Restatement - Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (Loss)	$ 1,782	$ 6,619	$ (191)	$ 11,778
Other Comprehensive Loss
Amortization of actuarial loss and prior service costs, net of tax benefit of approximately $48 and $84 for the three months and six months ended June 28, 2014	(153)	(57)	(278)	(126)
Other Comprehensive Loss	(153)	(57)	(278)	(126)
Comprehensive Income	$ 1,935	6,676	$ 87	11,904
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (Loss)		6,472		11,101
Other Comprehensive Loss
Amortization of actuarial loss and prior service costs, net of tax benefit of approximately $48 and $84 for the three months and six months ended June 28, 2014		(57)		(126)
Other Comprehensive Loss		(57)		(126)
Comprehensive Income		6,529		11,227
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Income (Loss)		147		677
Other Comprehensive Loss
Amortization of actuarial loss and prior service costs, net of tax benefit of approximately $48 and $84 for the three months and six months ended June 28, 2014		0		0
Other Comprehensive Loss		0		0
Comprehensive Income		$ 147		$ 677