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Organization And Summary Of Significant Accounting Policies Narrative (Details) (Pending Merger with ETP [Member])
1 Months Ended
Apr. 30, 2015
Pending Merger with ETP [Member]
 
Number of Share Received in Exchange of Each Share 0.4124rgp_NumberofShareReceivedinExchangeofEachShare
/ us-gaap_StatementScenarioAxis
= rgp_MergerwithETPMember
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 172,200,000us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_StatementScenarioAxis
= rgp_MergerwithETPMember
Business Acquisition, Equity Interest Issued to a Subsidiary, Number of Shares 15,500,000rgp_BusinessAcquisitionEquityInterestIssuedtoaSubsidiaryNumberofShares
/ us-gaap_StatementScenarioAxis
= rgp_MergerwithETPMember