Derivative Financial Instruments (Narrative) (Details) - Jul. 04, 2015 - Diesel Fuel Swap [Member] $ in Millions	USD ($) counterparty
Derivatives, Fair Value [Line Items]
Number of counterparties	2
Expected hedging percentage of diesel fuel requirements for next twelve months	50.00%
Deferred net losses, net of tax expected to be reclassified to current earnings over the next twelve months \| $	$ 0.3

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=35736893&loc=d3e80748-113994

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