Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Sales:
Product	$ 1,518,738		$ 1,295,374		$ 1,392,871
Installations and service	223,058		202,214		198,439
Total sales	1,741,796		1,497,588		1,591,310
Cost and expenses:
Cost of product	1,192,009		1,024,071		1,057,783
Cost of installations and service	196,659		175,740		179,558
(Increase) decrease in fair value of derivative instruments	6,775		(8,549)		2,567
Delivery and branch expenses	250,210		217,376		250,762
Depreciation and amortization expenses	17,303		16,395		17,884
General and administrative expenses	18,356		18,689		20,709
Finance charge income	(5,521)		(4,393)		(4,814)
Operating income	66,005		58,259		66,861
Interest expense, net	(14,433)		(14,060)		(15,654)
Amortization of debt issuance costs	(1,745)		(1,634)		(2,440)
Loss on redemption of debt					(1,700)
Income before income taxes	49,827		42,565		47,067
Income tax expense	19,921		16,576		22,723
Net income	29,906		25,989		24,344
General Partner's interest in net income	159		136		115
Limited Partners' interest in net income	$ 29,747		$ 25,853		$ 24,229
Basic and diluted income per Limited Partner Unit	$ 0.47	[1]	$ 0.40	[1]	$ 0.35	[1]
Weighted average number of Limited Partner units outstanding:
Basic and Diluted	59,409		61,931		66,822

[1] See Note 17 Earnings Per Limited Partner Units.