Schedule Of Computation Of Weighted Average Number Of Shares Issued And Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]
Net earnings (loss)	$ 7,203	$ 704	$ (272,409)	$ (9,170)
Weighted-average shares outstanding - basic	60,451	59,796	60,243	59,959
Dilutive effect of nonvested restricted shares and stock options	128	101	0	0
Weighted-average shares outstanding - diluted	60,579	59,897	60,243	59,959
Basic earnings (loss) per share	$ 0.12	$ 0.01	$ (4.52)	$ (0.15)
Diluted earnings (loss) per share	$ 0.12	$ 0.01	$ (4.52)	$ (0.15)