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Leases - Assets Held Under Capital Leases (Detail) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Capital Leased Assets [Line Items]    
Assets under capital leases $ 64,215 $ 64,125
Less accumulated amortization and depreciation 30,774 29,518
Net assets under capital leases 33,441 34,607
Buildings and Improvements [Member]    
Capital Leased Assets [Line Items]    
Assets under capital leases 57,326 60,398
Equipment [Member]    
Capital Leased Assets [Line Items]    
Assets under capital leases $ 6,889 $ 3,727