Condensed Consolidated Statements Of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Revenues (including contract research and development)
Domestic	$ 50,156	$ 48,764	$ 105,725	$ 98,002
International	76,601	72,123	159,405	143,019
Total Revenues	126,757	120,887	265,130	241,021
Costs, Expenses and Other Expense (Income)
Cost of goods sold (including contract research and development)	83,289	70,851	166,652	141,749
Internal research and development	5,016	3,357	10,179	7,203
Selling, general and administrative	24,214	21,991	51,026	44,720
Interest expense	77	25	136	55
Other expense (income), net	(1,506)	460	(3,136)	(1,602)
Total Costs, Expenses, and Other Expense (Income)	111,090	96,684	224,857	192,125
Earnings Before Income Taxes	15,667	24,203	40,273	48,896
Income Taxes	2,147	4,948	8,039	11,240
Net Earnings	13,520	19,255	32,234	37,656
Less: Net Earnings Attributable to Noncontrolling Interest	233	98	368	132
Net Earnings Attributable to II-VI Incorporated	$ 13,287	$ 19,157	$ 31,866	$ 37,524
Net Earnings Attributable to II-VI Incorporated: Basic Earnings Per Share:	$ 0.21	$ 0.31	$ 0.51	$ 0.61
Net Earnings Attributable to II-VI Incorporated: Diluted Earnings Per Share:	$ 0.21	$ 0.30	$ 0.50	$ 0.59