Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Income Tax Disclosure [Line Items]
Federal, Current									$ 72,025	$ 68,548	$ 74,289
State, Current									8,312	6,668	9,550
Foreign, Current									500	563	437
Total current									80,837	75,779	84,276
Federal, Deferred									(17,110)	6,104	6,524
State, Deferred									79	224	268
Total deferred									(17,031)	6,328	6,792
Income taxes	$ 4,759	$ 17,490	$ 22,689	$ 18,868	$ 23,122	$ 21,235	$ 19,891	$ 17,859	$ 63,806	$ 82,107	$ 91,068