CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 1,594	$ 1,192	$ 23,288	$ 5,679
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on derivative instruments designated as cash flow hedges	104	(1,245)	(1,249)	(5,575)
(Gains) losses on derivative instruments designated as cash flow hedges reclassified to cost of goods sold	(516)	2,677	(366)	11,504
Total comprehensive income, net of tax	$ 1,182	$ 2,624	$ 21,673	$ 11,608