Consolidated Statements of Earnings and Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 363,907	$ 375,186	$ 1,067,877	$ 1,111,771
Cost of sales	273,699	275,945	793,457	813,564
Gross profit	90,208	99,241	274,420	298,207
Selling, general and administrative expenses	66,313	59,197	192,071	179,708
Goodwill impairment	311,114	0	311,114	0
(Loss) income from operations	(287,219)	40,044	(228,765)	118,499
Interest expense, net	(9,614)	(9,325)	(29,529)	(27,436)
Other income, net	256	2,657	289	3,960
(Loss) income before provision for income taxes	(296,577)	33,376	(258,005)	95,023
Benefit (provision) for income taxes	66,969	(9,360)	58,946	(26,906)
Net (loss) income	(229,608)	24,016	(199,059)	68,117
Other comprehensive income (loss), net	960	(21,936)	(4,722)	(36,128)
Comprehensive (loss) income	$ (228,648)	$ 2,080	$ (203,781)	$ 31,989
Net (loss) income per share:
Basic (in dollars per share)	$ (2.32)	$ 0.25	$ (2.02)	$ 0.70
Diluted (in dollars per share)	$ (2.32)	$ 0.24	$ (2.02)	$ 0.69
Weighted average shares outstanding:
Basic (in shares)	98,869,675	97,929,438	98,558,330	97,511,590
Diluted (in shares)	98,869,675	98,599,215	98,558,330	98,108,904