Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 1,042,189	$ 947,863
Less accumulated depreciation	(472,660)	(422,973)
Property, Plant and Equipment, net	569,529	524,890
Land and Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	8,992	9,072
Buildings and Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	230,024	216,507
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	718,020	633,934
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 85,153	$ 88,350