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Pension Plan (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 28, 2014
Dec. 27, 2014
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]    
Pension deficit contributions pre-acquisition $ 1,650us-gaap_DefinedBenefitPlanContributionsByEmployer  
Pension defiticit contribution, current   1,650us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
Pension deficit contribution, noncurrent   $ 600us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent