XML 74 R62.htm IDEA: XBRL DOCUMENT v3.19.2

Long-Term Debt and Bank Facility Borrowings - Additional Information (Detail) - USD ($)

Jul. 02, 2018

Jun. 30, 2019

Sep. 30, 2018

Debt Instrument [Line Items]

Hedging positions and payable amounts secured under credit facility

$ 3,400,000

$ 0

Letters of credit issued and outstanding

7,000,000

7,100,000

Long-term debt, fair value

^[1]

165,500,000

101,500,000

Revolving credit facility outstanding

70,500,000

1,500,000

Availability in compliance with the fixed charge coverage ratio

147,400,000

189,000,000

Term Loan

Debt Instrument [Line Items]

Long-term debt, fair value

^[1],[2]

95,000,000

100,000,000

Revolving Credit Facility

Debt Instrument [Line Items]

Revolving credit facility outstanding

$ 70,500,000

$ 1,500,000

Fourth Amendment

Debt Instrument [Line Items]

Non Seasonal maximum borrowing capacity under revolving credit facility

$ 300,000,000

Maximum borrowing capacity (heating season December to April) under revolving credit facility

450,000,000

Issuance of line of credit for working capital purposes

$ 25,000,000

Revolving credit facility expiry

Jul. 02, 2023

Facility size that can be increased without consulting bank group

$ 200,000,000

Term loan annual payment percentage

25.00%

Debt instrument, effective interest rate

5.90%

5.20%

Commitment fee on the unused portion of the facility from December through April

0.30%

Commitment fee on the unused portion of the facility from May through November

0.20%

Minimum fixed charge coverage ratio

110.00%

Availability percentage to maximum facility size

12.50%

Fourth Amendment | Maximum

Debt Instrument [Line Items]

Senior secured leverage ratio during quarters ending June or September

300.00%

Senior secured leverage ratio during quarters ending December or March

450.00%

Fourth Amendment | Quarterly

Debt Instrument [Line Items]

Term loan periodic payment

$ 2,500,000

Fourth Amendment | Annually | Maximum

Debt Instrument [Line Items]

Term loan periodic payment

15,000,000

Fourth Amendment | Term Loan

Debt Instrument [Line Items]

Outstanding term loan

$ 100,000,000

Senior secured term loan maturity period

5 years

Fourth Amendment | Revolving Credit Facility

Debt Instrument [Line Items]

Debt instrument, effective interest rate

4.50%

3.80%

[1]	The face amount of the Company’s variable rate long-term debt approximates fair value.
[2]	Carrying amounts are net of unamortized debt issuance costs of $0.6 million as of June 30, 2019 and $0.7 million as of September 30, 2018.

X

- Definition

Additional annual payment to term loan facility, percentage of excess cash flow.

+ References

No definition available.

+ Details

Name:	sgu_AdditionalAnnualPaymentToTermLoanFacilityPercentageOfExcessCashFlow
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Availability in compliance with the fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	sgu_AvailabilityInComplianceWithFixedChargeCoverageRatio
Namespace Prefix:	sgu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Availability percentage to maximum facility size.

+ References

No definition available.

+ Details

Name:	sgu_AvailabilityPercentageToMaximumFacilitySize
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt instrument leverage ratio period one.

+ References

No definition available.

+ Details

Name:	sgu_DebtInstrumentLeverageRatioPeriodOne
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt instrument leverage ratio period two.

+ References

No definition available.

+ Details

Name:	sgu_DebtInstrumentLeverageRatioPeriodTwo
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line of credit facility additional borrowing capacity for working capital needs.

+ References

No definition available.

+ Details

Name:	sgu_LineOfCreditFacilityAdditionalBorrowingCapacityForWorkingCapitalNeeds
Namespace Prefix:	sgu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line of credit facility maximum borrowing capacity during the heating season.

+ References

No definition available.

+ Details

Name:	sgu_LineOfCreditFacilityMaximumBorrowingCapacityDuringHeatingSeason
Namespace Prefix:	sgu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line of credit facility unused capacity commitment fee percentage period one.

+ References

No definition available.

+ Details

Name:	sgu_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentagePeriodOne
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line of credit facility unused capacity commitment fee percentage period two.

+ References

No definition available.

+ Details

Name:	sgu_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentagePeriodTwo
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum increase allowed without bank consulting.

+ References

No definition available.

+ Details

Name:	sgu_MaximumIncreaseAllowedWithoutBankConsulting
Namespace Prefix:	sgu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Minimum fixed charge coverage ratio on revolving credit facilities.

+ References

No definition available.

+ Details

Name:	sgu_MinimumFixedChargeCoverageRatioOnRevolvingCreditFacilities
Namespace Prefix:	sgu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

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 http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

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

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

X

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

X

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_CreditFacilityAxis=sgu_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sgu_FourthAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sgu_QuarterlyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=sgu_AnnuallyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: