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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details) - USD ($)
$ in Thousands
Jan. 27, 2019
Jan. 28, 2018
Fiscal year 2020 $ 16,522  
Fiscal year 2021 7,978  
Fiscal year 2022 4,655  
Fiscal year 2023 3,714  
Fiscal year 2024 1,389  
Thereafter 0  
Total expected amortization expense 34,258 $ 57,907
Core technologies    
Fiscal year 2020 14,239  
Fiscal year 2021 7,389  
Fiscal year 2022 4,655  
Fiscal year 2023 3,714  
Fiscal year 2024 1,389  
Thereafter 0  
Total expected amortization expense 31,386 49,302
Customer relationships    
Fiscal year 2020 2,283  
Fiscal year 2021 589  
Fiscal year 2022 0  
Fiscal year 2023 0  
Fiscal year 2024 0  
Thereafter 0  
Total expected amortization expense $ 2,872 $ 8,605