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Significant Components of Net Deferred Income Taxes (Detail) - USD ($)
$ in Thousands
Dec. 30, 2018
Dec. 31, 2017
Components Of Deferred Income Tax Assets And Liabilities [Line Items]    
Insurance reserves $ 10,253 $ 9,957
Equity compensation 9,705 9,277
Other accruals and reserves 10,636 8,532
Foreign tax credit 4,600 0
Other 6,029 4,801
Total deferred income tax assets 41,223 32,567
Depreciation, amortization and asset basis differences 10,505 4,655
Capitalized software 25,192 22,248
Gain on debt extinguishments   2,914
Total deferred income tax liabilities 35,697 29,817
Net deferred income taxes $ 5,526 $ 2,750