Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016	Jan. 28, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Transfers out of Level 1 into Level 2	$ 0	$ 0	$ 0	$ 0
Transfers out of Level 2 into Level 1	0	0	0	0
Estimated Fair Value [Member] | Asset Based Credit Facility [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated fair value of term loan	341,000,000		341,000,000
Estimated Fair Value [Member] | LILO Term Loan [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated fair value of term loan	80,000,000		80,000,000
Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value measurement, purchases, sales, issuances, or settlements	0	$ 0	0	$ 0
Short-term investments [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total investments	0		0		$ 142,677,000
Long-term investments [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total investments	$ 0		$ 0		$ 33,212,000