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STOCK-BASED COMPENSATION, (Non-vested Stock Options and SARs) (Details) (Non Vested Stock Options And SARS [Member], USD $)
12 Months Ended
Jan. 31, 2015
Non Vested Stock Options And SARS [Member]
 
Number of Shares [Roll Forward]  
Non-vested at February 1, 2014 (in shares) 292,075ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingNumber
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Vested (in shares) (204,687)ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsVestedInPeriod
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Forfeited (in shares) (17,625)ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsForfeituresInPeriod
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Outstanding at January 31, 2015 (in shares) 69,763ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingNumber
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Weighted Average Grant Date Fair Value [Abstract]  
Non-vested at February 1, 2014 (in dollars per share) $ 7.97ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Vested (in dollars per share) $ 7.67ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Forfeited (in dollars per share) $ 8.60ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsForfeitedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember
Outstanding at January 31, 2015 (in dollars per share) $ 8.69ssi_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedOptionsAndSarsOutstandingWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= ssi_NonVestedStockOptionsAndSarsMember