Effect of Increase in Cost of Insurance and Claims (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Change in Accounting Estimate [Line Items]
Operating income	$ 122,248	$ 32,181	$ 225,516	$ 86,186
Net income	$ 92,294	$ 24,254	$ 169,534	$ 65,149
Diluted earnings per share	$ 2.40	$ 0.63	$ 4.41	$ 1.68
Development of Prior Year Self Insured Claims Estimates
Change in Accounting Estimate [Line Items]
Operating income	$ 1,272	$ 2,816	$ 980	$ 5,039
Net income	$ 962	$ 2,135	$ 741	$ 3,820
Diluted earnings per share	$ 0.03	$ 0.06	$ 0.02	$ 0.10