Stock-Based Awards - Tax Benefit Recognized (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jan. 27, 2018	Jan. 25, 2020	Jan. 26, 2019	Jul. 29, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation	$ 13,277	$ 10,034	$ 20,187	$ 20,805
Income tax effect of stock-based compensation	$ 4,793	$ 2,482	$ 5,043	$ 7,996

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration