Commitments and Contingencies - Additional Information - Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Long-term Purchase Commitment [Line Items]
Total rent expense under operating leases	$ 57,812	$ 49,685	$ 114,595	$ 98,844
Minimum [Member]
Long-term Purchase Commitment [Line Items]
Non-cancelable operating lease terms			3 years
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Non-cancelable operating lease terms			10 years