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Accumulated Other Comprehensive Loss: (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
May 02, 2015
May 03, 2014
Changes in the entity's accumulated other comprehensive loss by component, net of related income taxes    
Beginning balance $ (30,154)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (23,618)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total other comprehensive income, net of taxes 844us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (247)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Ending balance (29,310)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (23,865)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Foreign currency translation gain (loss)    
Changes in the entity's accumulated other comprehensive loss by component, net of related income taxes    
Beginning balance (30,900)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(23,283)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
Total other comprehensive income, net of taxes 1,236us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
94us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
Ending balance (29,664)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(23,189)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
Net unrealized gain (loss) on cash flow hedges    
Changes in the entity's accumulated other comprehensive loss by component, net of related income taxes    
Beginning balance 746us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
(335)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
Total other comprehensive income, net of taxes (392)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
(341)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
Ending balance $ 354us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember
$ (676)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember