Earnings (Loss) Per Share (Detail) - Basic and diluted earnings (loss) per share: (USD $) In Thousands, except Per Share data, unless otherwise specified	4 Months Ended		9 Months Ended
	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011
Net earnings (loss) (in Dollars)	$ 14,604	$ 10,093	$ (64,910)	$ 27,625
Net earnings (loss) per share-basic:
Weighted-average shares outstanding	12,962	12,873	12,963	12,780
Net earnings (loss) per share-basic (in Dollars per share)	$ 1.13	$ 0.78	$ (5.01)	$ 2.16
Net earnings (loss) per share-diluted:
Weighted-average shares outstanding	12,962	12,873	12,963	12,780
Shares contingently issuable	78	232		276
Weighted-average shares and potential dilutive shares outstanding	13,040	13,105	12,963	13,056
Net earnings (loss) per share-diluted (in Dollars per share)	$ 1.12	$ 0.77	$ (5.01)	$ 2.12