Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance, December 31, 2012			$ 87,239
Net loss	(2,470)	(1,904)	(8,093)	33,392
Stock repurchased			(358)
Stock-based compensation			661	589
Exercise of stock options			38
Adjustment to net periodic benefit cost	34	34	101	109
Balance, September 28, 2013	79,387		79,387
Common Stock [Member]
Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance, December 31, 2012			284
Net loss
Stock repurchased			(2)
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost
Balance, September 28, 2013	282		282
Additional Paid-in Capital [Member]
Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance, December 31, 2012			15,018
Net loss
Stock repurchased			(356)
Stock-based compensation			661
Exercise of stock options			38
Adjustment to net periodic benefit cost
Balance, September 28, 2013	15,361		15,361
Retained Earnings [Member]
Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance, December 31, 2012			72,421
Net loss			(8,093)
Stock repurchased
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost
Balance, September 28, 2013	64,328		64,328
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity (Details) - Reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance, December 31, 2012			(484)
Net loss
Stock repurchased
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost			(100)
Balance, September 28, 2013	$ (584)		$ (584)