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Selected Quarterly Financial Data (Tables)

12 Months Ended

Sep. 30, 2012

Selected Quarterly Financial Data [Abstract]

Nature of partnerships business


		Three Months Ended
		Dec. 31,				Mar. 31,				Jun. 30,				Sep. 30,
(in thousands - except per unit data)		2011				2012				2012				2012				Total
Sales		$	461,474			$	629,592			$	232,476			$	174,046			$	1,497,588
Gross profit for product, installation and service			92,450				125,994				46,550				32,783				297,777
Operating income (loss)			8,581				72,879				(20,051	)			(7,543	)			53,866
Income (loss) before income taxes			5,583				69,873				(22,434	)			(10,457	)			42,565
Net income (loss)			2,931				40,482				(11,789	)			(5,635	)			25,989
Limited Partner interest in net income (loss)			2,916				40,269				(11,727	)			(5,605	)			25,853
Net income (loss) per Limited Partner unit:
Basic and diluted (a)		$	0.05			$	0.55			$	(0.19	)		$	(0.09	)		$	0.40

		Three Months Ended
		Dec. 31,				Mar. 31,				Jun. 30,				Sep. 30,
(in thousands - except per unit data)		2010				2011				2011				2011				Total
Sales		$	459,501			$	731,865			$	246,772			$	153,172			$	1,591,310
Gross profit for product, installation and service			105,207				166,636				51,633				30,493				353,969
Operating income (loss)			43,651				87,959				(28,266	)			(41,297	)			62,047
Income (loss) before income taxes			37,569				84,149				(30,784	)			(43,867	)			47,067
Net income (loss)			20,558				48,681				(18,197	)			(26,698	)			24,344
Limited Partner interest in net income (loss)			20,459				48,445				(18,109	)			(26,566	)			24,229
Net income (loss) per Limited Partner unit:
Basic and diluted (a)		$	0.26			$	0.61			$	(0.27	)		$	(0.40	)		$	0.35