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Condensed Financial Information of Registrant (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
8.875% Senior Notes [Member]
Financial Information of Registrant (Textual) [Abstract]
Maturity of Senior Notes	2017-12
STAR GAS PARTNERS, L.P. [Member]
Financial Information of Registrant (Textual) [Abstract]
Scheduled principal repayments of long-term debt during 2013	$ 0
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 thereafter	125,000
Includes distributions from subsidiaries	39,173	32,579	117,310
STAR GAS PARTNERS, L.P. [Member] | 8.875% Senior Notes [Member]
Financial Information of Registrant (Textual) [Abstract]
Senior Notes	125,000
Maturity of Senior Notes	2017-12
Senior Notes	$ 125,000

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-Name Accounting Standards Codification

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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