Represents maximum percentage of employee contribution on post-tax basis.

No definition available.

Name:	ssi_DefinedContributionPlanMaximumPercentageOfEmployeeContributionOnPostTaxBasis
Namespace Prefix:	ssi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents maximum percentage of employee contribution on pre-tax basis.

+ References

No definition available.

+ Details

Name:	ssi_DefinedContributionPlanMaximumPercentageOfEmployeeContributionOnPreTaxBasis
Namespace Prefix:	ssi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum deferment as percentage of base salary under plan.

+ References

No definition available.

+ Details

Name:	ssi_MaximumDefermentAsPercentageOfBaseSalaryUnderPlan
Namespace Prefix:	ssi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum deferment as percentage of bonus under plan.

+ References

No definition available.

+ Details

Name:	ssi_MaximumDefermentAsPercentageOfBonusUnderPlan
Namespace Prefix:	ssi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum required age to be covered under the Plan.

+ References

No definition available.

+ Details

Name:	ssi_MinimumRequiredAgeToBeCoveredUnderPlan
Namespace Prefix:	ssi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of days of service to the entity for all full and part-time employees to be covered under the Plan.

+ References

No definition available.

+ Details

Name:	ssi_NumberOfDaysOfServiceToEntity
Namespace Prefix:	ssi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of deferred compensation plans during the period.

+ References

No definition available.

+ Details

Name:	ssi_NumberOfDeferredCompensationPlans
Namespace Prefix:	ssi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of common shares reserved for future issuance related to deferred compensation arrangements with individuals.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis=ssi_DeferredCompensationPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis=ssi_NonEmployeeDirectorEquityCompensationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensationAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BENEFIT PLANS (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
401(k) Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Number of days of service to the entity	60
Minimum required age to be covered under the Plan	21
Maximum percentage of employee contribution on pre-tax basis (in hundredths)	50.00%
Maximum percentage of employee contribution on post-tax basis (in hundredths)	10.00%
Matching pre-tax contribution by employer (in hundredths)	50.00%
Each participant's compensation under the plan (in hundredths)	6.00%
Matching contributions expense	$ 1.4	$ 1.5	$ 1.5
Deferred Compensation Plans [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Matching contributions expense	1.3	0.9	1.7
Number of deferred compensation plans	2
Maximum deferment as percentage of base salary under plan (in hundredths)	50.00%
Maximum deferment as percentage of bonus under plan (in hundredths)	100.00%
Employers contribution vested in percentage (in hundredths)	100.00%
Deferred Compensation Plans [Member] \| Executives and Officers [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Matching pre-tax contribution by employer (in hundredths)	100.00%
Each participant's compensation under the plan (in hundredths)	10.00%
Deferred Compensation Plans [Member] \| Key Employees [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Matching pre-tax contribution by employer (in hundredths)	50.00%
Each participant's compensation under the plan (in hundredths)	6.00%
Non-Employee Director Equity Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Entity's stock reserved to fund under this plan (in shares)	225,000
Deferred compensation liability under this plan		$ 0.2