Acquisition Bid (Details) £ / shares in Units, $ in Thousands, £ in Millions				3 Months Ended		9 Months Ended
	Apr. 08, 2016 USD ($)	Feb. 26, 2016 USD ($)	Jan. 12, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Feb. 17, 2016 £ / shares	Jan. 12, 2016 GBP (£) £ / shares	Jan. 12, 2016 USD ($)	Jun. 30, 2015 USD ($)
Acquisition Bid
Amount outstanding				$ 140,000		$ 140,000					$ 0
Other income (expense), net
Acquisition Bid
Foreign currency exchange gains (losses)				(2,700)	$ 400	(2,000)	$ 400
KBC
Acquisition Bid
Proposed transaction value, per share (in GBP per share) | £ / shares									£ 1.85
Proposed transaction value | £									£ 158
Proposed transaction value, funded by cash on hand										$ 91,000
Amount placed in escrow, cash funding portion			$ 91,000
Amount placed in escrow, foreign exchange fluctuations			23,100
Amount placed in escrow, costs that may become payable under the Bridge Credit Agreement			$ 800
Amount returned from escrow account	$ 251,700
KBC | Other income (expense), net
Acquisition Bid
Foreign currency exchange gains (losses)				(3,400)		(3,400)
KBC | General and administrative
Acquisition Bid
Acquisition Bid and Bridge Credit Agreement costs				4,200		5,200
KBC | Yokogawa
Acquisition Bid
Proposed transaction value, per share (in GBP per share) | £ / shares								£ 2.10
Bridge Loan | Bridge Credit Agreement
Acquisition Bid
Principal amount										$ 140,000
Debt amount canceled		$ 140,000
Line of Credit | Credit Agreement
Acquisition Bid
Principal amount		250,000
Amount outstanding		$ 140,000		$ 140,000		$ 140,000