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Benefit Plans (Details) (USD $)
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Compensation and Retirement Disclosure [Abstract]      
Employee contribution limit per calendar year $ 17,500dds_DefinedContributionPlanEmployeeContributionLimit    
Employee contribution limit per calendar year for employees attaining at least 50 years of age 23,000dds_DefinedContributionPlanEmployeeContributionLimitByPlanParticipantsAttainingAtleast50YearsAge    
Requisite age of eligible employees for additional contribution 50 years    
Employee contribution limit per calendar year (as a percent of eligible pay) 75.00%dds_DefinedContributionPlanEmployeeContributionLimitPercentageOfCompensation    
Requisite service period of employee, to receive a employer's matching contribution 1 year    
Employee's contribution matched by employer (as a percent of elective deferrals) 6.00%dds_DefinedContributionPlanEmployeeContributionEligibleForEmployersContributionPercentageOfElectiveDeferrals    
Percentage of elective deferrals, matched 100% by employer 1.00%dds_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne    
Employer match of employee contributions of first 1% of elective deferrals (as a percent) 100.00%dds_DefinedContributionPlanEmployerMatchLevelOne    
Percentage of elective deferrals, matched 50% by employer 5.00%dds_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo    
Employer match of employee contributions of next 5% of elective deferrals (as a percent) 50.00%dds_DefinedContributionPlanEmployerMatchLevelTwo    
Vesting period for employer's contribution 2 years    
Benefit plan expense 18,000,000us-gaap_DefinedContributionPlanCostRecognized 18,000,000us-gaap_DefinedContributionPlanCostRecognized 16,000,000us-gaap_DefinedContributionPlanCostRecognized
Change in benefit obligation:      
Benefit obligation at beginning of year 173,870,000us-gaap_DefinedBenefitPlanBenefitObligation 175,534,000us-gaap_DefinedBenefitPlanBenefitObligation  
Service cost 4,396,000us-gaap_DefinedBenefitPlanServiceCost 4,237,000us-gaap_DefinedBenefitPlanServiceCost 3,267,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost 7,644,000us-gaap_DefinedBenefitPlanInterestCost 6,782,000us-gaap_DefinedBenefitPlanInterestCost 7,294,000us-gaap_DefinedBenefitPlanInterestCost
Actuarial loss (gain) 13,850,000us-gaap_DefinedBenefitPlanActuarialGainLoss (1,214,000)us-gaap_DefinedBenefitPlanActuarialGainLoss  
Benefits paid (2,838,000)us-gaap_DefinedBenefitPlanBenefitsPaid (2,722,000)us-gaap_DefinedBenefitPlanBenefitsPaid  
Plan curtailment 0us-gaap_DefinedBenefitPlanCurtailments (8,747,000)us-gaap_DefinedBenefitPlanCurtailments  
Benefit obligation at end of year 196,922,000us-gaap_DefinedBenefitPlanBenefitObligation 173,870,000us-gaap_DefinedBenefitPlanBenefitObligation 175,534,000us-gaap_DefinedBenefitPlanBenefitObligation
Change in Pension Plan assets:      
Fair value of Pension Plan assets at beginning of year 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets  
Employer contribution 2,838,000us-gaap_DefinedBenefitPlanContributionsByEmployer 2,722,000us-gaap_DefinedBenefitPlanContributionsByEmployer  
Benefits paid (2,838,000)us-gaap_DefinedBenefitPlanBenefitsPaid (2,722,000)us-gaap_DefinedBenefitPlanBenefitsPaid  
Fair value of Pension Plan assets at end of year 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Funded status (Pension Plan assets less benefit obligation) (196,922,000)us-gaap_DefinedBenefitPlanFundedStatusOfPlan (173,870,000)us-gaap_DefinedBenefitPlanFundedStatusOfPlan  
Amounts recognized in the balance sheets:      
Accrued benefit liability (196,922,000)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent (173,870,000)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent  
Net amount recognized (196,922,000)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet (173,870,000)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet  
Net actuarial loss 50,153,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax 38,963,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax  
Prior service cost 0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax 0us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax  
Net amount recognized 50,153,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax 38,963,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax  
Net actuarial loss 3,697,000us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss    
Prior service cost 0us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit    
Net amount recognized 3,697,000us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear    
Accumulated benefit obligation at end of year $ (188,126,000)us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation $ (167,632,000)us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation