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Fair Value of Financial Instruments - Deferred Compensation Plan and Acquisition Related Contingent Consideration (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2014
Dec. 29, 2013
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]    
Acquisition related contingent consideration $ 46,850us-gaap_BusinessCombinationContingentConsiderationLiability $ 0us-gaap_BusinessCombinationContingentConsiderationLiability
Level 1 [Member]    
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]    
Deferred compensation plan assets 18,580us-gaap_DeferredCompensationPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
17,098us-gaap_DeferredCompensationPlanAssets
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Deferred compensation plan liabilities 18,580us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
17,098us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Level 2 [Member]    
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]    
Deferred compensation plan assets      
Deferred compensation plan liabilities     
Acquisition related contingent consideration     
Level 3 [Member]    
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]    
Acquisition related contingent consideration $ 46,850us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member