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Supplemental Disclosures of Cash Flow Information - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 25, 2018
Jun. 17, 2018
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]      
Capital expenditure accrual   $ 2.2 $ 4.0
Capital lease of supply chain center building expiration year 2033    
Capital lease   $ 2.6