Share Repurchases Under Equity Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Common stock share repurchased	0	2,625	251,910
Unpaid principal amount of notes payable for share repurchases	$ 19,390,000	$ 19,523,000
Interest expense related to notes payable for share repurchases	1,000,000	$ 1,000,000	$ 900,000
Promissory Notes [Member]
Equity, Class of Treasury Stock [Line Items]
Promissory notes issued	$ 0