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Goodwill - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Dec. 29, 2014
Unit
Goodwill [Line Items]        
Reporting unit percentage of fair value less than carrying amount 50.00%us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount      
Weightage for DCF valuation and market assessment to estimate fair value of operating unit   50.00%ck0001571371_WeightedForDiscountedCashFlowValuationAndMarketAssessmentToEstimateFairValueOfOperatingUnit    
Goodwill impairment   $ 68,202,000us-gaap_GoodwillImpairmentLoss    
Impairment charges recognized $ 0us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges  
Subsequent Event [Member]        
Goodwill [Line Items]        
Total number of reporting units       11ck0001571371_NumberOfReportingUnitsBeingSubjectedToGoodwillImpairmentTest
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Goodwill [Member]        
Goodwill [Line Items]        
Discount rate   11.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_GoodwillMember