XML 58 R48.htm IDEA: XBRL DOCUMENT v3.22.1

Note 9 - Long-term Debt (Details Textual) - USD ($) $ in Millions							6 Months Ended
	Oct. 01, 2022	Apr. 01, 2022	Nov. 01, 2021	Sep. 24, 2021	Aug. 20, 2021	Mar. 31, 2021	Mar. 31, 2022	Oct. 31, 2021
Debt Instruments, Overall Maximum Borrowing Capacity			$ 33				$ 23	$ 41
Debt Instrument, Debt Covenant Ratio of Long-term Debt to Total Capitalization, Maximum							65.00%
Debt Instrument, Debt Covenant, Ratio of Priority Debt to Total Assets, Maximum							15.00%
Debt Instrument, Debt Covenant, Interest Coverage Ratio							1.5
Unsecured Promissory Note with 30 Day LIBOR Plus 1.15 Basis Points Maturing January 1, 2028 [Member] | RGC Midstream LLC [Member]
Debt Instrument, Face Amount			$ 8
Derivative, Fixed Interest Rate			2.443%
Unsecured Promissory Note with 30 Day LIBOR Plus 1.15 Basis Points Maturing January 1, 2028 [Member] | RGC Midstream LLC [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			1.15%
Cash Infusion Proceeds Utilized to Repay Non-revolving Credit Facility [Member]
Repayments of Debt						$ 10
Unsecured Term Notes Payable, at 30-day LIBOR Plus 100 Basis Points, Due October 1, 2028 [Member]
Debt Instrument, Face Amount				$ 10
Unsecured Term Notes Payable, at 30-day LIBOR Plus 100 Basis Points, Due October 1, 2028 [Member] | Roanoke Gas Company [Member]
Debt Instrument, Face Amount				$ 10
Unsecured Term Notes Payable, at 30-day LIBOR Plus 100 Basis Points, Due October 1, 2028 [Member] | Roanoke Gas Company [Member] | Interest Rate Swap [Member]
Derivative, Fixed Interest Rate				2.49%
Derivative, Notional Amount				$ 10
Unsecured Term Notes Payable, at 30-day LIBOR Plus 100 Basis Points, Due October 1, 2028 [Member] | Roanoke Gas Company [Member] | Forecast [Member]
Proceeds from Issuance of Long-term Debt, Total	$ 5	$ 5
Unsecured Term Notes Payable, at 30-day LIBOR Plus 100 Basis Points, Due October 1, 2028 [Member] | Roanoke Gas Company [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate				1.00%
Unsecured Term Notes Payable, at 30-day SOFR Average 1.20% Due August 20, 2026 [Member]
Debt Instrument, Face Amount					$ 15
Unsecured Term Notes Payable, at 30-day SOFR Average 1.20% Due August 20, 2026 [Member] | Roanoke Gas Company [Member]
Debt Instrument, Face Amount					$ 15
Unsecured Term Notes Payable, at 30-day SOFR Average 1.20% Due August 20, 2026 [Member] | Roanoke Gas Company [Member] | Interest Rate Swap [Member]
Derivative, Fixed Interest Rate					2.00%
Derivative, Notional Amount					$ 15
Unsecured Term Notes Payable, at 30-day SOFR Average 1.20% Due August 20, 2026 [Member] | Roanoke Gas Company [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate					1.20%

X

- Definition

Represents the interest coverage ratio requirement.

+ References

No definition available.

+ Details

Name:	rgco_DebtInstrumentDebtCovenantInterestCoverageRatio
Namespace Prefix:	rgco_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum debt covenant ratio of long-term debt to total capitalization of a debt instrument.

+ References

No definition available.

+ Details

Name:	rgco_DebtInstrumentDebtCovenantRatioOfLongtermDebtToTotalCapitalizationMaximum
Namespace Prefix:	rgco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum debt covenant ratio of priority debt to total assets of a debt instrument.

+ References

No definition available.

+ Details

Name:	rgco_DebtInstrumentDebtCovenantRatioOfPriorityDebtToTotalAssetsMaximum
Namespace Prefix:	rgco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum amount of borrowings allowed for total debt instruments.

+ References

No definition available.

+ Details

Name:	rgco_DebtInstrumentsOverallMaximumBorrowingCapacity
Namespace Prefix:	rgco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=rgco_UnsecuredPromissoryNoteWith30DayLiborPlus115BasisPointsMaturingJanuary12028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rgco_RGCMidstreamLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=rgco_CashInfusionProceedsUtilizedToRepayNonrevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=rgco_UnsecuredTermNotesPayableAt30dayLiborPlus100BasisPointsDueOctober12028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rgco_RoanokeGasCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=rgco_UnsecuredTermNotesPayableAt30daySOFRAverage120DueAugust202026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: