Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales		$ 1,429,037	$ 1,425,625	$ 3,150,713	$ 2,547,604
Cost of products sold		1,094,049	1,087,248	2,380,156	1,939,474
Gross profit		334,988	338,377	770,557	608,130
Operating expense:
Selling, general and administrative		320,408	341,587	648,101	535,340
Depreciation		17,447	17,120	35,048	25,829
Amortization		51,763	37,068	103,784	55,263
Total operating expense		389,618	395,775	786,933	616,432
Income (loss) from operations		(54,630)	(57,398)	(16,376)	(8,302)
Interest expense, financing costs, and other		40,452	39,570	78,813	62,138
Income (loss) before provision for income taxes		(95,082)	(96,968)	(95,189)	(70,440)
Provision for (benefit from) income taxes	[1]	(26,996)	(30,313)	(26,210)	(71,381)
Net income (loss)		(68,086)	(66,655)	(68,979)	941
Dividends on preferred shares	[2]	6,000	6,000	12,000	6,000
Net income (loss) attributable to common shareholders		$ (74,086)	$ (72,655)	$ (80,979)	$ (5,059)
Weighted-average common stock outstanding:
Basic		68,451,920	68,019,300	68,348,850	67,922,276
Diluted		68,451,920	68,019,300	68,348,850	67,922,276
Net income (loss) per share:
Basic	[3]	$ (1.08)	$ (1.07)	$ (1.18)	$ (0.07)
Diluted	[3]	$ (1.08)	$ (1.07)	$ (1.18)	$ (0.07)

[1] Three and six months ended March 31, 2018 amounts include a non-recurring net tax benefit of $1.5 million and $48.0 million, respectively, resulting from recording the provisional impact of the enactment of the 2017 Tax Cuts and Jobs Act (“TCJA”).

[2] Amounts for the three months ended March 31, 2019 and the three and six months ended March 31, 2018 are composed of $5.0 million in undeclared cumulative Preferred Stock dividends, as well as an additional $1.0 million of Preferred Stock dividends that had been declared and paid as of period end. Six months ended March 31, 2019 amount is composed of $5.0 million in undeclared cumulative Preferred Stock dividends, as well as an additional $7.0 million of Preferred Stock dividends that had been declared and paid as of period end. See Note 3 for further discussion.

[3] See Note 5 for detailed calculations and further discussion.