Condensed Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Revenues
Domestic	$ 65,176	$ 51,233	$ 168,938	$ 156,958
International	79,994	81,357	234,413	240,762
Total Revenues	145,170	132,590	403,351	397,720
Costs, Expenses and Other Expense (Income)
Cost of goods sold	94,169	86,589	256,645	253,241
Internal research and development	5,781	5,698	16,992	15,877
Selling, general and administrative	27,217	23,329	80,182	74,355
Interest expense	449	48	708	184
Other expense (income), net	(1,401)	(2,311)	(6,713)	(5,447)
Total Costs, Expenses and Other Expense (Income)	126,215	113,353	347,814	338,210
Earnings Before Income Taxes	18,955	19,237	55,537	59,510
Income Taxes	2,861	4,967	13,844	13,006
Net Earnings	16,094	14,270	41,693	46,504
Less: Net Earnings Attributable to Noncontrolling Interests	225	276	906	644
Net Earnings Attributable to II-VI Incorporated	$ 15,869	$ 13,994	$ 40,787	$ 45,860
Net Earnings Attributable to II-VI Incorporated: Basic Earnings Per Share:	$ 0.26	$ 0.22	$ 0.65	$ 0.73
Net Earnings Attributable to II-VI Incorporated: Diluted Earnings Per Share:	$ 0.25	$ 0.22	$ 0.64	$ 0.71