Accrued Expenses (Schedule of Components of Accrued Expenses) (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Payables And Accruals [Abstract]
Accrued compensation	$ 5,793	$ 6,880
Accrued environmental remediation costs-current portion	6,112	9,180
Reserve for price concessions	80,556	31,342
Partnered product liabilities	16,068
Other accrued expenses	9,799	5,273
Accrued expenses	$ 118,328	$ 52,675