Income Taxes - Summary of Income Tax Contingencies (Details) $ in Thousands	3 Months Ended
Apr. 28, 2019 USD ($)
Income Tax Disclosure [Abstract]
Balance at January 27, 2019	$ 18,293
Additions/(decreases) based on tax positions related to the current year	(12)
Balance at April 28, 2019	$ 18,281

Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration