Represents loan origination cost net of amortization.

No definition available.

Name:	res_LoanOriginationCostNetOfAmortization
Namespace Prefix:	res_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents maximum consolidated leverage ratio.

+ References

No definition available.

+ Details

Name:	res_MaximumConsolidatedLeverageRatio
Namespace Prefix:	res_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents minimum debt service coverage ratio.

+ References

No definition available.

+ Details

Name:	res_MinimumDebtServiceCoverageRatio
Namespace Prefix:	res_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of minimum EBITDA.

+ References

No definition available.

+ Details

Name:	res_MinimumEbitda
Namespace Prefix:	res_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The lowest amount of net worth (total assets minus total liabilities) required by regulatory mandates.

+ References

No definition available.

+ Details

Name:	res_MinimumTangibleNetWorthCovenantLevel
Namespace Prefix:	res_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of additional credit lenders in addition to Bank of America.

+ References

No definition available.

+ Details

Name:	res_NumberOfAdditionalCreditLenders
Namespace Prefix:	res_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents reduction in commitment fees payable percentage.

+ References

No definition available.

+ Details

Name:	res_ReductionInCommitmentFeesPayablePercentage
Namespace Prefix:	res_
Data Type:	dtr-types:percentItemType
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:	dtr-types:percentItemType
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

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_LineOfCreditFacilityLineItems
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

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=res_AmendmentMember
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:	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_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=res_SwinglineFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt - Credit Facility (Details) $ in Millions			12 Months Ended
Long-Term Debt - Credit Facility (Details) $ in Millions	Sep. 25, 2020 USD ($)	Jul. 26, 2018 USD ($)	Dec. 31, 2021 USD ($) Lender	Dec. 31, 2020 USD ($)	Sep. 24, 2020 USD ($)
Revolving credit facility
Minimum net worth covenant	$ 400.0				$ 600.0
Basis points added	37.50%
Amendment
Revolving credit facility
Maximum consolidated leverage ratio		2.50%
Minimum debt service coverage ratio		2.00%
Revolving credit facility
Revolving credit facility
Number of additional credit lenders \| Lender			5
Maximum borrowing capacity	$ 100.0		$ 100.0		$ 125.0
Minimum EBITDA		$ 50.0
Unamortized origination and other costs			0.2	$ 0.2
Outstanding debt			0.0	$ 0.0
Available credit facility			$ 82.7
Revolving credit facility \| Minimum
Revolving credit facility
Annual fee (as a percent)			0.20%
Revolving credit facility \| Maximum
Revolving credit facility
Annual fee (as a percent)			0.30%
Revolving credit facility \| Eurodollar rate. \| Minimum
Revolving credit facility
Basis points added			1.125%
Revolving credit facility \| Eurodollar rate. \| Maximum
Revolving credit facility
Basis points added			2.125%
Revolving credit facility \| Base Rate \| Minimum
Revolving credit facility
Basis points added			0.125%
Revolving credit facility \| Base Rate \| Maximum
Revolving credit facility
Basis points added			1.125%
Revolving credit facility \| Base Rate \| Federal Funds Rate
Revolving credit facility
Basis points added			0.50%
Revolving credit facility \| Base Rate \| Eurodollar rate.
Revolving credit facility
Basis points added			1.00%
Revolving credit facility \| Amendment
Revolving credit facility
Reduction in commitment fees (in points)	5.00%
Revolving credit facility \| Letter of credit
Revolving credit facility
Maximum borrowing capacity	$ 50.0		$ 35.0
Outstanding debt			17.3
Revolving credit facility \| Letter of credit \| Amendment
Revolving credit facility
Maximum borrowing capacity	$ 400.0
Revolving credit facility \| Swingline
Revolving credit facility
Maximum borrowing capacity			$ 35.0