COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	3 Months Ended
Sep. 30, 2021 USD ($)
COMMITMENTS AND CONTINGENCIES
Estimated liability included in balance sheet	$ 4.5
Estimated liability included in income statement	$ 3.3

Amount of estimated liability to reflect the resolution of long term contractual dispute with a vendor included in income statement.

No definition available.

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