Supplemental Disclosures of Cash Flow Information - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		8 Months Ended	12 Months Ended
	Sep. 09, 2018	Mar. 25, 2018	Sep. 09, 2018	Dec. 31, 2017
Schedule of Cash Flow, Supplemental [Line Items]
Capital expenditure accrual			$ 10.1	$ 4.0
Capital lease of supply chain center building expiration year		2033
Capital lease			$ 11.4
Lease One [Member]
Schedule of Cash Flow, Supplemental [Line Items]
Capital lease of supply chain center building expiration year	2036
Lease Two [Member]
Schedule of Cash Flow, Supplemental [Line Items]
Capital lease of supply chain center building expiration year	2037