Summary of Costs Recognized Within Restructuring Charges on Consolidated Income Statement (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Cash restructuring charges
Office space consolidation charges		$ 8,571,000
Severance and related employee costs		7,816,000
Other corporate items		1,365,000
Total restructuring charges	$ 0	$ 17,752,000