Additional Cash Flow Information - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Supplemental Cash Flow Information [Abstract]
Income taxes paid	$ 50,197,000	$ 76,834,000
Interest paid	2,252,000	2,303,000
Acquired operating property by capital leases	11,869,000	41,732,000
Decrease in other liabilities	(3,849,000)	$ (10,998,000)
Purchases of common stock	112,654,000
Accrued payments on purchases of common stock
Supplemental Cash Flow Information [Abstract]
Decrease in other liabilities	$ 5,440,000