Name:	res_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognitionTwo
Namespace Prefix:	res_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

This element represents the minimum threshold limit percentage of incentive stock option grants to owners.

No definition available.

Name:	res_MinimumThresholdLimitPercentageOfIncentiveStockOptionGrantsToOwners
Namespace Prefix:	res_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

This element represents the percentage of fair market value of the common stock.

No definition available.

Name:	res_PercentageOfFairMarketValueOfCommonStock
Namespace Prefix:	res_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents percentage of restricted shares issued vest.

No definition available.

Name:	res_PercentageOfRestrictedSharesIssuedVest
Namespace Prefix:	res_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents period of lapse restricted shares issued vest.

No definition available.

Name:	res_PeriodOfLapseRestrictedSharesIssuedVest
Namespace Prefix:	res_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

This element represents the share based compensation arrangement by share based payment award expirations in period.

No definition available.

Name:	res_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationsInPeriod
Namespace Prefix:	res_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

This element represents the share based compensation arrangement by share based payment award expirations in period of majority owner.

No definition available.

Name:	res_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationsInPeriodOfMajorityOwner
Namespace Prefix:	res_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11283-113907

Name:	us-gaap_DeferredTaxExpenseFromStockOptionsExercised
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

No definition available.

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

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 24

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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-Name Accounting Standards Codification

-Topic 718

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-Topic 230

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 718

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Data Type:	xbrli:durationItemType
Balance Type:	na
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- Details

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Value of stock issued as a result of the exercise of stock options.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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-Name Accounting Standards Codification

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-Paragraph 1

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5