Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Finance lease right-of-use asset	$ 25,000	$ 25,000
Property, plant, and equipment and finance lease right-of-use asset, before accumulated depreciation	2,003,293	1,853,361
Less accumulated depreciation	(752,813)	(638,589)
Property, plant, and equipment, net	1,250,480	1,214,772
Land and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	20,381	18,396
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	412,958	345,736
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,432,604	1,352,835
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 112,350	$ 111,394