Rollforward of Liabilities Recognized in Consolidated Balance Sheets (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Restructuring And Related Activities [Abstract]
Accrued liability as of January 31, 2015	$ 12,456,000
Add: Costs incurred, excluding non-cash charges	0	$ 17,752,000
Less: Cash payments	(10,015,000)
Accrued liability as of January 30, 2016	$ 2,441,000	$ 12,456,000