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SHORT-TERM INVESTMENTS - Short Term Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]    
Amortized cost, Due in 1 year or less $ 659,147  
Amortized cost, Due in 1-2 years 166,673  
Cost or Amortized Cost 825,820 $ 1,307,895
Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]    
Fair value, Due in 1 year or less 656,775  
Fair value, Due in 1-2 years 163,285  
Total short-term investments $ 820,060 $ 1,308,692