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Long-Term Debt, Derivatives and Letters of Credit - Additional Information (Detail)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended
Feb. 28, 2015
USD ($)
Feb. 28, 2015
Economic Hedge
USD ($)
Feb. 28, 2015
Economic Hedge
EUR (€)
Feb. 28, 2015
Standby Letters of Credit
USD ($)
May 31, 2014
Standby Letters of Credit
USD ($)
Feb. 28, 2015
Eurodollar Libor Rate
Line of Credit Facility [Line Items]            
Borrowing capacity $ 150us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity          
Basis spread on LIBOR Rate           1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_VariableRateAxis
= tisi_EurodollarLiborRateMember
Maturity period July 2016          
Debt issuance costs 0.8us-gaap_DebtIssuanceCosts          
Commitment fees on unused borrowing capacity           0.30%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_VariableRateAxis
= tisi_EurodollarLiborRateMember
Borrowing under credit facility 50.0us-gaap_LineOfCredit 13.8us-gaap_LineOfCredit
/ us-gaap_DerivativeInstrumentRiskAxis
= tisi_EconomicHedgeMember
12.3us-gaap_LineOfCredit
/ us-gaap_DerivativeInstrumentRiskAxis
= tisi_EconomicHedgeMember
     
Outstanding letter of credit       $ 13.1us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
$ 13.6us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember