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Activity of Sales Return Reserve (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Revenue Recognition, Allowances [Line Items] |  |  |
Balance at beginning of year | $ 17,089 urbn_SalesReturnReserve | $ 14,448 urbn_SalesReturnReserve | $ 10,967 urbn_SalesReturnReserve
Additions | 80,390 urbn_IncreaseInSalesReturnReserve | 64,313 urbn_IncreaseInSalesReturnReserve | 49,412 urbn_IncreaseInSalesReturnReserve
Deductions | (77,675)urbn_DecreaseInSalesReturnReserve | (61,672)urbn_DecreaseInSalesReturnReserve | (45,931)urbn_DecreaseInSalesReturnReserve
Balance at end of year | $ 19,804 urbn_SalesReturnReserve | $ 17,089 urbn_SalesReturnReserve | $ 14,448 urbn_SalesReturnReserve

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- Definition Decrease In Sales Return Reserve + References No definition available. + Details
Name: | urbn_DecreaseInSalesReturnReserve
Namespace Prefix: | urbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Increase In Sales Return Reserve + References No definition available. + Details
Name: | urbn_IncreaseInSalesReturnReserve
Namespace Prefix: | urbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | urbn_RevenueRecognitionAllowancesLineItems
Namespace Prefix: | urbn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sales Return Reserve + References No definition available. + Details
Name: | urbn_SalesReturnReserve
Namespace Prefix: | urbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant