock - diluted	$ 2.05	$ 2.19	$ 2.20	$ 1.95	$ 1.78	$ 2.00	$ 3.12	$ 2.62	$ 9.56	$ 8.35	$ 5.83
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									400,709	361,972	277,905
Income before provision for income taxes									400,709	361,972	277,905
PROVISION FOR INCOME TAXES									0	0	0
NET INCOME									400,709	361,972	277,905
COMPREHENSIVE INCOME									$ 401,396	$ 359,924	$ 278,985
EARNINGS PER SHARE:
Common Stock - basic									$ 9.83	$ 8.65	$ 6.05
Common Stock - diluted									$ 9.56	$ 8.35	$ 5.83