Debt Instrument, Basis Spread on Variable Rate, Floor

No definition available.

Name:	tisi_DebtInstrumentBasisSpreadonVariableRateFloor
Namespace Prefix:	tisi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Service Coverage Ratio

+ References

No definition available.

+ Details

Name:	tisi_DebtServiceCoverageRatio
Namespace Prefix:	tisi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Minimum Consolidated Earnings Before Interest, Taxes, Depreciation, And Amortization

+ References

No definition available.

+ Details

Name:	tisi_MinimumConsolidatedEarningsBeforeInterestTaxesDepreciationAndAmortization
Namespace Prefix:	tisi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Net Leverage Ratio

+ References

No definition available.

+ Details

Name:	tisi_NetLeverageRatio
Namespace Prefix:	tisi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of equity interests of material first-tier foreign subsidiaries guaranteed to the line of credit facility

+ References

No definition available.

+ Details

Name:	tisi_Percentageofequityinterestsofmaterialfirsttierforeignsubsidiariesguaranteedtothelineofcreditfacility
Namespace Prefix:	tisi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio of Senior Secured Debt to EBITDA

+ References

No definition available.

+ Details

Name:	tisi_SeniorSecuredLeverageRatio
Namespace Prefix:	tisi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tisi_SeniorSecuredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT, LETTERS OF CREDIT AND DERIVATIVES - Credit Facility Narrative (Details)		3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 17, 2020 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2019 USD ($)	Aug. 30, 2019 USD ($)
Debt Instrument [Line Items]
Percentage of equity interests of material first-tier foreign subsidiaries guaranteed to the line of credit facility			65.00%		65.00%
Senior secured leverage ratio		3.50	3.25		3.25
Debt service coverage ratio			1.00		1.00
Minimum consolidated EBITDA		$ 6,500,000	$ 18,500,000
Commitment fee percentage					0.55%
Cash and cash equivalents			19,611,000		$ 19,611,000			$ 12,175,000
Minimum
Debt Instrument [Line Items]
Commitment fee percentage	0.35%
Maximum
Debt Instrument [Line Items]
Commitment fee percentage	0.55%
Subsequent Event
Debt Instrument [Line Items]
Senior secured leverage ratio				2.75			2.50
Net leverage ratio						4.50	5.50
Debt service coverage ratio				1.25
Minimum consolidated EBITDA				$ 50,500,000
LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate, floor	0.0100
Basis spread on variable rate					4.25%
LIBOR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
LIBOR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	4.25%
Total Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs and debt discount			$ 2,700,000		$ 2,700,000
Senior Secured [Member]
Debt Instrument [Line Items]
Net leverage ratio			2.92		2.92
Credit Facility revolver
Debt Instrument [Line Items]
Borrowing capacity	$ 200,000,000								$ 225,000,000
Standby Letters of Credit
Debt Instrument [Line Items]
Outstanding letters of credit			$ 19,600,000		$ 19,600,000			$ 20,500,000