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PROPERTY, PLANT AND EQUIPMENT (Detail Textuals) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Property, Plant and Equipment [Abstract] |  |  |
Increase in cost of revenues | $ 7.9 res_IncreaseInCostOfRevenues |  |
Loss on disposition of components |  | 4.4 us-gaap_GainLossOnSaleOfPropertyPlantEquipment |
Remaining net book value of components in service |  |  | $ 16.4 res_RemainingNetBookValueOfComponents
Estimated weighted average remaining useful life |  |  | 12 months

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- Definition Represents the information about increase in the cost of revenues. + References No definition available. + Details
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Namespace Prefix: | res_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the information about remaining net book value of these components. + References No definition available. + Details
Name: | res_RemainingNetBookValueOfComponents
Namespace Prefix: | res_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration