Significant Components of Provisions (Benefit) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Current:
Federal	$ 31,845	$ 20,989	$ 16,336
State	5,809	5,505	4,832
Total current	37,654	26,494	21,168
Deferred:
Federal	(47)	3,938	1,871
State	(166)	534	210
Total deferred	(213)	4,472	2,081
Total income tax provision	$ 37,441	$ 30,966	$ 23,249