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Summary of Company's Balance Sheet Related Pension and Other Postretirement Benefit Plan (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 25, 2015
Jan. 03, 2015
Post-Retirement Plans [Abstract]    
Current benefit liability $ 1,089us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities $ 1,089us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
Noncurrent benefit liability 87,685us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent 93,589us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Accumulated other comprehensive loss, net of tax $ 85,869us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax $ 86,612us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax