Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2014	Jun. 30, 2014
Goodwill [Line Items]
Balance-beginning of period	$ 196,145
Foreign currency translation	(49)
Balance-end of period	196,096
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	44,041
Foreign currency translation	(232)
Balance-end of period	43,809
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	99,214
Foreign currency translation	183
Balance-end of period	99,397
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period		52,890
Balance-end of period	$ 52,890	$ 52,890