Stockholders' Equity (Detail) - A reconciliation of the activity in Stockholders` Equity accounts (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Balance			$ 57,040
Net income	(1,904)	(1,691)	33,392	(6,215)
Stock-based compensation			589	342
Balance	90,912		90,912
Common Stock [Member]
Balance			287
Net income
Stock-based compensation
Adjustment to net periodic benefit cost
Balance	287		287
Additional Paid-in Capital [Member]
Balance			14,898
Net income
Stock-based compensation			589
Adjustment to net periodic benefit cost
Balance	15,487		15,487
Retained Earnings [Member]
Balance			42,037
Net income			33,392
Stock-based compensation
Adjustment to net periodic benefit cost
Balance	75,429		75,429
Accumulated Other Comprehensive Income (Loss) [Member]
Balance			(182)
Net income
Stock-based compensation
Adjustment to net periodic benefit cost			(109)
Balance	$ (291)		$ (291)