CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 652	$ 12,132	$ (8,462)
Other comprehensive (loss) income, net of tax:
Unrealized (losses) gains on derivative instruments designated as cash flow hedges	(14,295)	18,685	(7,866)
(Gains) losses on derivative instruments designated as cash flow hedges reclassified to cost of goods sold	(4,211)	(1,161)	(55)
Change in the funded status of retiree benefit obligations	(14,122)	(2,802)	10,969
Income tax expense	0	0	(1,066)
Total comprehensive (loss) income, net of tax	$ (31,976)	$ 26,854	$ (6,480)