Divestiture - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Nov. 30, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Proceeds from divestiture (Note 4)	$ 0	$ 0	$ 56,127
Loss on divestiture	$ 0	$ 0	(131,463)
Infrastructure [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Loss on divestiture			127,900
Industrial [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Loss on divestiture			$ 3,600
Non-Core Businesses Sold to Madison Industries [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Net Book Value				$ 191,900