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

The number of non-vested equity-based payment instruments that validly exist and are outstanding as of the balance sheet date.

No definition available.

Name:	ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingNumber
Namespace Prefix:	ssi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The weighted average fair value of nonvested awards on equity-based plans (for example, options, 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.

No definition available.

Name:	ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingWeightedAverageGrantDateFairValue
Namespace Prefix:	ssi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

The number of equity-based payment instruments that vested during the reporting period.

No definition available.

Name:	ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsVestedInPeriod
Namespace Prefix:	ssi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The weighted average fair value as of grant date pertaining to an equity-based award plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

No definition available.