Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Sales:
Product	$ 267,694		$ 208,862		$ 1,571,034		$ 1,396,281
Installations and service	58,817		53,662		168,328		167,907
Total sales	326,511		262,524		1,739,362		1,564,188
Cost and expenses:
Cost of product	215,826		163,515		1,213,967		1,091,918
Cost of installations and service	50,003		44,102		156,478		152,661
(Increase) decrease in the fair value of derivative instruments	(3,308)		1,910		(4,661)		6,428
Delivery and branch expenses	66,347		53,798		227,175		205,507
Depreciation and amortization expenses	5,760		4,328		15,036		13,007
General and administrative expenses	5,140		4,557		16,995		13,809
Finance charge income	(2,460)		(1,685)		(5,671)		(4,947)
Operating income (loss)	(10,797)		(8,001)		120,043		85,805
Interest expense, net	(5,427)		(3,536)		(13,324)		(10,967)
Amortization of debt issuance costs	(394)		(415)		(1,205)		(1,325)
Income (loss) before income taxes	(16,618)		(11,952)		105,514		73,513
Income tax expense (benefit)	(7,026)		(4,364)		43,602		29,670
Net income (loss)	(9,592)		(7,588)		61,912		43,843
General Partner's interest in net income (loss)	(54)		(41)		349		237
Limited Partners' interest in net income (loss)	$ (9,538)		$ (7,547)		$ 61,563		$ 43,606
Basic and diluted income (loss) per Limited Partner Unit	$ (0.17)	[1]	$ (0.13)	[1]	$ 0.91	[1]	$ 0.63	[1]
Weighted average number of Limited Partner units outstanding:
Basic and Diluted	57,468		59,370		57,482		59,918

[1] See Note 14 Earnings (Loss) Per Limited Partner Unit.