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Stock-Based Compensation - Additional Information (Details) (USD $)
 3 Months Ended 6 Months Ended
May 02, 2015
May 03, 2014
Jan. 31, 2015
Aug. 03, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Potential value of awards over the four-year period $ 19,400,000dxlg_DollarValueOfProjectedBenefitObligationAward      
Stock compensation expense 598,000us-gaap_ShareBasedCompensation 747,000us-gaap_ShareBasedCompensation    
Stock options granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross    
Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Increase in authorized shares 7,250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		      
Shares available for future grant 1,116,570us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		      
2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance based compensation description If the Company’s stock price is $6.75, the 50% payout in restricted shares will be increased by 20% and if the stock price is $7.25 or higher, the 50% payout in restricted shares will be increased by 30%.      
Stock compensation expense     8,700,000us-gaap_ShareBasedCompensation
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember		  
Maximum | Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Net revenue targets 600,000,000dxlg_NetRevenueTargets
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Percentage of operating margin 8.00%dxlg_OperatingMarginPercent
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Payout percentage 100.00%dxlg_PayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Maximum | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Payout percentage     100.00%dxlg_PayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Closing stock price     $ 7.25us-gaap_SharePrice
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Projected benefit obligation percentage     30.00%dxlg_IncreaseInPayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Minimum | Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Net revenue targets 510,000,000dxlg_NetRevenueTargets
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Payout percentage 50.00%dxlg_PayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Minimum | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Payout percentage     80.00%dxlg_PayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Closing stock price     $ 6.75us-gaap_SharePrice
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Projected benefit obligation percentage     20.00%dxlg_IncreaseInPayoutPercentage
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Period 1        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting plan 20.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_VestingAxis
= dxlg_PeriodOneMember		      
Period 2        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting plan 40.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_VestingAxis
= dxlg_PeriodTwoMember		      
Period 3        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting plan 40.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_VestingAxis
= dxlg_PeriodThreeMember		      
Chief Executive Officer        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of salary       100.00%dxlg_ShareBasedCompensationAwardAsPercentageOfBaseSalary
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
Senior Executive        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of salary       70.00%dxlg_ShareBasedCompensationAwardAsPercentageOfBaseSalary
/ us-gaap_TitleOfIndividualAxis
= dxlg_SeniorExecutiveMember
Other Participants        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of salary       50.00%dxlg_ShareBasedCompensationAwardAsPercentageOfBaseSalary
/ us-gaap_TitleOfIndividualAxis
= dxlg_OtherParticipantsMember
Non Employee Directors        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares of common stock issued 5,581us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= dxlg_NonEmployeeDirectorsMember		      
Fair value of common stock issued 28,562us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= dxlg_NonEmployeeDirectorsMember		      
Restricted stocks        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation       50.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Shares granted   5,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		    
Restricted stocks | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation     50.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember		  
Stock Options        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation       25.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Cash        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation       25.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_CashMember
Cash | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation     50.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_CashMember
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember		  
Time Based Vesting Schedule        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation 50.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= dxlg_TimeBasedVestingScheduleMember		      
Performance Based Vesting Schedule        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of benefit obligation 50.00%dxlg_ProjectedBenefitObligationPercentage
/ us-gaap_AwardTypeAxis
= dxlg_PerformanceBasedVestingScheduleMember		      
Stock compensation expense 0us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= dxlg_PerformanceBasedVestingScheduleMember		      
Performance Based Vesting Schedule | Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Net revenue targets 550,000,000dxlg_NetRevenueTargets
/ us-gaap_AwardTypeAxis
= dxlg_PerformanceBasedVestingScheduleMember
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		      
2016 Wrap-Around Plan | Maximum | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance based compensation percentage     100.00%dxlg_TargetedCompensationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
2016 Wrap-Around Plan | Minimum | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance based compensation percentage     80.00%dxlg_TargetedCompensationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
2016 Wrap-Around Plan | Threshold | 2016 Long Term Incentive Wrap Around Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance based compensation percentage     50.00%dxlg_TargetedCompensationPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= dxlg_TwentyOneSixLongTermIncentiveWrapAroundPlanMember
/ us-gaap_RangeAxis
= dxlg_ThresholdMember		  
Awards Other than Stock Options and Stock Appreciation Rights | Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Increase in authorized shares 4,250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= dxlg_AwardsOtherThanStockOptionsAndStockAppreciationRightsMember
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		      
Shares available for future grant 1,009,229us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= dxlg_AwardsOtherThanStockOptionsAndStockAppreciationRightsMember
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		      
Deferred Stock        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares available for future grant 4,962us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= dxlg_DeferredStockMember		      
Shares granted   2,751us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= dxlg_DeferredStockMember		    
Deferred Stock | Employee Stock Plan, 2006 Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares granted 4,962us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= dxlg_DeferredStockMember
/ us-gaap_PlanNameAxis
= dxlg_EmployeeStockPlanTwentyZeroSixPlanMember		 [1]      
Time Vested Stock Options And Time Based Restricted Stock Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Unrecognized stock compensation cost 2,300,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= dxlg_TimeVestedStockOptionsAndTimeBasedRestrictedStockAwardsMember		      
Unrecognized stock compensation cost weighted average recognition period 16 years 6 months      
Performance-Based Stock Options and Restricted Stock Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Unrecognized stock compensation cost $ 7,100,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= dxlg_PerformanceBasedStockOptionsAndRestrictedStockAwardsMember		      
[1] During the first three months of fiscal 2015, the Company granted 4,962 shares of deferred stock, with a fair value of approximately $25,554 to certain directors as compensation in lieu of cash, in accordance with their irrevocable elections. The shares of deferred stock will vest three years from the date of grant or at separation of service, based on the irrevocable election of each director.