Number of financial covenants under the debt agreement.

No definition available.

Name:	ctrn_DebtInstrumentNumberOfCovenants
Namespace Prefix:	ctrn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of expected borrowings subsequent to the payment of cash dividends within a specified period, under the terms of the line of credit facility covenants.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityAccordionBorrowingCapacity
Namespace Prefix:	ctrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the maximum borrowing capacity under the credit facility when the accordion option is exercised, without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityAccordionExpansionMaximumBorrowingCapacity
Namespace Prefix:	ctrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of outstanding borrowings prior to the payment of cash dividends within a specified period, under the terms of the line of credit facility covenants.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityCovenantsAmountOutstandingPriorToCashDividendPaymentWithInSpecifiedPeriod
Namespace Prefix:	ctrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of expected borrowings subsequent to the payment of cash dividends within specified period, under the terms of the line of credit facility covenants.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the period prior to the payment of cash dividends during which no borrowings may be outstanding, under the terms of the line of credit facility covenants.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityCovenantsPeriodPriorToCashDividendPaymentWithNoOutstandingBorrowings
Namespace Prefix:	ctrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period subsequent to the payment of cash dividends during which no borrowings may be expected, under the terms of the line of credit facility covenants.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityCovenantsPeriodSubsequentToCashDividendPaymentWithNoBorrowingsExpected
Namespace Prefix:	ctrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the term of credit facility.

+ References

No definition available.

+ Details

Name:	ctrn_LineOfCreditFacilityTerm
Namespace Prefix:	ctrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ctrn_AmendmentToCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ctrn_DebtInstrumentVariableRateBaseAxis=ctrn_DebtInstrumentVariableRateBaseLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ctrn_DebtInstrumentTypeOfBorrowingsAxis=ctrn_LIBORRateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	ctrn_DebtInstrumentVariableRateBaseAxis=ctrn_DebtInstrumentVariableRatePrimeRateMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ctrn_DebtInstrumentTypeOfBorrowingsAxis=ctrn_BaseRateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	ctrn_DebtInstrumentVariableRateBaseAxis=ctrn_DebtInstrumentVariableRateBaseFederalFundsRateMember
Namespace Prefix:
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Revolving Line of Credit (Details) - Line of Credit $ in Millions			12 Months Ended
	Aug. 18, 2015 USD ($)	Oct. 27, 2011 USD ($)	Jan. 28, 2017 USD ($) item
Revolving Line of Credit
Term of credit facility		5 years
Maximum borrowing capacity		$ 50
Number of covenants \| item			1
Unused commitment fee (as a percent)			0.25%
Amount of outstanding borrowings prior to cash dividend payment within specified period, per covenant			$ 0
Period prior to cash dividend payment when no borrowings may be outstanding, per covenant			30 days
Amount of expected borrowings subsequent to cash dividend payment within specified period, per covenant			$ 0
Period subsequent to cash dividend payment when no borrowings may be expected, per covenant			30 days
Borrowings outstanding			$ 0
Amendment to credit facility
Revolving Line of Credit
Maximum borrowing capacity	$ 50
Borrowing capacity, accordion feature	25
Maximum borrowing capacity including accordion expansion	$ 75
LIBOR \| Amendment to credit facility \| Debt Instrument, Variable Rate Base LIBOR \| LIBOR Rate Loans \| Minimum
Revolving Line of Credit
Margin added to variable rate (as a percent)	1.25%
LIBOR \| Amendment to credit facility \| Debt Instrument, Variable Rate Base LIBOR \| LIBOR Rate Loans \| Maximum
Revolving Line of Credit
Margin added to variable rate (as a percent)	1.50%
Prime Rate \| Amendment to credit facility \| Debt Instrument Variable Rate Prime Rate \| Base Rate Loans \| Minimum
Revolving Line of Credit
Margin added to variable rate (as a percent)	0.25%
Prime Rate \| Amendment to credit facility \| Debt Instrument Variable Rate Prime Rate \| Base Rate Loans \| Maximum
Revolving Line of Credit
Margin added to variable rate (as a percent)	0.50%
Federal Fund Rate \| Amendment to credit facility \| Debt Instrument, Variable Rate Base Federal Funds Rate \| Base Rate Loans \| Minimum
Revolving Line of Credit
Margin added to variable rate (as a percent)	0.75%
Federal Fund Rate \| Amendment to credit facility \| Debt Instrument, Variable Rate Base Federal Funds Rate \| Base Rate Loans \| Maximum
Revolving Line of Credit
Margin added to variable rate (as a percent)	1.00%