Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 09, 2012	Sep. 11, 2011	Sep. 09, 2012	Sep. 11, 2011
Earnings Per Share [Line Items]
Net income available to common stockholders - basic and diluted	$ 25,976	$ 22,091	$ 74,814	$ 74,450
Basic weighted average number of shares	56,082,516	59,172,788	56,588,382	59,670,550
Earnings per share - basic	$ 0.46	$ 0.37	$ 1.32	$ 1.25
Diluted weighted average number of shares	58,519,573	61,833,635	59,240,919	62,577,561
Earnings per share - diluted	$ 0.44	$ 0.36	$ 1.26	$ 1.19