Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Asset Amortization (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 1,798	$ 3,770	$ 6,658	$ 12,821
Core technologies
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	1,798	3,337	6,069	10,971
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 0	$ 433	$ 589	$ 1,850

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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