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Summary of Significant Accounting Policies - Revenue Recognition and Cost of Sales (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Cost of Sales
Distribution center costs	$ 17.6	$ 17.4	$ 17.2

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

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- References

No definition available.

+ Details

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