Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill [Line Items]
Balance-beginning of period	$ 195,894
Goodwill acquired	45,193
Foreign currency translation	(1,750)
Balance-end of period	239,337
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	43,578
Goodwill acquired	45,193
Foreign currency translation	49
Balance-end of period	88,820
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	99,426
Foreign currency translation	(1,799)
Balance-end of period	97,627
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period	52,890
Balance-end of period	$ 52,890