Earnings (Loss) per Share (Detail) - Computation of basic and diluted earnings (loss) per share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 29, 2012	Jun. 16, 2012	Mar. 24, 2012	Dec. 31, 2011	Jun. 18, 2011	Mar. 26, 2011	Oct. 06, 2012	Oct. 08, 2011	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Numerator:
Net earnings (loss) (in Dollars)	$ (28,962)	$ (84,968)	$ 5,454	$ 8,180	$ 10,051	$ 7,481	$ 14,604	$ 10,093	$ (93,872)	$ 35,805	$ 50,941
Denominator:
Denominator for basic earnings per share (weighted-average shares)									12,970	12,808	12,819
Effect of dilutive options and awards										260	367
Denominator for diluted earnings per share (adjusted weighted-average shares)									12,970	13,068	13,186
Basic earnings (loss) per share (in Dollars per share)	$ (2.23)	$ (6.55)	$ 0.42	$ 0.63	$ 0.79	$ 0.59	$ 1.13	$ 0.78	$ (7.24)	$ 2.80	$ 3.97
Diluted earnings (loss) per share (in Dollars per share)	$ (2.23)	$ (6.55)	$ 0.42	$ 0.62	$ 0.77	$ 0.57	$ 1.12	$ 0.77	$ (7.24)	$ 2.74	$ 3.86