Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment
Less: accumulated depreciation	$ (89,996)	$ (71,461)
Property, plant and equipment, net before construction in progress	196,032	188,499
Property, plant and equipment, net	233,247	243,148
Depreciation expense	22,400	21,800	$ 13,900
Impairment charges	25,000	0	$ 0
Cody Restructuring Plan
Property, Plant and Equipment
Impairment charges	21,500
Plant-related assets located in Townsend Road facility
Property, Plant and Equipment
Impairment charges	3,500
Held in foreign countries
Property, Plant and Equipment
Property, plant and equipment, net	1,100	1,000
Land
Property, Plant and Equipment
Property, plant and equipment, gross	2,900	6,191
Building and improvements
Property, Plant and Equipment
Property, plant and equipment, gross	105,041	108,730
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	173,988	142,086
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, gross	4,099	2,953
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, net	$ 37,215	$ 54,649