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Summary of Significant Accounting Policies - Revenue Recognition and Cost of Sales (Details) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 03, 2018 | Jan. 28, 2017 | Jan. 30, 2016
Revenue Recognition |  |  |
Maximum period allowed to customers to return merchandise after the date of sale | 30 days |  |
Period after the year end for entity to reduce revenue for each fiscal year using a combination of actual and estimated return information for the returns | 30 days |  |
Period within which if merchandise is not fully paid for, the customer is given a store credit for merchandise payments made | 60 days |  |
Amount amortized into income for gift cards not expected to be redeemed | $ 0 | $ 0 |
Immateriality of the gift card liability | 1,000 | 800 |
Cost of Sales |  |  |
Distribution center costs | $ 17,400 | $ 17,200 | $ 15,700

X
- Definition Represents the amount amortized into income for gift cards not expected to be redeemed (breakage). + References No definition available. + Details
Name: | ctrn_AmountAmortizedInToIncomeForGiftCardsNotExpectedToBeRedeemed
Namespace Prefix: | ctrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of distribution center costs. + References No definition available. + Details
Name: | ctrn_DistributionCenterCosts
Namespace Prefix: | ctrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of immateriality of gift card liability due to the lack of time that has lapsed since cards began being sold under the gift card program. + References No definition available. + Details
Name: | ctrn_GiftCardLiabilityImmaterialAmount
Namespace Prefix: | ctrn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the maximum period allowed to the customers to return merchandise after the date of sale. + References No definition available. + Details
Name: | ctrn_MaximumPeriodAllowedToCustomersToReturnMerchandiseAfterDateOfSale
Namespace Prefix: | ctrn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period after the year end for entity to reduce revenue for each fiscal year using a combination of actual and estimated return of merchandise. + References No definition available. + Details
Name: | ctrn_PeriodAfterYearEndForEntityToReduceRevenueUsingCombinationOfActualAndEstimatedReturnOfMerchandise
Namespace Prefix: | ctrn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period within which if merchandise is not fully paid for, the customer is given a store credit for merchandise payments made. + References No definition available. + Details
Name: | ctrn_PeriodWithinWhichIfMerchandiseNotFullyPaidCustomerGetsStoreCredit
Namespace Prefix: | ctrn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CostOfRevenueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueRecognitionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration