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NOTES PAYABLE TO BANKS (Detail Textuals) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015
Line of Credit Facility [Line Items] |
Amount of credit facility | $ 350 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Percentage of ownership | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent
Term of line of credit facility | 5 years
Loan origination fees and other debt related costs | 3.0 res_LoanOriginationFeesAndOtherDebtRelatedCosts
Non-current other assets net | 1.1 res_NonCurrentOtherAssetsNet
Description of variable rate basis of debt instrument | Revolving loans under the Revolving Credit Agreement bear interest at one of the following two rates, at the Company’s election:
| ● | the Base Rate, which is the highest of Bank of America’s “prime rate” for the day of the borrowing, a fluctuating rate per annum equal to the Federal Funds Rate plus 0.50%, and a rate per annum equal to the one (1) month LIBOR rate plus 1.00%; in each case plus a margin that ranges from 0.125% to 1.125% based on a quarterly debt covenant calculation; or
| ● | with respect to any Eurodollar borrowings, Adjusted LIBOR (which equals LIBOR as increased to account for the maximum reserve percentages established by the U.S. Federal Reserve) plus a margin ranging from 1.125% to 2.125%, based upon a quarterly debt covenant calculation.
Revolving credit facility | Minimum |
Line of Credit Facility [Line Items] |
Fees on unused portion of facility | 0.225%res_MarginOnUnusedCreditFacilityPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Revolving credit facility | Maximum |
Line of Credit Facility [Line Items] |
Fees on unused portion of facility | 0.325%res_MarginOnUnusedCreditFacilityPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Revolving credit facility | Option 1 A |
Line of Credit Facility [Line Items] |
Basis spread on variable rate | 0.50%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1Member
Description of reference rate basis | Federal Funds Rate
Revolving credit facility | Option 1 A | Minimum |
Line of Credit Facility [Line Items] |
Range of margin based on quarterly debt covenant calculation | 0.125%res_LineOfCreditFacilityMarginPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1Member / us-gaap_RangeAxis = us-gaap_MinimumMember
Revolving credit facility | Option 1 A | Maximum |
Line of Credit Facility [Line Items] |
Range of margin based on quarterly debt covenant calculation | 1.125%res_LineOfCreditFacilityMarginPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1Member / us-gaap_RangeAxis = us-gaap_MaximumMember
Revolving credit facility | Option 1 B |
Line of Credit Facility [Line Items] |
Basis spread on variable rate | 1.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1BMember
Description of reference rate basis | LIBOR rate
Revolving credit facility | Option 1 B | Minimum |
Line of Credit Facility [Line Items] |
Range of margin based on quarterly debt covenant calculation | 0.125%res_LineOfCreditFacilityMarginPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1BMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Revolving credit facility | Option 1 B | Maximum |
Line of Credit Facility [Line Items] |
Range of margin based on quarterly debt covenant calculation | 1.125%res_LineOfCreditFacilityMarginPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / res_OptionAxis = res_Option1BMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Letter of credit subfacility |
Line of Credit Facility [Line Items] |
Amount of credit facility | 50 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember
Swingline subfacility |
Line of Credit Facility [Line Items] |
Amount of credit facility | $ 35 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = res_LetterOfCreditSwinglineSubfacilityMember

X
- Definition Represents as percentage range of line of credit facility minimum based on quarterly debt covenant calculation. + References No definition available. + Details
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Namespace Prefix: | res_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of loan origination fees and other debt related costs. + References No definition available. + Details
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Namespace Prefix: | res_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of unused portion of the credit facility. + References No definition available. + Details
Name: | res_MarginOnUnusedCreditFacilityPercentage
Namespace Prefix: | res_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the net amount of non-current other assets. + References No definition available. + Details
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Namespace Prefix: | res_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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X
- 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
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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X
- 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Details
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- 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://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | na
Period Type: | instant

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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Balance Type: | na
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- Details
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- Details
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- Details
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Period Type: |