Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment and Finance Lease right-of-use asset, before accumulated depreciation and amortization	$ 1,818,710
Less accumulated depreciation	(571,543)
Property, Plant, and Equipment and Finance Lease Right-of-use asset, Net	1,247,167
Property, Plant and Equipment, gross		$ 1,068,994
Less accumulated depreciation		(486,204)
Property, Plant and Equipment, net		582,790
Land and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	17,050	9,001
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	297,520	249,238
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	1,360,908	739,330
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	118,232	$ 71,425
Finance Lease Right-of-Use Asset
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	$ 25,000