Inventories - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Inventory Disclosure [Abstract]
Reduction to net loss resulting from effect of LIFO inventory liquidation	$ 4,200,000	$ 4,900,000
Beneficial effect of LIFO inventory liquidation			$ 0