CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 711,359	$ 638,318	$ 558,524
Cost of sales	599,796	497,526	415,739
Gross profit	111,563	140,792	142,785
Selling, general and administrative expenses	122,376	102,340	76,820
Impairment charges	256,266
Research and development expenses	7,933	7,898	7,937
Operating (loss) income	(275,012)	30,554	58,028
Other (expense) income:
Interest expense	(20,855)	(15,770)	(6,997)
Interest and other income, net	3,045	2,577	2,823
Total other (expense) income	(17,810)	(13,193)	(4,174)
(Loss) income before income taxes	(292,822)	17,361	53,854
Income tax provision	23,299	5,985	19,088
Net (loss) income	$ (316,121)	$ 11,376	$ 34,766
Basic (loss) income per common share (in dollars per share)	$ (8.98)	$ 0.35	$ 1.19
Diluted (loss) income per common share (in dollars per share)	$ (8.98)	$ 0.35	$ 1.18
Weighted average shares outstanding:
Basic (in shares)	35,216	32,283	29,110
Diluted (in shares)	35,216	32,632	29,581