Derivative Financial Instruments (Narrative) (Details) (Diesel Fuel Swap [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 28, 2013
Diesel Fuel Swap [Member]
Derivatives, Fair Value [Line Items]
Expected hedging percentage of diesel fuel requirements for next twelve months	50.00%
Deferred net gains, net of tax	$ 0.03

The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

Name:	us-gaap_PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant