Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Line Items]
Balance-beginning of period	$ 196,145	$ 123,352
Goodwill acquired		73,093
Goodwill adjustment		(516)
Foreign currency translation	(251)	216
Balance-end of period	195,894	196,145
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	44,041	13,233
Goodwill acquired		30,718
Foreign currency translation	(463)	90
Balance-end of period	43,578	44,041
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	99,214	56,713
Goodwill acquired		42,375
Foreign currency translation	212	126
Balance-end of period	99,426	99,214
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period	52,890	53,406
Goodwill adjustment		(516)
Balance-end of period	$ 52,890	$ 52,890