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Commitments and Contingencies Commitment and Contingencies (Details) $ in Millions | Jun. 30, 2019 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Amounts of material contingent liabilities remaining, performance bonds | $ 47.0

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- Definition Discontinued Operation, Amounts of Material Contingent Liabilities Remaining, Performance Bonds + References No definition available. + Details
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Namespace Prefix: | tti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration