Condensed Financial Information of Registrant Balance Sheets (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2013
8.875% Senior Notes
Condensed Balance Sheet Statements, Captions [Line Items]
Maturity of public notes due	Dec. 01, 2017
STAR GAS PARTNERS, L.P.
Condensed Balance Sheet Statements, Captions [Line Items]
Scheduled principal repayments of long-term debt during 2014	$ 0
Scheduled principal repayments of long-term debt during 2015	0
Scheduled principal repayments of long-term debt during 2016	0
Scheduled principal repayments of long-term debt during 2017	0
Scheduled principal repayments of long-term debt during 2018	125,000
Scheduled principal repayments of long-term debt during thereafter	0
STAR GAS PARTNERS, L.P. \| 8.875% Senior Notes
Condensed Balance Sheet Statements, Captions [Line Items]
Senior notes	$ 125,000
Maturity of public notes due	Dec. 01, 2017

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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Amount of long-term debt of the registrant maturing in the third fiscal year following the latest fiscal year.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-04.(a))

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Amount of long-term debt of the registrant maturing after the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt of the registrant maturing in the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt of the registrant maturing in the fourth fiscal year following the latest fiscal year.

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Amount of long-term debt of the registrant maturing in the second fiscal year following the latest fiscal year.

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Amount of long-term debt of the registrant maturing in the next fiscal year following the latest fiscal year.

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