Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) (Reclassification out of Accumulated Other Comprehensive Income, USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications net of tax	$ 84
Post Retirement Obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Service cost	(5)
Reclassifications net of tax	(5)
Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications net of tax	89
Interest Rate Contract [Member] | Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cash flow hedges	$ 89