Capital Lease - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2018
Capital Leased Assets [Line Items]
Capital leases future minimum payments present value at inception	$ 25,000	$ 25,000
Property, plant and equipment estimated useful lives, years		15 years
Depreciation		$ 55,616	$ 47,157
Capital Leased Asset
Capital Leased Assets [Line Items]
Depreciation	$ 400	$ 1,200