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Segment Reporting - Additional Information (Detail)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014 Segment Brand Store	Jan. 31, 2013
Segment Reporting Information [Line Items]
Number of stores	546us-gaap_NumberOfStores	511us-gaap_NumberOfStores
Number of major customers exceeding ten percentage thresholds	0urbn_NumberOfMajorCustomersExceedingTenPercentageThreshold
Retail Operations
Segment Reporting Information [Line Items]
Number of reporting segments		2us-gaap_NumberOfOperatingSegments / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember
Number of brands		5urbn_NumberOfBrands / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember
Number of stores		546us-gaap_NumberOfStores / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember
Percentage of net sales	93.00%urbn_NetSalesAsPercentageOfConsolidatedNetSales / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember	93.00%urbn_NetSalesAsPercentageOfConsolidatedNetSales / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember	93.00%urbn_NetSalesAsPercentageOfConsolidatedNetSales / us-gaap_StatementBusinessSegmentsAxis = urbn_RetailOperationsMember
Wholesale Operations
Segment Reporting Information [Line Items]
Number of stores		1,600us-gaap_NumberOfStores / us-gaap_StatementBusinessSegmentsAxis = urbn_WholesaleOperationsMember

X

- Definition

Retail Segment net sales as a percentage of total consolidated Net Sales.

+ References

No definition available.

+ Details

Name:	urbn_NetSalesAsPercentageOfConsolidatedNetSales
Namespace Prefix:	urbn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Brands

+ References

No definition available.

+ Details

Name:	urbn_NumberOfBrands
Namespace Prefix:	urbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number Of Major Customers Exceeding Ten Percentage Threshold

+ References

No definition available.

+ Details

Name:	urbn_NumberOfMajorCustomersExceedingTenPercentageThreshold
Namespace Prefix:	urbn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStores
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=urbn_RetailOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=urbn_WholesaleOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: