Derivatives (Schedule of Non-designated Hedges Outstanding) (Details)	9 Months Ended
Sep. 30, 2015 MMBTU $ / Unit bbl
Swap [Member] \| Oct'15 - Dec'15 [Member] \| Crude Oil [Member] \| WTI - NYMEX [Member]
Derivative [Line Items]
Hedged Volume (Bbl/day) \| bbl	1,000
Weighted Average Swap Price	95.00
Swap [Member] \| Oct'15 - Dec'15 [Member] \| Natural Gas [Member] \| NYMEX (HH) [Member]
Derivative [Line Items]
Hedged Volume (MMBtu/day) \| MMBTU	40,000
Weighted Average Swap Price	3.98
Swap [Member] \| Jan'16 - Dec'16 [Member] \| Natural Gas [Member] \| NYMEX (HH) [Member]
Derivative [Line Items]
Hedged Volume (MMBtu/day) \| MMBTU	10,000
Weighted Average Swap Price	3.25
Collar [Member] \| Oct'15 - Dec'15 [Member] \| Crude Oil [Member] \| WTI - NYMEX [Member]
Derivative [Line Items]
Hedged Volume (Bbl/day) \| bbl	2,000
Floor Price	58.00
Ceiling Price	64.40
Three-Way Collar [Member] \| Nov'15 - Dec'16 [Member] \| Natural Gas [Member] \| NYMEX (HH) [Member]
Derivative [Line Items]
Hedged Volume (MMBtu/day) \| MMBTU	13,500
Subfloor Price	2.20
Floor Price	2.70
Ceiling Price	3.26

Not Designated as Hedging Instrument Hedged Volume of Natural Gas

No definition available.

Name:	unt_NotDesignatedasHedgingInstrumentHedgedVolumeofNaturalGas
Namespace Prefix:	unt_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Not Designated as Hedging Instrument Hedged Volume of Oil

+ References

No definition available.

+ Details

Name:	unt_NotDesignatedasHedgingInstrumentHedgedVolumeofOil
Namespace Prefix:	unt_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapPrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

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

- Definition

The strike price on the price risk option contract such as a put option or a call option.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativePriceRiskOptionStrikePrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_ReportDateAxis=unt_OctoberTwoThousandFifteentoDecemberTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TradingActivityByTypeAxis=us-gaap_CrudeOilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_ExchangeAxis=unt_WtiNymexMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TradingActivityByTypeAxis=us-gaap_NaturalGasReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_ExchangeAxis=unt_NYMEXMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_ReportDateAxis=unt_JanuaryTwoThousandSixteentoDecemberTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=unt_CollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=unt_ThreeWayCollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	unt_ReportDateAxis=unt_NovemberTwoThousandFifteentoDecemberTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: