Taxes on Income - Summary of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Deferred tax assets:
Employee benefits	$ 29,842	$ 29,417
Accrued workers’ compensation	3,074	4,216
Allowance for doubtful accounts	2,951	2,927
Intangible assets	1,128	1,945
Restructuring	1,947	2,244
Deferred revenue	1,843us-gaap_DeferredTaxAssetsDeferredIncome	2,401us-gaap_DeferredTaxAssetsDeferredIncome
Accrued rent	4,635	4,551
Accrued insurance	1,107	1,322
All other	5,627us-gaap_DeferredTaxAssetsOther	3,776us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	52,154us-gaap_DeferredTaxAssetsGross	52,799us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities:
Property and equipment	47,860	53,279
Inventory	51,616	50,514
Goodwill	53,628	44,082
Convertible debt interest	789	1,055
Leases	10,585	8,912
All other	1,402us-gaap_DeferredTaxLiabilitiesOther	1,616us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	165,880us-gaap_DeferredIncomeTaxLiabilities	159,458us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liability	$ (113,726)us-gaap_DeferredTaxLiabilities	$ (106,659)us-gaap_DeferredTaxLiabilities

Deferred tax liabilities convertible debt interest.

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Amount of deferred tax liability attributable to taxable temporary differences.

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The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from employee benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated losses under self insurance.

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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