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LONG-TERM DEBT - Components of Interest Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2022
Apr. 09, 2021
Jun. 18, 2014
Debt Instrument [Line Items]          
Losses on early retirements of debt $ 237 $ 0 $ 2,474    
2021 Notes          
Debt Instrument [Line Items]          
Interest expense at coupon or contractual rate 788 787 639    
Amortization of deferred debt issuance costs 1,776 1,762 1,416    
Total interest expense 2,564 2,549 2,055    
Coupon interest rate       0.25%  
2014 Notes          
Debt Instrument [Line Items]          
Interest expense at coupon or contractual rate 0 0 1,933    
Amortization of deferred debt issuance costs 0 0 522    
Total interest expense 0 0 2,455    
Coupon interest rate         1.50%
Credit Agreement          
Debt Instrument [Line Items]          
Interest expense at coupon or contractual rate 6,896 4,114 3,366    
Impact of interest rate swap agreement 0 0 1,014    
Amortization of debt discounts 5 19 18    
Amortization of deferred debt issuance costs 739 863 930    
Losses on early retirements of debt 237 0 0    
Total interest expense $ 7,877 $ 4,996 $ 5,328