Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Sales:
Product	$ 406,669		$ 404,968
Installations and service	54,805		54,533
Total sales	461,474		459,501
Cost and expenses:
Cost of product	316,673		301,672
Cost of installations and service	52,351		52,622
(Increase) decrease in the fair value of derivative instruments	7,118		(13,906)
Delivery and branch expenses	67,757		65,961
Depreciation and amortization expenses	3,629		4,577
General and administrative expenses	5,365		4,924
Operating income	8,581		43,651
Interest expense	(3,452)		(4,220)
Interest income	728		532
Amortization of debt issuance costs	(274)		(694)
Loss on redemption of debt			(1,700)
Income before income taxes	5,583		37,569
Income tax expense	2,652		17,011
Net income	2,931		20,558
General Partner's interest in net income	15		99
Limited Partners' interest in net income	$ 2,916		$ 20,459
Basic and Diluted income per Limited Partner Unit (1)	$ 0.05	[1]	$ 0.26	[1]
Weighted average number of Limited Partner units outstanding:
Basic and Diluted	64,189		67,078

[1] See Note 3 Summary of Significant Accounting Policies — Net Income per Limited Partner Unit.