Nature of Business and Significant Accounting Policies (Details) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2015 USD ($) item	Jan. 30, 2016 item	Jan. 31, 2015 USD ($) item	Feb. 01, 2014 item
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Number of Stores | item	518	518	518	560
Fiscal Period Duration		364 days
Period between inventory valuation and year-end		21 days
Calculation of Deferred Rent Expense [Member] | Cash and Cash Equivalents [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Effect of error on prior year results	$ 0.0
Calculation of Deferred Rent Expense [Member] | Merchandise Buying And Occupancy Expenses [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Effect of error on prior year results			$ 3.6
Calculation of Deferred Rent Expense [Member] | Operating Income (Loss) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Effect of error on prior year results	3.6		3.6
Calculation of Deferred Rent Expense [Member] | Net Income (Loss) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Effect of error on prior year results	$ 2.2		$ 2.2