Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment
Less: accumulated depreciation	$ (83,424)		$ (83,424)	$ (89,996)
Property, plant and equipment, net before construction in progress	165,239		165,239	196,032
Property, plant and equipment, net	186,670		186,670	233,247
Depreciation expense			23,400	22,400	$ 21,800
Disposal group held for sale
Property, Plant and Equipment
Property, plant and equipment, held for sale	6,700		6,700
Impairment of long-lived assets	2,900	$ 29,900	29,900
Impairment charges	3,000
Held in foreign countries
Property, Plant and Equipment
Property, plant and equipment, net	1,000		1,000	1,100
Land
Property, Plant and Equipment
Property, plant and equipment, gross	1,783		1,783	2,900
Building and improvements
Property, Plant and Equipment
Property, plant and equipment, gross	87,609		87,609	105,041
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	156,166		156,166	173,988
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, gross	3,105		3,105	4,099
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, net	$ 21,431		$ 21,431	$ 37,215