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STOCKHOLDERS' EQUITY - Textuals (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Stockholders Equity [Line Items] |  |  |
Number of shares authorized to be repurchased under prior program | 5,000,000 |  |
Common stock share acquired | 1,327,566 | 723,072 |
Aggregate purchase price | $ 35,216 | $ 20,311 |
Granted | 0 | 8,245 | 0
Lock up period after vesting | 2 years |  |
Proceeds from exercise of equity awards | $ 115 | $ 101 | $ 1,578
Long-Term Incentive Stock Plan |  |  |
Stockholders Equity [Line Items] |  |  |
Shares available for grant | 2,756,905 |  |
Restricted Stock Units (RSUs) |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 3 years |  |
Restricted Stock Units (RSUs) | Long-Term Incentive Stock Plan |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 3 years |  |
Share-based compensation expense | $ 17,500 | 19,700 | 19,700
Unrecognized stock compensation related to unvested option awards | 18,700 | 19,400 | 23,000
Fair value of award for which restrictions lapsed | $ 31,000 | 17,500 | 14,300
Performance Shares [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 3 years |  |
Lock up period after vesting | 2 years |  |
Performance Shares [Member] | Minimum |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 2 years |  |
Performance Shares [Member] | Maximum |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 5 years |  |
Stock Options |  |  |
Stockholders Equity [Line Items] |  |  |
Weighted average remaining term for stock options outstanding | 1 year 6 months |  |
Aggregate intrinsic value for stock options outstanding | $ 400 |  |
Aggregate intrinsic value for stock option exercisable | 400 |  |
Proceeds from exercise of equity awards | 100 |  |
Intrinsic value of stock options exercised | 300 | 400 |
Share-based compensation expense | $ 100 | $ 0 | $ 0
Stock Options | Maximum |  |  |
Stockholders Equity [Line Items] |  |  |
Vesting and exercise period of awards | 10 years |  |

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