Store Impairment and Restructuring Charges - Additional Information (Detail) - Store	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Restructuring And Related Activities [Abstract]
Number of stores identified for closure			21	55
Number of stores closed	20	21		35