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Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended			3 Months Ended
	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May 03, 2014	Feb. 01, 2014	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013	May 02, 2015
Subsequent Event [Line Items]
Retirement expense, per diluted share	$ 0.87us-gaap_EarningsPerShareDiluted	$ 0.07us-gaap_EarningsPerShareDiluted	$ (0.06)us-gaap_EarningsPerShareDiluted	$ 0.12us-gaap_EarningsPerShareDiluted	$ 0.69us-gaap_EarningsPerShareDiluted	$ 0.06us-gaap_EarningsPerShareDiluted	$ (0.03)us-gaap_EarningsPerShareDiluted	$ 0.10us-gaap_EarningsPerShareDiluted	$ 1.00us-gaap_EarningsPerShareDiluted	$ 0.82us-gaap_EarningsPerShareDiluted	$ 0.77us-gaap_EarningsPerShareDiluted
Subsequent Event [Member] \| Chief Executive Officer [Member]
Subsequent Event [Line Items]
Retirement expense before tax												$ 600,000
Retirement expense after tax												$ 366,000
Retirement expense, per diluted share												$ (0.02)

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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