3.26.1 html 269 293 1 true 81 0 false 9 false false R1.htm 75000 - Document - Document and Entity Information Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 75010 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDBALANCESHEETS CONDENSED CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 75020 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 75030 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Statements 4 false false R5.htm 75050 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statements 5 false false R6.htm 75060 - Statement - CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDSTATEMENTOFPARTNERSCAPITAL CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL Statements 6 false false R7.htm 75070 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_StatementCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 7 false false R8.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 8 false false R9.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 9 false false R10.htm 995455 - Disclosure - Organization Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureOrganization Organization Notes 10 false false R11.htm 995465 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 11 false false R12.htm 995475 - Disclosure - Revenue Recognition Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognition Revenue Recognition Notes 12 false false R13.htm 995485 - Disclosure - Common Unit Repurchase and Retirement Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirement Common Unit Repurchase and Retirement Notes 13 false false R14.htm 995495 - Disclosure - Captive Insurance Collateral Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCaptiveInsuranceCollateral Captive Insurance Collateral Notes 14 false false R15.htm 995505 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurements Derivatives and Hedging-Disclosures and Fair Value Measurements Notes 15 false false R16.htm 995515 - Disclosure - Inventories Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureInventories Inventories Notes 16 false false R17.htm 995525 - Disclosure - Property and Equipment Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosurePropertyAndEquipment Property and Equipment Notes 17 false false R18.htm 995535 - Disclosure - Business Combinations and Divestitures Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureBusinessCombinationsAndDivestitures Business Combinations and Divestitures Notes 18 false false R19.htm 995545 - Disclosure - Goodwill and Intangible Assets, net Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet Goodwill and Intangible Assets, net Notes 19 false false R20.htm 995555 - Disclosure - Long-Term Debt and Bank Facility Borrowings Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowings Long-Term Debt and Bank Facility Borrowings Notes 20 false false R21.htm 995565 - Disclosure - Income Taxes Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureIncomeTaxes Income Taxes Notes 21 false false R22.htm 995575 - Disclosure - Supplemental Disclosure of Cash Flow Information Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSupplementalDisclosureOfCashFlowInformation Supplemental Disclosure of Cash Flow Information Notes 22 false false R23.htm 995585 - Disclosure - Commitments and Contingencies Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 23 false false R24.htm 995595 - Disclosure - Earnings Per Limited Partner Unit Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureEarningsPerLimitedPartnerUnit Earnings Per Limited Partner Unit Notes 24 false false R25.htm 995605 - Disclosure - Segment Reporting Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureSegmentReporting Segment Reporting Notes 25 false false R26.htm 995615 - Disclosure - Subsequent Events Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSubsequentEvents Subsequent Events Notes 26 false false R27.htm 995625 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies 27 false false R28.htm 995635 - Disclosure - Revenue Recognition (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognition 28 false false R29.htm 995645 - Disclosure - Common Unit Repurchase and Retirement (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirementTables Common Unit Repurchase and Retirement (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirement 29 false false R30.htm 995655 - Disclosure - Captive Insurance Collateral (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCaptiveInsuranceCollateralTables Captive Insurance Collateral (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCaptiveInsuranceCollateral 30 false false R31.htm 995665 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurementsTables Derivatives and Hedging-Disclosures and Fair Value Measurements (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurements 31 false false R32.htm 995675 - Disclosure - Inventories (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureInventoriesTables Inventories (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureInventories 32 false false R33.htm 995685 - Disclosure - Property and Equipment (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosurePropertyAndEquipment 33 false false R34.htm 995695 - Disclosure - Goodwill and Intangible Assets, net (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetTables Goodwill and Intangible Assets, net (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet 34 false false R35.htm 995705 - Disclosure - Long-Term Debt and Bank Facility Borrowings (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowingsTables Long-Term Debt and Bank Facility Borrowings (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowings 35 false false R36.htm 995715 - Disclosure - Income Taxes (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureIncomeTaxes 36 false false R37.htm 995725 - Disclosure - Supplemental Disclosure of Cash Flow Information (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSupplementalDisclosureOfCashFlowInformationTables Supplemental Disclosure of Cash Flow Information (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSupplementalDisclosureOfCashFlowInformation 37 false false R38.htm 995735 - Disclosure - Earnings Per Limited Partner Unit (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureEarningsPerLimitedPartnerUnitTables Earnings Per Limited Partner Unit (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureEarningsPerLimitedPartnerUnit 38 false false R39.htm 995745 - Disclosure - Segment Reporting (Tables) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureSegmentReportingTables Segment Reporting (Tables) Tables http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureSegmentReporting 39 false false R40.htm 995755 - Disclosure - Organization - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureOrganizationAdditionalInformationDetail Organization - Additional Information (Detail) Details 40 false false R41.htm 995765 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail Summary of Significant Accounting Policies - Additional Information (Detail) Details 41 false false R42.htm 995775 - Disclosure - Revenue Recognition - Summary of Disaggregation of Revenue by Major Sources (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionSummaryOfDisaggregationOfRevenueByMajorSourcesDetail Revenue Recognition - Summary of Disaggregation of Revenue by Major Sources (Detail) Details 42 false false R43.htm 995785 - Disclosure - Revenue Recognition - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionAdditionalInformationDetail Revenue Recognition - Additional Information (Detail) Details 43 false false R44.htm 995795 - Disclosure - Revenue Recognition - Summary of Changes in Allowance for Credit Losses (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionSummaryOfChangesInAllowanceForCreditLossesDetail Revenue Recognition - Summary of Changes in Allowance for Credit Losses (Detail) Details 44 false false R45.htm 995805 - Disclosure - Common Unit Repurchase and Retirement - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirementAdditionalInformationDetail Common Unit Repurchase and Retirement - Additional Information (Detail) Details 45 false false R46.htm 995815 - Disclosure - Common Unit Repurchase and Retirement - Company's Repurchase Activities (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirementCompanySRepurchaseActivitiesDetail Common Unit Repurchase and Retirement - Company's Repurchase Activities (Detail) Details 46 false false R47.htm 995825 - Disclosure - Common Unit Repurchase and Retirement - Company's Repurchase Activities (Parenthetical) (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCommonUnitRepurchaseAndRetirementCompanySRepurchaseActivitiesParentheticalDetail Common Unit Repurchase and Retirement - Company's Repurchase Activities (Parenthetical) (Detail) Details 47 false false R48.htm 995835 - Disclosure - Captive Insurance Collateral - Schedule of Captive Insurance Collateral to be Available-for-sale Investments (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCaptiveInsuranceCollateralScheduleOfCaptiveInsuranceCollateralToBeAvailableForSaleInvestmentsDetail Captive Insurance Collateral - Schedule of Captive Insurance Collateral to be Available-for-sale Investments (Detail) Details 48 false false R49.htm 995845 - Disclosure - Captive Insurance Collateral - Schedule of Maturities of Investments (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureCaptiveInsuranceCollateralScheduleOfMaturitiesOfInvestmentsDetail Captive Insurance Collateral - Schedule of Maturities of Investments (Detail) Details 49 false false R50.htm 995855 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurementsAdditionalInformationDetail Derivatives and Hedging-Disclosures and Fair Value Measurements - Additional Information (Detail) Details 50 false false R51.htm 995865 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements - Company's Commodity Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurementsCompanySCommodityFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail Derivatives and Hedging-Disclosures and Fair Value Measurements - Company's Commodity Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) Details 51 false false R52.htm 995875 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements - Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities) (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurementsOffsettingOfFinancialAssetsLiabilitiesAndDerivativeAssetsLiabilitiesDetail Derivatives and Hedging-Disclosures and Fair Value Measurements - Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities) (Detail) Details 52 false false R53.htm 995885 - Disclosure - Derivatives and Hedging-Disclosures and Fair Value Measurements - Effect of Derivative Instruments on Statement of Operations (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureDerivativesAndHedgingDisclosuresAndFairValueMeasurementsEffectOfDerivativeInstrumentsOnStatementOfOperationsDetail Derivatives and Hedging-Disclosures and Fair Value Measurements - Effect of Derivative Instruments on Statement of Operations (Detail) Details 53 false false R54.htm 995895 - Disclosure - Inventories - Components of Inventory (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureInventoriesComponentsOfInventoryDetail Inventories - Components of Inventory (Detail) Details 54 false false R55.htm 995905 - Disclosure - Property and Equipment - Component of Property and Equipment (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosurePropertyAndEquipmentComponentOfPropertyAndEquipmentDetail Property and Equipment - Component of Property and Equipment (Detail) Details 55 false false R56.htm 995915 - Disclosure - Business Combinations and Divestitures - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureBusinessCombinationsAndDivestituresAdditionalInformationDetail Business Combinations and Divestitures - Additional Information (Detail) Details 56 false false R57.htm 995925 - Disclosure - Goodwill and Intangible Assets, net - Summary of Changes in Company's Goodwill (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetSummaryOfChangesInCompanysGoodwillDetail Goodwill and Intangible Assets, net - Summary of Changes in Company's Goodwill (Detail) Details 57 false false R58.htm 995935 - Disclosure - Goodwill and Intangible Assets, net - Intangible Assets Subject to Amortization (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetIntangibleAssetsSubjectToAmortizationDetail Goodwill and Intangible Assets, net - Intangible Assets Subject to Amortization (Detail) Details 58 false false R59.htm 995945 - Disclosure - Goodwill and Intangible Assets, net - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetAdditionalInformationDetail Goodwill and Intangible Assets, net - Additional Information (Detail) Details 59 false false R60.htm 995955 - Disclosure - Long-Term Debt and Bank Facility Borrowings - Company's Debt (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowingsCompanySDebtDetail Long-Term Debt and Bank Facility Borrowings - Company's Debt (Detail) Details 60 false false R61.htm 995965 - Disclosure - Long-Term Debt and Bank Facility Borrowings - Company's Debt (Parenthetical) (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowingsCompanySDebtParentheticalDetail Long-Term Debt and Bank Facility Borrowings - Company's Debt (Parenthetical) (Detail) Details 61 false false R62.htm 995975 - Disclosure - Long-Term Debt and Bank Facility Borrowings - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureLongTermDebtAndBankFacilityBorrowingsAdditionalInformationDetail Long-Term Debt and Bank Facility Borrowings - Additional Information (Detail) Details 62 false false R63.htm 995985 - Disclosure - Income Taxes - Current and Deferred Income Tax Expense (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureIncomeTaxesCurrentAndDeferredIncomeTaxExpenseDetail Income Taxes - Current and Deferred Income Tax Expense (Detail) Details 63 false false R64.htm 995995 - Disclosure - Income Taxes - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureIncomeTaxesAdditionalInformationDetail Income Taxes - Additional Information (Detail) Details 64 false false R65.htm 996005 - Disclosure - Supplemental Disclosure of Cash Flow Information - Schedule of Supplemental Disclosure of Cash Flow Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSupplementalDisclosureOfCashFlowInformationScheduleOfSupplementalDisclosureOfCashFlowInformationDetail Supplemental Disclosure of Cash Flow Information - Schedule of Supplemental Disclosure of Cash Flow Information (Detail) Details 65 false false R66.htm 996015 - Disclosure - Earnings Per Limited Partner Unit - Net Income Allocation and Per Unit Data (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureEarningsPerLimitedPartnerUnitNetIncomeAllocationAndPerUnitDataDetail Earnings Per Limited Partner Unit - Net Income Allocation and Per Unit Data (Detail) Details 66 false false R67.htm 996025 - Disclosure - Segment Reporting - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetail Segment Reporting - Additional Information (Detail) Details 67 false false R68.htm 996035 - Disclosure - Segment Reporting - Summary of Segment Financial Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/DisclosureSegmentReportingSummaryOfSegmentFinancialInformationDetail Segment Reporting - Summary of Segment Financial Information (Detail) Details 68 false false R69.htm 996045 - Disclosure - Subsequent Events - Additional Information (Detail) Sheet http://www.stargrouplp.com/20260630/taxonomy/role/Role_DisclosureSubsequentEventsAdditionalInformationDetail Subsequent Events - Additional Information (Detail) Details 69 false false All Reports Book All Reports sgu-20260630.htm sgu-20260630.xsd http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 false false