XML 99 R82.htm IDEA: XBRL DOCUMENT
v3.20.2

Income Taxes - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 01, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2020 | Sep. 30, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax asset |  | $ 47,806,000 |  |  |  | $ 17,262,000 |  |  |  |  | $ 47,806,000 |  | $ 47,806,000 | $ 17,262,000 |
Tax Cuts and Jobs Act, percentage of depreciation for certain fixed assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Tax Cuts and Jobs Act, change in tax rate, discrete tax benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,101,000
Federal statutory tax rate |  |  |  |  |  |  |  |  |  | 35.00% |  | 21.00% | 21.00% | 21.00% |
Income from continuing operations before taxes |  | (44,051,000) | $ (2,051,000) | $ 83,108,000 | $ 39,537,000 | $ (46,545,000) | $ (33,153,000) | $ 101,564,000 | $ 3,288,000 | $ 28,700,000 |  | $ 34,400,000 | $ 76,543,000 | $ 25,154,000 | $ 63,107,000
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change in valuation allowance |  |  |  |  |  |  |  |  |  |  |  |  | (100,000) | $ 100,000 |
Unrecognized income tax benefits |  | 0 |  |  |  |  |  |  |  |  | 0 |  | $ 0 |  |
Federal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for examination |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |
Federal | Tax Year 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate income tax rate |  |  |  |  |  |  |  |  |  | 35.00% |  |  |  |  |
Federal | Tax Year 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate income tax rate |  |  |  |  |  |  |  |  |  |  |  |  | 21.00% |  |
State |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating loss carry forwards | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
State | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration date of net operating loss carryforward | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
State | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration date of net operating loss carryforward | Dec. 31, 2037 |  |  |  |  |  |  |  |  |  |  |  |  |  |
New York |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for examination |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |
Connecticut |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for examination |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |
Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for examination |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |
New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for examination |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
CARES Act |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferral payment of social security taxes |  |  |  |  |  |  |  |  |  |  | 6,500,000 |  |  |  |
Deferred tax asset |  | $ 900,000 |  |  |  |  |  |  |  |  | $ 900,000 |  | $ 900,000 |  |

X
- Definition Corporate income tax rate. + References No definition available. + Details
Name: | sgu_CorporateIncomeTaxRate
Namespace Prefix: | sgu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferral payment of social security taxes. + References No definition available. + Details
Name: | sgu_DeferralPaymentOfSocialSecurityTaxes
Namespace Prefix: | sgu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Income Tax Disclosure [Line Items] + References No definition available. + Details
Name: | sgu_IncomeTaxDisclosureLineItems
Namespace Prefix: | sgu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income tax examination, years open for examination. + References No definition available. + Details
Name: | sgu_IncomeTaxExaminationYearsOpenForExamination
Namespace Prefix: | sgu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Cuts and Jobs Act, percentage of depreciation for fixed assets. + References No definition available. + Details
Name: | sgu_TaxCutsAndJobsActPercentageOfDepreciationForFixedAssets
Namespace Prefix: | sgu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwardsExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
Name: | us-gaap_TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=sgu_FederalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=us-gaap_TaxYear2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
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_IncomeTaxAuthorityAxis=stpr_NY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=stpr_CT
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=stpr_PA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=stpr_NJ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationContingencyAxis=sgu_CoronavirusAidReliefAndEconomicSecurityActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |