2.2.0.7 true Condensed Consolidated Statements of Cash Flows (USD $) 00400 - Statement - Condensed Consolidated Statements of Cash Flows true false In Thousands false false 1 USD true false false false Successor [Member] us-gaap_StatementScenarioAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SuccessorMember us-gaap_StatementScenarioAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD true false false false Predecessor [Member] us-gaap_StatementScenarioAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PredecessorMember us-gaap_StatementScenarioAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD true false false false Predecessor [Member] us-gaap_StatementScenarioAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PredecessorMember us-gaap_StatementScenarioAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit13 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 5 OPERATING ACTIVITIES 3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income. false 6 Net (loss) income 4 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 true true false false -4895000 -4895 true false false 2 true true false false -4946000 -4946 true false false 3 true true false false 154379000 154379 true false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 7 Adjustments to reconcile net (loss) income to net cash flows provided by (used in) operating activities: 4 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 8 Depreciation and amortization, including debt issuance cost amortization 5 us-gaap_DepreciationAmortizationAndAccretionNet us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 11330000 11330 true false false 2 false true false false 49363000 49363 true false false 3 false true false false 56750000 56750 true false false xbrli:monetaryItemType monetary The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by (used in) operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 9 Write-off of debt issuance costs 5 rgnc_WriteOffOfDeferredFinancingCosts rgnc false debit duration The expensing of deferred financing costs associated with long-term debt that was extinguished prior to its original... false false false false false false false false false false false terselabel false 1 false false false false 0 0 true false false 2 false true false false 1780000 1780 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The expensing of deferred financing costs associated with long-term debt that was extinguished prior to its original maturity. No authoritative reference available. false 10 Income from unconsolidated subsidiaries 5 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -8121000 -8121 true false false 2 false true false false -15872000 -15872 true false false 3 false true false false -1923000 -1923 true false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b false 11 Derivative valuation changes 5 us-gaap_UnrealizedGainLossOnDerivatives us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 6921000 6921 true false false 2 false true false false 12004000 12004 true false false 3 false true false false -6293000 -6293 true false false xbrli:monetaryItemType monetary The increases (decreases) in the market value of derivative instruments, including options, swaps, futures, and forward contracts, which were included in earnings in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 12 Loss (gain) on asset sales, net 5 us-gaap_GainLossOnSaleOfPropertyPlantEquipment us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 10000 10 true false false 2 false true false false 303000 303 true false false 3 false true false false -133280000 -133280 true false false xbrli:monetaryItemType monetary The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 13 Unit-based compensation expenses 5 us-gaap_ShareBasedCompensation us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 137000 137 true false false 2 false true false false 12070000 12070 true false false 3 false true false false 2750000 2750 true false false xbrli:monetaryItemType monetary The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 14 Cash flow changes in current assets and liabilities: 4 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 15 Trade accounts receivable, accrued revenues, and related party receivables 5 us-gaap_IncreaseDecreaseInAccountsReceivable us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 13843000 13843 true false false 2 false true false false -11272000 -11272 true false false 3 false true false false 38073000 38073 true false false xbrli:monetaryItemType monetary The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 16 Other current assets 5 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 585000 585 true false false 2 false true false false 2516000 2516 true false false 3 false true false false 3728000 3728 true false false xbrli:monetaryItemType monetary The net change during the reporting period in other operating assets not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 17 Trade accounts payable, accrued cost of gas and liquids, related party payables and deferred revenues 5 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false -15460000 -15460 true false false 2 false true false false 8649000 8649 true false false 3 false true false false -39185000 -39185 true false false xbrli:monetaryItemType monetary The net change during the reporting period in the aggregate amount of obligations and expenses incurred but not paid. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 18 Other current liabilities 5 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -20497000 -20497 true false false 2 false true false false 22614000 22614 true false false 3 false true false false -7396000 -7396 true false false xbrli:monetaryItemType monetary The net change during the reporting period in other operating obligations not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 19 Distributions received from unconsolidated subsidiaries 4 us-gaap_EquityMethodInvestmentDividendsOrDistributions us-gaap true debit duration No definition available. false false false false false false false false false false false label false 1 false false false false 0 0 true false false 2 false true false false 12446000 12446 true false false 3 false true false false 1900000 1900 true false false xbrli:monetaryItemType monetary This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 false 20 Other assets and liabilities 4 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -60000 -60 true false false 2 false true false false -234000 -234 true false false 3 false true false false -232000 -232 true false false xbrli:monetaryItemType monetary For entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 false 21 Net cash flows (used in) provided by operating activities 4 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false -16207000 -16207 true false false 2 false true false false 89421000 89421 true false false 3 false true false false 69271000 69271 true false false xbrli:monetaryItemType monetary The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 22 INVESTING ACTIVITIES 3 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 23 Capital expenditures 4 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -20875000 -20875 true false false 2 false true false false -63787000 -63787 true false false 3 false true false false -119185000 -119185 true false false xbrli:monetaryItemType monetary The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c false 24 Capital contribution to unconsolidated subsidiaries 4 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -38922000 -38922 true false false 2 false true false false -20210000 -20210 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph b false 25 Acquisitions, net of cash received 4 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 12848000 12848 true false false 2 false true false false -75114000 -75114 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 false 26 Proceeds from asset sales 4 us-gaap_ProceedsFromSaleOfProductiveAssets us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 14000 14 true false false 2 false true false false 10661000 10661 true false false 3 false true false false 83182000 83182 true false false xbrli:monetaryItemType monetary The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c false 27 Net cash flows (used in) investing activities 4 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false -46935000 -46935 true false false 2 false true false false -148450000 -148450 true false false 3 false true false false -36003000 -36003 true false false xbrli:monetaryItemType monetary The net cash inflow (outflow) from investing activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 28 FINANCING ACTIVITIES 3 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 29 Net borrowings (repayments) under revolving credit facility 4 us-gaap_ProceedsFromRepaymentsOfSecuredDebt us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 37000000 37000 true false false 2 false true false false 199008000 199008 true false false 3 false true false false -177249000 -177249 true false false xbrli:monetaryItemType monetary The net cash inflow (outflow) from the aggregate amount of collateralized debt (where debt is backed by the pledge of collateral, a mortgage or other lien). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 false 30 Proceeds from issuance of senior notes, net of discount 4 us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false true false false 236240000 236240 true false false xbrli:monetaryItemType monetary The cash inflow from other borrowings not otherwise defined in the taxonomy (with maturities initially due beyond one year or the normal operating cycle of the entity, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b false 31 Debt issuance costs 4 us-gaap_PaymentsOfDebtIssuanceCosts us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -132000 -132 true false false 2 false true false false -15728000 -15728 true false false 3 false true false false -11939000 -11939 true false false xbrli:monetaryItemType monetary The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-13 false 32 Partner contributions 4 us-gaap_ProceedsFromPartnershipContribution us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 7436000 7436 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash inflow from the capital received in cash from a partner in a partnership during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 false 33 Partner distributions 4 us-gaap_PaymentsOfDistributionsToAffiliates us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false true false false -86078000 -86078 true false false 3 false true false false -71644000 -71644 true false false xbrli:monetaryItemType monetary The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 34 Acquisition of assets between entities under common control in excess of historical cost 4 rgnc_AcquisitionOfAssetsUnderCommonControl rgnc false debit duration Amounts paid to acquire assets controlled by the same entity that controls the registrant, in excess of the controlling... false false false false false false false false false false false terselabel false 1 false false false false 0 0 true false false 2 false true false false -16973000 -16973 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary Amounts paid to acquire assets controlled by the same entity that controls the registrant, in excess of the controlling entity's carrying value. No authoritative reference available. false 35 Distributions to noncontrolling interest 4 us-gaap_PaymentsToMinorityShareholders us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false true false false -1135000 -1135 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow to return capital to noncontrolled interest, which generally occurs when noncontrolling shareholders reduce their ownership stake (in a subsidiary of the entity). This element does not include dividends paid to noncontrolling shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 36 Proceeds from option exercises 4 us-gaap_ProceedsFromStockOptionsExercised us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 150000 150 true false false 2 false true false false 120000 120 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash inflow associated with the amount received from holders exercising their stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a false 37 Equity issuance costs 4 us-gaap_PaymentsOfStockIssuanceCosts us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false true false false -89000 -89 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 false 38 Distributions to redeemable convertible preferred units 4 us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock us-gaap true credit duration No definition available. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false true false false -1945000 -1945 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow for the return on capital for preferred shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 39 Tax withholding on unit-based vesting 4 rgnc_PaymentForTaxWithholdingRelatedToVestedAndReleasedRestrictedStockUnits rgnc false credit duration The cash outflow associated with tax withholding obligations upon release of vested restricted stock units. false false false false false false false false false false true negated false 1 false false false false 0 0 true false false 2 false true false false -4994000 -4994 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow associated with tax withholding obligations upon release of vested restricted stock units. No authoritative reference available. false 40 Net cash flows provided by (used in) financing activities 4 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 44454000 44454 true false false 2 false true false false 72186000 72186 true false false 3 false true false false -24592000 -24592 true false false xbrli:monetaryItemType monetary The net cash inflow (outflow) from financing activity for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 41 Net change in cash and cash equivalents 3 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false -18688000 -18688 true false false 2 false true false false 13157000 13157 true false false 3 false true false false 8676000 8676 true false false xbrli:monetaryItemType monetary The net change between the beginning and ending balance of cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 true 42 Cash and cash equivalents at beginning of period 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 22984000 22984 true false false 2 false true false false 9827000 9827 true false false 3 false true false false 599000 599 true false false xbrli:monetaryItemType monetary Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 false 43 Cash and cash equivalents at end of period 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant No definition available. false false false false false false false false false true false periodendlabel false 1 false true false false 4296000 4296 true false false 2 false true false false 22984000 22984 true false false 3 false true false false 9275000 9275 true false false xbrli:monetaryItemType monetary Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 false 44 Supplemental cash flow information: 3 us-gaap_SupplementalCashFlowInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:stringItemType string No definition available. false 45 Non-cash capital expenditures 4 us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 16159000 16159 true false false 2 false true false false 18051000 18051 true false false 3 false true false false 9480000 9480 true false false xbrli:monetaryItemType monetary Future cash outflow to pay for construction in progress expenditures that have occurred. No authoritative reference available. false 46 Issuance of common units for an acquisition 4 us-gaap_StockIssued us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 584436000 584436 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The fair value of stock issued in noncash financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 false 47 Deemed contribution from acquisition of assets between entities under common control 4 rgnc_DeemedContributionFromAcquisition rgnc false credit duration The excess of the carrying value of assets acquired from the entity controlling the registrant over the fair value of the... false false false false false false false false false false false terselabel false 1 false true false false 17152000 17152 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary The excess of the carrying value of assets acquired from the entity controlling the registrant over the fair value of the consideration paid. No authoritative reference available. false 48 Release of escrow payable from restricted cash 4 us-gaap_EscrowDepositDisbursementsRelatedToPropertyAcquisition us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 true false false 2 false true false false 500000 500 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary Escrow deposit disbursements related to property acquisition in noncash investing or financing transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 false 49 Contribution of fixed assets, goodwill and working capital to HPC 4 us-gaap_ContributionOfProperty us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false true false false 263921000 263921 true false false xbrli:monetaryItemType monetary Value of property contributed in noncash investing and financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 false 50 Contribution receivable 4 rgnc_ContributionReceivable rgnc false debit duration Contribution receivable false false false false false false false false false false false label false 1 true true false false 12288000 12288 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false xbrli:monetaryItemType monetary Contribution receivable No authoritative reference available. false 3 46 false Thousands UnKnown UnKnown false true