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Commitments and Contingencies Balances Outstanding under Proprietary Loan Program (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 79 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Sep. 30, 2014
Sep. 30, 2013
Activity Related to Balances Outstanding under our Proprietary Loan Program [Abstract]          
Amounts Outstanding Under Our Proprietary Loan Program $ 74,472uti_AmountsOutstandingUnderOurProprietaryLoanProgram $ 68,207uti_AmountsOutstandingUnderOurProprietaryLoanProgram $ 74,472uti_AmountsOutstandingUnderOurProprietaryLoanProgram $ 70,759uti_AmountsOutstandingUnderOurProprietaryLoanProgram $ 59,767uti_AmountsOutstandingUnderOurProprietaryLoanProgram
Loans extended 7,242uti_LoansExtendedDuringPeriodUnderOurProprietaryLoanProgram 10,209uti_LoansExtendedDuringPeriodUnderOurProprietaryLoanProgram      
Interest accrued 695uti_ProprietaryLoanProgramInterestAccruedDuringPeriod 726uti_ProprietaryLoanProgramInterestAccruedDuringPeriod      
Amounts collected and recognized (1,057)uti_TuitionAndInterestIncomeActualCashReceipts (700)uti_TuitionAndInterestIncomeActualCashReceipts (9,536)uti_TuitionAndInterestIncomeActualCashReceipts    
Amounts written off $ (3,167)uti_TuitionAndInterestAmountsWrittenOff $ (1,795)uti_TuitionAndInterestAmountsWrittenOff $ (34,722)uti_TuitionAndInterestAmountsWrittenOff