Consolidated Statements Of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Revenues (including contract research and development)
Domestic	$ 214,822	$ 204,136	$ 175,361
International	319,808	298,665	169,730
Total Revenues	534,630	502,801	345,091
Costs, Expenses and Other Expense (Income)
Cost of goods sold (including contract research and development)	341,889	295,902	210,492
Internal research and development	21,410	16,079	11,806
Selling, general and administrative	99,392	92,045	71,112
Interest expense	212	103	87
Other expense (income), net	(7,168)	(3,090)	277
Total Costs, Expenses and Other Expense	455,735	401,039	293,774
Earnings Before Income Taxes	78,895	101,762	51,317
Income taxes	17,620	18,744	12,582
Net Earnings	61,275	83,018	38,735
Less: Net Earnings Attributable to Noncontrolling Interests	969	336	158
Net Earnings Attributable to II-VI Incorporated	$ 60,306	$ 82,682	$ 38,577
Net Earnings Attributable to II-VI Incorporated: Basic Earnings Per Share:	$ 0.96	$ 1.33	$ 0.64
Net Earnings Attributable to II-VI Incorporated: Diluted Earnings Per Share:	$ 0.94	$ 1.30	$ 0.63