Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - Reclassification out of Accumulated Other Comprehensive Income - Post Retirement Obligations $ in Thousands	6 Months Ended
	Jul. 04, 2015 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Service cost	$ (104)
Reclassifications net of tax	$ (104)