Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) (Reclassification out of Accumulated Other Comprehensive Income, Post Retirement Obligations, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014
Reclassification out of Accumulated Other Comprehensive Income | Post Retirement Obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Service cost	$ (2)
Reclassifications net of tax	$ (2)