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Commitments and Contingencies - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Jan. 31, 2017 USD ($) $ / Employee_Contribution Store | Jan. 31, 2016 USD ($) | Jan. 31, 2015 USD ($)
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of lease commitment not opened | Store | 13 |  |
Commitments for un-fulfilled purchase orders | $ 418,221 |  |
Commitments with construction contractors | $ 6,409 |  |
U.S. based employees age limit to participate in 401(k) Saving Plan | 18 years |  |
Employer matching contribution per employee | $ / Employee_Contribution | 0.25 |  |
Percentage of employee contribution for first threshold limit of employer contribution | 6.00% |  |
Employees contribution percentage vested | 100.00% |  |
Percentage of employers contribution per year vested | 20.00% |  |
Company's contribution to Savings Plan | $ 2,455 | $ 2,121 | $ 1,708
Nonqualified Deferred Compensation Plan |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Employer matching contribution per employee | $ / Employee_Contribution | 0.25 |  |
Percentage of employee contribution for first threshold limit of employer contribution | 6.00% |  |
Employees contribution percentage vested | 100.00% |  |
Percentage of employers contribution per year vested | 100.00% |  |
Company's contribution to Savings Plan | $ 84 | 105 | $ 100
Deferred compensation obligation | 4,673 | 4,673 |
Aggregate market value of investments | $ 4,363 | $ 4,363 |
Minimum |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Operating lease, renewal option | 5 years |  |
Percentage of compensation deferred by employees under Saving Plan | 1.00% |  |
Maximum |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Operating lease, renewal option | 10 years |  |
Percentage of compensation deferred by employees under Saving Plan | 25.00% |  |

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date. + References No definition available. + Details
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