Quarterly Results of Operations - Summary of Unaudited Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 160,343	$ 165,698	$ 324,414	$ 224,439	$ 230,530	$ 210,984	$ 338,418	$ 227,313	$ 874,895	$ 1,007,246	$ 1,006,332
Gross profit	45,794	52,167	105,776	81,132	76,654	76,498	116,745	82,418	284,870	352,315	340,974
Operating income/(loss)	(130,996)	(30,647)	11,099	(8,651)	(11,434)	(7,811)	16,308	(7,588)	(159,194)	(10,525)	(20,950)
Net income/(loss)	$ (136,597)	$ (31,040)	$ 10,937	$ (9,629)	$ (12,049)	$ (8,289)	$ 16,006	$ (8,109)	$ (166,328)	$ (12,440)	$ (21,938)
Basic income/(loss) per share	$ (3.01)	$ (0.69)	$ 0.24	$ (0.21)	$ (0.27)	$ (0.18)	$ 0.35	$ (0.18)	$ (3.68)	$ (0.28)	$ (0.50)
Diluted income/(loss) per share	$ (3.01)	$ (0.69)	$ 0.24	$ (0.21)	$ (0.27)	$ (0.18)	$ 0.35	$ (0.18)	$ (3.68)	$ (0.28)	$ (0.50)