Consolidated EBITDA to interest expense ratio

No definition available.

Name:	unt_ConsolidatedEBITDAtointerestexpenseratio
Namespace Prefix:	unt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Current ratio of credit facility.

+ References

No definition available.

+ Details

Name:	unt_CurrentRatioOfCreditFacility
Namespace Prefix:	unt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Funded debt to consolidated EBITDA ratio

+ References

No definition available.

+ Details

Name:	unt_FundeddebttoconsolidatedEBITDAratio
Namespace Prefix:	unt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest Coverage Ratio

+ References

No definition available.

+ Details

Name:	unt_InterestCoverageRatio
Namespace Prefix:	unt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Net leverage ratio

+ References

No definition available.

+ Details

Name:	unt_NetLeverageRatio
Namespace Prefix:	unt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- 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

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=unt_SuccessorExitFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_LongTermDebtMaturityAxis=us-gaap_LongTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_EffectivePeriodAxis=unt_September12020ToMarch312021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_EffectivePeriodAxis=unt_April12021ToJune302022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_EffectivePeriodAxis=unt_July12022ToSeptember302022Member
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_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=unt_SuperiorCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- 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:

Long-Term Debt And Other Long-Term Liabilities (Narrative) (Details) - USD ($)		9 Months Ended
	Sep. 03, 2020	Sep. 30, 2021	Oct. 19, 2021	Apr. 21, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt		$ 3,100,000			$ 98,400,000
Exit Credit Agreement
Debt Instrument [Line Items]
Current ratio of credit facility	1.00
Interest Coverage Ratio	2.50
Exit Credit Agreement \| Long-term Debt
Debt Instrument [Line Items]
Long-term debt		0			$ 98,400,000
Exit Credit Agreement \| September 1, 2020 to March 31, 2021 [Member]
Debt Instrument [Line Items]
Net leverage ratio	4.00
Exit Credit Agreement \| April 1, 2021 to June 30, 2022 [Member]
Debt Instrument [Line Items]
Net leverage ratio	3.75
Exit Credit Agreement \| July 1, 2022 to September 30, 2022 [Member]
Debt Instrument [Line Items]
Net leverage ratio	3.25
Exit Credit Agreement \| Revolving Credit Facility [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	5.25%
Exit Credit Agreement \| Revolving Credit Facility [Member] \| Alternate Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	4.25%
Exit Credit Agreement \| Term loan [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	6.25%
Exit Credit Agreement \| Term loan [Member] \| Alternate Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	5.25%
Exit Credit Agreement \| Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		3,200,000
Exit Credit Agreement \| Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Mar. 01, 2024
Exit Credit Agreement \| Secured Debt [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum credit amount	$ 140,000,000			$ 140,000,000
Exit Credit Agreement \| Secured Debt [Member] \| Revolving Credit Facility [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Credit facility maximum credit amount			$ 80,000,000
Exit Credit Agreement \| Secured Debt [Member] \| Term loan [Member]
Debt Instrument [Line Items]
Credit facility maximum credit amount	$ 40,000,000
Superior Credit Agreement
Debt Instrument [Line Items]
Credit facility maximum credit amount		$ 250,000,000
Superior Credit Agreement, Term		5 years
Credit facility current credit amount		$ 200,000,000
Superior Credit Agreement, Interest Rate Description		annual interest at a rate, at Superior’s option, equal to (a) LIBOR plus the applicable margin of 2.00% to 3.25% or (b) the alternate base rate (greater of (i) the federal funds rate plus 0.5%, (ii) the prime rate, and (iii) the Thirty-Day LIBOR Rate (as defined in the Superior credit agreement)) plus the applicable margin of 1.00% to 2.25%.
Commitment fee percentage under credit facility		0.375%
Superior Credit Agreement \| Long-term Debt
Debt Instrument [Line Items]
Long-term debt		$ 3,100,000
Superior Credit Agreement \| Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$ 1,400,000
Superior Credit Agreement \| Minimum
Debt Instrument [Line Items]
Consolidated EBITDA to interest expense ratio		2.50 to 1.00
Superior Credit Agreement \| Maximum
Debt Instrument [Line Items]
Funded debt to consolidated EBITDA ratio		4.00 to 1.00