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v2.4.1.9

Partnership's Debt (Parenthetical) (Detail) (8.875% Senior Notes, USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Dec. 31, 2014
8.875% Senior Notes |
Debt Instrument [Line Items] |
Senior notes issuance date | Nov. 01, 2010
Interest accrued by public notes for each year | 8.875%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_LongtermDebtTypeAxis = sgu_EightPointEightSevenFivePercentSeniorNotesMember
Discount on notes | $ 0.4 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = sgu_EightPointEightSevenFivePercentSeniorNotesMember
Maximum debt allowed for acquisitions | 100 sgu_MaximumDebtAllowedForAcquisitions / us-gaap_LongtermDebtTypeAxis = sgu_EightPointEightSevenFivePercentSeniorNotesMember
Restricted payments without passing certain financial tests | $ 22 sgu_RestrictedPaymentsWithoutPassingCertainFinancialTests / us-gaap_LongtermDebtTypeAxis = sgu_EightPointEightSevenFivePercentSeniorNotesMember
Maturity of public notes due | Dec. 01, 2017
Interest payment frequency | Semi-annual interest payments on June 1 and December 1 of each year

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