Benefit Plans (Detail) - Schedule of Share-based Compensation, Stock authorized under stock option plan (USD $)	12 Months Ended
	Feb. 02, 2013
Outstanding Shares (in Shares)	4,663,909
Outstanding Average Remaining Life	2 years 255 days
Outstanding Weighted Average Exercise Price	$ 6.45
Outstanding Average Intrinsic Value (in Dollars)	$ 1,104,050
Exercisable Shares (in Shares)	4,002,659
Exercisable Weighted Average Exercise Price	$ 7.14
Exercisable Aggregate Intrinsic Value (in Dollars)	379,250,000
Range1 [Member]
Exercise Price Range Minimum	$ 0.98
Exercise Price Range Maximum	$ 2.66
Outstanding Shares (in Shares)	777,500
Outstanding Average Remaining Life	6 years 219 days
Outstanding Weighted Average Exercise Price	$ 2.06
Outstanding Average Intrinsic Value (in Dollars)	1,104,050
Exercisable Shares (in Shares)	256,250
Exercisable Weighted Average Exercise Price	$ 2.00
Exercisable Aggregate Intrinsic Value (in Dollars)	$ 379,250,000
Range 2 [Member]
Exercise Price Range Minimum	$ 2.67
Exercise Price Range Maximum	$ 5.33
Outstanding Shares (in Shares)	2,102,964
Outstanding Average Remaining Life	1 year 292 days
Outstanding Weighted Average Exercise Price	$ 4.04
Exercisable Shares (in Shares)	1,962,964
Exercisable Weighted Average Exercise Price	$ 4.12
Range 3 [Member]
Exercise Price Range Minimum	$ 5.34
Exercise Price Range Maximum	$ 8.00
Outstanding Shares (in Shares)	260,550
Outstanding Average Remaining Life	4 years 73 days
Outstanding Weighted Average Exercise Price	$ 5.56
Exercisable Shares (in Shares)	260,550
Exercisable Weighted Average Exercise Price	$ 5.56
Range 4 [Member]
Exercise Price Range Minimum	$ 8.01
Exercise Price Range Maximum	$ 10.67
Outstanding Shares (in Shares)	815,400
Outstanding Average Remaining Life	1 year 73 days
Outstanding Weighted Average Exercise Price	$ 10.31
Exercisable Shares (in Shares)	815,400
Exercisable Weighted Average Exercise Price	$ 10.31
Range 5 [Member]
Exercise Price Range Minimum	$ 10.68
Exercise Price Range Maximum	$ 13.33
Range 6 [Member]
Exercise Price Range Minimum	$ 13.34
Exercise Price Range Maximum	$ 16.00
Outstanding Shares (in Shares)	707,495
Outstanding Average Remaining Life	2 years 73 days
Outstanding Weighted Average Exercise Price	$ 14.32
Exercisable Shares (in Shares)	707,495
Exercisable Weighted Average Exercise Price	$ 14.32