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STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense by Type of Award (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Stock-Based Compensation Plans        
Stock-based compensation $ 25,694 $ 18,093 $ 44,063 $ 34,494
Equity Settled Awards        
Stock-Based Compensation Plans        
Stock-based compensation 25,690 18,084 44,053 34,489
Equity Settled Awards | Restricted stock units and restricted stock awards        
Stock-Based Compensation Plans        
Stock-based compensation 23,362 15,984 39,373 30,237
Equity Settled Awards | Stock bonus program and bonus share program        
Stock-Based Compensation Plans        
Stock-based compensation 2,328 2,100 4,680 4,252
Cash Settled Awards | Phantom stock units (cash-settled awards)        
Stock-Based Compensation Plans        
Stock-based compensation $ 4 $ 9 $ 10 $ 5