Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Sales:
Product	$ 198,450		$ 130,168		$ 1,289,870		$ 942,646
Installations and service	48,322		46,593		148,268		134,666
Total sales	246,772		176,761		1,438,138		1,077,312
Cost and expenses:
Cost of product	154,379		93,345		975,205		669,573
Cost of installations and service	40,760		40,066		139,457		128,255
(Increase) decrease in the fair value of derivative instruments	16,323		2,324		(10,844)		(5,770)
Delivery and branch expenses	53,828		45,076		201,764		169,770
Depreciation and amortization expenses	4,420		4,083		13,696		11,179
General and administrative expenses	5,328		5,748		15,516		16,447
Operating income (loss)	(28,266)		(13,881)		103,344		87,858
Interest expense	(3,918)		(3,103)		(12,457)		(11,258)
Interest income	2,018		1,421		3,791		2,750
Amortization of debt issuance costs	(618)		(660)		(2,044)		(1,988)
Loss on redemption of debt					(1,700)		(1,132)
Income (loss) before income taxes	(30,784)		(16,223)		90,934		76,230
Income tax expense (benefit)	(12,587)		(6,232)		39,892		33,681
Net income (loss)	(18,197)		(9,991)		51,042		42,549
General Partner's interest in net income (loss)	(88)		(47)		247		194
Limited Partners' interest in net income (loss)	$ (18,109)		$ (9,944)		$ 50,795		$ 42,355
Basic and Diluted income (loss) per Limited Partner Unit	$ (0.27)	[1]	$ (0.14)	[1]	$ 0.66	[1]	$ 0.53	[1]
Weighted average number of Limited Partner units outstanding:
Basic and Diluted	67,078		69,469		67,078		70,819

[1] See Note 3 Summary of Significant Accounting Policies - Net Income (Loss) per Limited Partner Unit.