Capital Lease - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Capital Leased Assets [Line Items]
Capital leases future minimum payments present value at inception	$ 25,000
Property, plant and equipment estimated useful lives, years	15 years
Depreciation expense	$ 50,894	$ 44,324	$ 41,114
Capital Leased Asset
Capital Leased Assets [Line Items]
Depreciation expense	$ 800