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EMPLOYEE BENEFIT PLANS - Textuals (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Defined Contribution Plan Disclosure [Line Items] |  |  |
Non-discretionary matching contribution | 100.00% |  |
Percentage of employee's compensation matched by employer | 3.00% |  |
Employer matching percentage of employee contributions | 50.00% |  |
Percentage of additional employee's compensation matched by employer | 2.00% |  |
DKI |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, matching contributions | $ 4.7 | $ 3.8 | $ 3.6

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- Definition Represents defined contribution plan additional maximum annual contributions per employee percent. + References No definition available. + Details
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- Definition Percentage Of Employer Contribution To Match Participant Contribution In Defined Contribution Plan + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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- Details
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Period Type: |