Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	3 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Line Items]
Balance-beginning of period	$ 195,894
Foreign currency translation	(1,300)
Balance-end of period	194,594
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	43,578
Foreign currency translation	2
Balance-end of period	43,580
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	99,426
Foreign currency translation	(1,302)
Balance-end of period	98,124
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period	52,890
Balance-end of period	$ 52,890