Acquisitions and Dispositions (Details 3) (USD $) In Millions, unless otherwise specified	May 31, 2011
Notes (Details)
Oil and gas properties sold in a single transaction representing a percentage of year-end proved reserves	7900.00%
Gross sale price of oil and gas properties sold in a single transaction	$ 222.3
Buyer's assumption of asset retirement obligations, oil and gas properties sold in a single transaction	72.7
Net proceeds from sale of oil and gas properties in a single transaction	173.3
Buyer's prepayment of purchase price for oil and gas properties sold in a single transaction	11.1
Consolidated gain on sale of oil and gas properties sold in a single transaction, net of closing adjustments	58.2
Employee retention and incentive benefits paid in connection with sale of assets	$ 2.7

The dollar value of asset retirement obligations associated with oil and gas properties sold to a third party.

No definition available.

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No authoritative reference available.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Recorded amount of net gain on the sale of oil and gas properties to a third party.

No definition available.

Name:	tti_Gainonsaleofproperties
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Data Type:	xbrli:monetaryItemType
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Base price under sales agreement of oil and gas properties sold to a third-party in a single transaction.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Base sales price of oil and gas properties sold to a third party in a single transaction less prepayments and purchase price adjustments.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Prepayment under sales agreement for oil and gas properties sold to a third-party in a single transaction.

No definition available.

Name:	tti_Prepaymentofbasesaleprice
Namespace Prefix:	tti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount during the reporting period of proved and unproved reserves sold to a third-party in a single transaction.

No definition available.

Name:	tti_Singlesalepercentagesoldreserves
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Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant