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Long-Term Debt and Capital Lease Obligations (Details) (USD $)
0 Months Ended 1 Months Ended 6 Months Ended
Apr. 16, 2013
Jul. 31, 2014
Payments
Mar. 31, 2012
Dec. 26, 2014
Jun. 30, 2014
Mar. 30, 2012
Payments
Jun. 30, 2013
Jun. 30, 2012
Line of Credit Facility [Abstract]                
Debt Instrument, Length Of Loan 5 years              
Capital Lease Obligations       1,916,000us-gaap_CapitalLeaseObligations        
Accumulated amortization       49,247,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 47,190,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment      
Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Senior Revolving Credit Facility, Maximum Borrowing Capacity 95,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
             
Letters of Credit, Amount Available For Issue 15,000,000trr_LettersofCreditAmountAvailableForIssue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
             
Subordinated Debt | Other note payable                
Line of Credit Facility [Abstract]                
Debt Instrument, Length Of Loan     3 years          
Long-term Debt   5,247,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
           
Number Of Installment Payments   11trr_NumberOfInstallmentPayments
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
      12trr_NumberOfInstallmentPayments
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
   
Debt Instrument, Face Amount           2,195,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
   
Debt Instrument, Frequency of Periodic Payment     quarterly          
Debt Instrument, Periodic Payment   482,000us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
190,000us-gaap_DebtInstrumentPeriodicPayment
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
         
Stated Finance Charge Rate   1.99%trr_StatedFinanceChargeRate
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
      2.74%trr_StatedFinanceChargeRate
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
   
Capital Lease Obligations                
Line of Credit Facility [Abstract]                
Debt, Weighted Average Interest Rate       2.55%us-gaap_DebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
       
Minimum | Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Line of Credit Facility, Current Borrowing Capacity 75,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
             
Furniture and Fixtures [Member] | Capital Lease Obligations                
Line of Credit Facility [Abstract]                
Capital Lease Obligations           161,000us-gaap_CapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
   
Furniture And Equipment | Capital Lease Obligations                
Line of Credit Facility [Abstract]                
Capital Lease Obligations             1,160,000us-gaap_CapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= trr_FurnitureAndEquipmentMember
756,000us-gaap_CapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= trr_FurnitureAndEquipmentMember
Assets Held under Capital Leases                
Line of Credit Facility [Abstract]                
Accumulated amortization       1,312,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_AssetsHeldUnderCapitalLeasesMember
       
RBS Citizen [Member]                
Line of Credit Facility [Abstract]                
Letters of Credit and Indebtedness, Outstanding       408,000trr_LettersofCreditandIndebtednessOutstanding
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
701,000trr_LettersofCreditandIndebtednessOutstanding
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
     
RBS Citizen [Member] | Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Letters of Credit Outstanding, Amount       2,398,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
3,148,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Line of Credit Facility, Current Borrowing Capacity       75,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
68,536,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
Line of Credit Facility, Remaining Borrowing Capacity       72,194,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
64,687,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
     
RBS Citizen [Member] | Minimum | Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Fixed Charge Coverage Ratio       1.25trr_LineOfCreditFacilityFixedChargeCoverageRatioCovenant
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
RBS Citizen [Member] | Minimum | Revolving Credit Facility | Prime Rate                
Line of Credit Facility [Abstract]                
Margin Percentage Related To Interest On Revolving Credit Facility       1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ trr_CreditAgreementInterestOptionAxis
= us-gaap_PrimeRateMember
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
RBS Citizen [Member] | Minimum | Revolving Credit Facility | LIBOR                
Line of Credit Facility [Abstract]                
Margin Percentage Related To Interest On Revolving Credit Facility       2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ trr_CreditAgreementInterestOptionAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
RBS Citizen [Member] | Maximum | Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Line of Credit Facility, Leverage Ratio       2trr_LineOfCreditFacilityLeverageRatio
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
RBS Citizen [Member] | Maximum | Revolving Credit Facility | Prime Rate                
Line of Credit Facility [Abstract]                
Margin Percentage Related To Interest On Revolving Credit Facility       1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ trr_CreditAgreementInterestOptionAxis
= us-gaap_PrimeRateMember
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
RBS Citizen [Member] | Maximum | Revolving Credit Facility | LIBOR                
Line of Credit Facility [Abstract]                
Margin Percentage Related To Interest On Revolving Credit Facility       2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ trr_CreditAgreementInterestOptionAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
       
June 30, 2014 [Member] | RBS Citizen [Member] | Revolving Credit Facility                
Line of Credit Facility [Abstract]                
Earnings Before Interest, Taxes, Deprecation and Amortization       20,000,000trr_EarningsBeforeInterestTaxesDeprecationAndAmortization
/ us-gaap_LineOfCreditFacilityAxis
= trr_RBSCitizenMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ trr_TimePeriodAxis
= trr_PeriodOneMember
       
Credit Agreement One [Member] | Subordinated Debt | Other note payable                
Line of Credit Facility [Abstract]                
Long-term Debt       0us-gaap_LongTermDebt
/ trr_CreditAgreementAxis
= trr_CreditAgreementOneMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember
       
Credit Agreement Two [Member] | Subordinated Debt | Other note payable                
Line of Credit Facility [Abstract]                
Long-term Debt       2,874,000us-gaap_LongTermDebt
/ trr_CreditAgreementAxis
= trr_CreditAgreementTwoMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SubordinatedDebtMember