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Postemployment Benefits (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 3 Months Ended
Oct. 31, 2014
Employee
Dec. 31, 2014
Schedule of Postemployment Benefits [Line Items]    
Number of impacted employees due to reduction in workforce 50uti_NumberOfImpactedEmployeesDueToReductionInWorkforce  
Expiration Period Of Postemployment Benefits Agreements   2015-12
Postemployment benefit expense $ 1,200us-gaap_PostemploymentBenefitsPeriodExpense $ 1,278us-gaap_PostemploymentBenefitsPeriodExpense
Minimum [Member]    
Schedule of Postemployment Benefits [Line Items]    
Period for payment of post employment benefit   1 month
Maximum [Member]    
Schedule of Postemployment Benefits [Line Items]    
Period for payment of post employment benefit   24 months
Employee Severance [Member]    
Schedule of Postemployment Benefits [Line Items]    
Postemployment benefit expense   $ 1,081us-gaap_PostemploymentBenefitsPeriodExpense
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember