Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 871,108	$ 730,460
Less accumulated depreciation	(390,094)	(362,732)
Property, Plant and Equipment, net	481,014	367,728
Land and Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	9,210	5,667
Buildings and Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	200,886	144,293
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	567,724	492,042
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 93,288	$ 88,458