Share-Based Compensation Performance Shares (Details)	6 Months Ended
Jul. 29, 2017 shares $ / shares	Jul. 30, 2016 $ / shares
Performance shares
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period	3 years
Settlement at the end of vesting period	Converts to common stock ranging from zero to a maximum of twice the number of granted shares outstanding on the vesting date
Number of shares
Outstanding at January 28, 2017	488,723
Granted	600,000
Outstanding at July 29, 2017	1,088,723
Weighted average grant date fair value (in dollars per share)
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 7.75
Performance shares \| Maximum
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Multiple of the number of granted shares outstanding for issuable shares	2
Performance shares \| Minimum
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Multiple of the number of granted shares outstanding for issuable shares	0
2015 Performance Shares Granted
Number of shares
Outstanding at January 28, 2017	158,490
Outstanding at July 29, 2017	158,490
Weighted average grant date fair value (in dollars per share)
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 28.33
2016 Performance Shares Granted
Number of shares
Outstanding at January 28, 2017	330,233
Outstanding at July 29, 2017	330,233
Weighted average grant date fair value (in dollars per share)
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 8.69	$ 8.69
2017 Performance Shares Granted
Number of shares
Granted	600,000
Outstanding at July 29, 2017	600,000
Weighted average grant date fair value (in dollars per share)
Weighted average grant date fair value (in dollars per share) \| $ / shares	$ 1.80

Multiple of the number of granted shares outstanding for calculating the number of issuable shares.

No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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