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Intangible Assets Expected Future Amortization Expense (Details) - USD ($)
$ in Thousands
Jul. 31, 2020
Jan. 31, 2020
Business Combinations [Abstract]    
Remaining fiscal 2021 $ 26,415  
Fiscal 2022 45,567  
Fiscal 2023 41,525  
Fiscal 2024 37,015  
Fiscal 2025 31,182  
Thereafter 27,420  
Total $ 209,124 $ 238,415