Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016	Jan. 28, 2017
Income Tax [Line Items]
Income tax expense (benefit)		$ 6,216,000	$ 1,778,000	$ 9,886,000	$ (2,567,000)
Effective income tax rate		32.10%	41.40%	83.70%	38.90%
Unrecognized tax benefits	$ 6,800,000	$ 6,800,000		$ 6,800,000		$ 1,400,000
Amended federal tax return claiming refund	5,400,000
Income tax benefit from amended tax return		0
Exposures related to unrecognized tax benefits	0	0		$ 0
Period of unrecognized tax benefits change				12 months
Other Non-Current Obligations [Member]
Income Tax [Line Items]
Unrecognized tax benefits	$ 1,400,000	1,400,000		$ 1,400,000		$ 1,400,000
Accounting Standard Update 2016-09 [Member]
Income Tax [Line Items]
Net excess tax benefits from stock-based compensation		$ 1,900,000		$ 4,300,000