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Build-to-Suit Lease (Narrative) (Details) (Long Beach, California campus [Member]) | 3 Months Ended
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Dec. 31, 2014
Long Beach, California campus [Member] |
Property, Plant and Equipment [Line Items] |
Lessee Leasing Arrangements, Capital Leases, Term of Contract | 15 years

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of the lessee's capital 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: | uti_LesseeLeasingArrangementsCapitalLeasesTermofContract
Namespace Prefix: | uti_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration