Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 31, 2012
Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance	$ 81,667		$ 81,667		$ 87,239
Net loss	(3,529)	36,860	(5,623)	35,297
Stock repurchased			358
Stock-based compensation			450	388
Exercise of stock options			25
Adjustment to net periodic benefit cost	34	37	67	75
Common Stock [Member]
Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance	283		283		284
Net loss
Stock repurchased			(1)
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost
Additional Paid-in Capital [Member]
Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance	15,137		15,137		15,018
Net loss
Stock repurchased			(356)
Stock-based compensation			450
Exercise of stock options			25
Adjustment to net periodic benefit cost
Retained Earnings [Member]
Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance	66,798		66,798		72,421
Net loss			(5,623)
Stock repurchased
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity (Details) - A reconciliation of the activity in Stockholders` Equity accounts [Line Items]
Balance	(551)		(551)		(484)
Net loss
Stock repurchased
Stock-based compensation
Exercise of stock options
Adjustment to net periodic benefit cost			$ (67)