Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 65,975	$ 38,449	$ 51,931
Other comprehensive income (loss):
Foreign currency translation adjustments	(8,497)	2,363	5,362
Pension adjustment, net of taxes of ($602) for the year ended June 30, 2015 and $387 for the year ended June 30, 2014, respectively	(2,244)	1,443
Comprehensive income	55,234	42,255	57,293
Less: Earnings Attributable to Redeemable Noncontrolling Interest			1,118
Other comprehensive income (loss) attributable to redeemable noncontrolling interest:
Foreign currency translation adjustments attributable to redeemable noncontrolling interest			(295)
Comprehensive income attributable to redeemable noncontrolling interest			823
Comprehensive income attributable to II-VI Incorporated	$ 55,234	$ 42,255	$ 56,470