Fair Value Measurements (Details) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Aug. 01, 2015
USD ($)
|
Aug. 02, 2014
USD ($)
stores
|
Aug. 01, 2015
USD ($)
|
Aug. 02, 2014
USD ($)
stores
|
Jan. 31, 2015
USD ($)
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Impairment charge | $ 0 | $ 2,000 | $ 0 | $ 2,800 | |
| Number of stores impaired during the period | stores | 2 | 6 | |||
| Level 1 [Member] | Recurring [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| U.S. treasury securities money market funds | 2,002 | 2,002 | $ 166,602 | ||
| Level 2 [Member] | Recurring [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| U.S. treasury securities money market funds | 0 | 0 | 0 | ||
| Level 3 [Member] | Recurring [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| U.S. treasury securities money market funds | $ 0 | $ 0 | $ 0 | ||