Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 II-VI Laser Solutions Operating Segments	Sep. 30, 2014 II-VI Photonics Operating Segments	Jun. 30, 2014 II-VI Photonics Operating Segments	Sep. 30, 2014 II- VI Performance Products Operating Segments	Jun. 30, 2014 II- VI Performance Products Operating Segments
Goodwill [Line Items]
Balance-beginning of period	$ 196,145	$ 44,041	$ 99,214	$ 99,214	$ 52,890	$ 52,890
Foreign currency translation	(122)	(122)
Balance-end of period	$ 196,023	$ 43,919	$ 99,214	$ 99,214	$ 52,890	$ 52,890