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Commitments and Contingencies - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Jan. 31, 2019 USD ($) $ / Employee_Contribution Store | Jan. 31, 2018 USD ($) $ / Employee_Contribution | Jan. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of lease commitment not opened | Store | 11 |  |
Commitments for un-fulfilled purchase orders | $ 511,410 |  |
Commitments with construction contractors | $ 49,118 |  |
U.S. based employees age limit to participate in 401(k) Saving Plan | 18 years |  |
Employer matching contribution per employee | $ / Employee_Contribution | 0.50 | 0.25 |
Percentage of employee contribution for first threshold limit of employer contribution | 6.00% | 6.00% |
Employees contribution percentage vested | 100.00% |  |
Percentage of employers contribution per year vested | 20.00% |  |
Company's contribution to Savings Plan | $ 3,549 | $ 2,602 | $ 2,455
Nonqualified Deferred Compensation Plan |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Employees contribution percentage vested | 100.00% |  |
Percentage of employers contribution per year vested | 100.00% |  |
Company's contribution to Savings Plan | $ 46 | 52 | $ 84
Deferred compensation obligation | 6,751 | 6,237 |
Aggregate market value of investments | $ 6,751 | $ 6,237 |
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 Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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