Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	3 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill [Line Items]
Balance-beginning of period	$ 233,755
Foreign currency translation	(151)
Balance-end of period	233,604
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	84,105
Foreign currency translation	8
Balance-end of period	84,113
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	96,760
Foreign currency translation	(159)
Balance-end of period	96,601
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period	52,890
Balance-end of period	$ 52,890