Selected Quarterly Financial Data

12 Months Ended

Sep. 30, 2018

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data

19) Selected Quarterly Financial Data (unaudited)

	Three Months Ended
	Dec. 31,		Mar. 31,		Jun. 30,			Sep. 30,
(in thousands - except per unit data)	2017		2018		2018			2018			Total
Sales	$	436,834	$	684,031	$	327,354		$	229,618		$	1,677,837
Gross profit for product, installation and service		124,499		216,079		79,377			43,387			463,342
Operating income (loss)		31,066		85,473		(8,817	)		(41,654	)		66,068
Income (loss) before income taxes		28,670		82,783		(11,421	)		(36,925	)		63,107
Net income (loss)		30,182		54,778		(8,005	)		(21,450	)		55,505
Limited Partner interest in net income (loss)		30,007		54,459		(7,956	)		(21,319	)		55,191
Net income (loss) per Limited Partner unit:
Basic and diluted (a)	$	0.45	$	0.81	$	(0.15	)		(0.40	)	$	0.89

	Three Months Ended
	Dec. 31,		Mar. 31,		Jun. 30,			Sep. 30,
(in thousands - except per unit data)	2016		2017		2017			2017			Total
Sales	$	384,118	$	532,052	$	225,801		$	181,584		$	1,323,555
Gross profit for product, installation and service		118,038		184,685		63,309			42,467			408,499
Operating income (loss)		33,237		69,032		(19,811	)		(27,126	)		55,332
Income (loss) before income taxes		31,138		66,996		(21,766	)		(29,092	)		47,276
Net income (loss)		18,275		39,704		(13,332	)		(17,747	)		26,900
Limited Partner interest in net income (loss)		18,170		39,471		(13,253	)		(17,644	)		26,744
Net income (loss) per Limited Partner unit:
Basic and diluted (a)	$	0.28	$	0.59	$	(0.24	)	$	(0.32	)	$	0.46

(a) The sum of the quarters do not add-up to the total due to the weighting of Limited Partner Units outstanding, rounding or the theoretical effects of FASB ASC 260-10-45-60 to Master Limited Partners earnings per unit.