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Assets by Segment (Detail) - USD ($)
$ in Thousands
Dec. 29, 2018
Dec. 30, 2017
Assets:    
Assets $ 2,845,537 $ 2,659,724
Operating Segments | DSD Segment    
Assets:    
Assets 2,419,019 2,270,179
Operating Segments | Warehouse Segment    
Assets:    
Assets 353,220 296,157
Other    
Assets:    
Assets [1] $ 73,298 $ 93,388
[1] Represents the company’s corporate head office assets including primarily cash and cash equivalents.