Business Organization and Summary of Significant Accounting Policies - Accounting for the Impairment of Long-lived Assets and Assets Held for Sale (Details) $ in Millions	12 Months Ended
Jan. 28, 2017 USD ($) store	Jan. 30, 2016 USD ($) store	Jan. 31, 2015 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Asset impairment charges	$ 2.5	$ 1.4	$ 1.3
Number of under-performing stores to close \| store	150	150
Additional impairment charges		$ 12.5	$ 5.4

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration