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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Loss Contingencies [Line Items]      
Rents Received from Subleases $ 3.4 $ 4.8 $ 5.3
Percentage of Associates Represent By Union 8.00%    
Critical and declining zone fund status Less than 65 percent    
Minimum [Member]      
Loss Contingencies [Line Items]      
Projected insolvent period based on active to inactive participants ratio 15 years    
Maximum [Member]      
Loss Contingencies [Line Items]      
Status or red zone plans 65.00%    
Projected insolvent period based on active to inactive participants ratio 20 years