Significant Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Current:
Federal	$ 34,255	$ 35,390	$ 42,391
State	5,225	6,108	7,403
Total current	39,480	41,498	49,794
Deferred:
Federal	(22,489)	7,666	6,279
State	102	608	523
Total deferred	(22,387)	8,274	6,802
Total provision for income taxes	$ 17,093	$ 49,772	$ 56,596