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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) | 12 Months Ended
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Feb. 03, 2018 lease
Minimum |
Minimum lease term | 12 months
New Accounting Pronouncement ASU 2016-02 not yet adopted |
Number of leases | 549
Average remaining contractual rent period | 3 years

X
- Definition The average remaining contractual rent period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | ctrn_LesseeLeasingArrangementsOperatingLeasesAverageRemainingContractualRentPeriod
Namespace Prefix: | ctrn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units (items of property) under operating lease arrangements. + References No definition available. + Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=ctrn_NewAccountingPronouncementAsu201602NotYetAdoptedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |