Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Current Assets
Cash and cash equivalents	$ 123,833	$ 149,460
Short-term investment	594
Accounts receivable - less allowance for doubtful accounts of $1,386 at December 31, 2011 and $766 at June 30, 2011	87,608	90,606
Inventories	142,578	126,430
Deferred income taxes	9,596	8,215
Prepaid and refundable income taxes	4,822	8,606
Prepaid and other current assets	9,708	12,223
Total Current Assets	378,739	395,540
Property, plant & equipment, net	150,000	138,135
Goodwill	84,785	64,262
Other intangible assets, net	42,819	28,732
Investments	15,938	15,458
Deferred income taxes	71	3
Other assets	6,145	5,072
Total Assets	678,497	647,202
Current Liabilities
Accounts payable	26,581	25,065
Accrued compensation and benefits	25,162	33,889
Accrued income tax payable	2,251	5,290
Deferred income taxes	59	141
Other accrued liabilities	23,868	22,853
Current portion of long-term debt	3,888	3,729
Total Current Liabilities	81,809	90,967
Long-term debt	17,000	15,000
Deferred income taxes	4,968	6,641
Other liabilities	11,239	11,493
Total Liabilities	115,016	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 - 69,230,492 shares at December 31, 2011; 69,077,492 shares at June 30, 2011	168,902	159,186
Accumulated other comprehensive income	13,713	13,116
Retained earnings	410,231	378,365
Shareholders' equity excluding treasury stock	592,846	550,667
Treasury stock, at cost, 6,492,211 shares at December 31, 2011 and 6,393,659 shares at June 30, 2011	30,259	28,293
Total II-VI Incorporated Shareholders' Equity	562,587	522,374
Noncontrolling Interest	894	727
Total Shareholders' Equity	563,481	523,101
Total Liabilities and Shareholders' Equity	$ 678,497	$ 647,202