Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Current Assets
Cash and cash equivalents	$ 134,944	$ 149,460
Accounts receivable - less allowance for doubtful accounts of $1,536 and $766, respectively	104,761	90,606
Inventories	137,607	126,430
Deferred income taxes	10,796	8,215
Prepaid and refundable income taxes	8,488	8,606
Prepaid and other current assets	13,777	12,223
Total Current Assets	410,373	395,540
Property, plant and equipment, net	153,918	138,135
Goodwill	80,748	64,262
Other intangible assets, net	44,014	28,732
Investments	10,661	15,458
Deferred income taxes	145	3
Other assets	6,627	5,072
Total Assets	706,486	647,202
Current Liabilities
Accounts payable	29,420	25,065
Accrued compensation and benefits	27,234	33,889
Accrued income tax payable	8,761	5,290
Deferred income taxes	209	141
Other accrued liabilities	18,104	22,853
Current portion of long-term debt		3,729
Total Current Liabilities	83,728	90,967
Long-term debt	12,769	15,000
Deferred income taxes	5,883	6,641
Other liabilities	12,720	11,493
Total Liabilities	115,100	124,101
Shareholders' Equity
Preferred stock, no par value; authorized - 5,000,000 shares; none issued
Common Stock, no par value; authorized - 300,000,000 shares;issued - 69,626,883 shares and 69,077,492 shares, respectively	176,295	159,186
Accumulated other comprehensive income	10,238	13,116
Retained earnings	438,671	378,365
Stock holders' equity excluding treasury stock	625,204	550,667
Treasury stock at cost, 6,793,928 shares and 6,393,659 shares, respectively	35,247	28,293
Total II-VI Incorporated Shareholders' Equity	589,957	522,374
Noncontrolling Interests	1,429	727
Total Shareholders' Equity	591,386	523,101
Total Liabilities and Shareholders' Equity	$ 706,486	$ 647,202