Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 1,425,625	$ 870,724	$ 2,547,604	$ 1,872,908
Cost of products sold	1,087,248	666,247	1,939,474	1,417,364
Gross profit	338,377	204,477	608,130	455,544
Operating expense	395,775	207,533	616,432	411,643
Income (loss) from operations	(57,398)	(3,056)	(8,302)	43,901
Interest expense, financing costs, and other	39,570	12,268	62,138	25,842
Income (loss) before provision for income taxes	(96,968)	(15,324)	(70,440)	18,059
Provision for (benefit from) income taxes	(30,313)	(5,968)	(71,381)	6,985
Net income (loss)	(66,655)	(9,356)	941	11,074
Dividends on preferred shares, declared	6,000	0	6,000	0
Net income (loss) attributable to common shareholders	$ (72,655)	$ (9,356)	$ (5,059)	$ 11,074
Weighted-average common stock outstanding:
Basic	68,019,300	60,141,580	67,922,276	60,041,332
Diluted	68,019,300	60,141,580	67,922,276	61,069,938
Net income (loss) per share:
Basic	$ (1.07)	$ (0.16)	$ (0.07)	$ 0.18
Diluted	$ (1.07)	$ (0.16)	$ (0.07)	$ 0.18