Coherent (COHR) 10-Q 8 Nov 13 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'IIVI	'
Entity Registrant Name	'II-VI INC	'
Entity Central Index Key	'0000820318	'
Current Fiscal Year End Date	'--06-30	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	62,551,552

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Current Assets	'	'
Cash and cash equivalents	$195,207	$185,433
Accounts receivable - less allowance for doubtful accounts of $1,105 at September 30, 2013 and $1,479 at June 30, 2013	102,782	107,173
Inventories	167,563	141,859
Deferred income taxes	10,472	10,794
Prepaid and refundable income taxes	4,037	4,543
Prepaid and other current assets	12,716	11,342
Total Current Assets	492,777	461,144
Property, plant & equipment, net	195,911	170,672
Goodwill	162,051	123,352
Other intangible assets, net	117,180	86,701
Investment	11,461	11,203
Deferred income taxes	6,060	2,696
Other assets	14,078	8,034
Total Assets	999,518	863,802
Current Liabilities	'	'
Current portion of long-term debt	20,000	'
Accounts payable	27,472	23,617
Accrued compensation and benefits	26,131	28,315
Accrued income tax payable	6,514	7,697
Deferred income taxes	110	110
Other accrued liabilities	26,321	34,695
Total Current Liabilities	106,548	94,434
Long-term debt	191,072	114,036
Deferred income taxes	17,192	4,095
Other liabilities	30,498	15,129
Total Liabilities	345,310	227,694
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 - 70,682,191 shares at September 30, 2013; 70,223,286 shares at June 30, 2013	202,983	194,284
Accumulated other comprehensive income	17,815	15,600
Retained earnings	492,572	482,878
Shareholders' equity excluding treasury stock	713,370	692,762
Treasury stock, at cost, 8,139,733 shares at September 30, 2013 and 8,011,733 shares at June 30, 2013	-59,162	-56,654
Total Shareholders' Equity	654,208	636,108
Total Liabilities and Shareholders' Equity	$999,518	$863,802

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowance for doubtful accounts	$1,105	$1,479
Preferred stock, par value	'	'
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	'	'
Common stock, par value	'	'
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	70,682,191	70,223,286
Treasury stock, shares	8,139,733	8,011,733

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Earnings (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Revenues	'	'
Domestic	$63,690	$52,283
International	87,482	80,009
Total Revenues	151,172	132,292
Costs, Expenses and Other Expense (Income)	'	'
Cost of goods sold	94,826	83,457
Internal research and development	7,747	5,585
Selling, general and administrative	35,112	26,656
Interest expense	483	36
Other expense (income), net	67	-761
Total Costs, Expenses, and Other Expense (Income)	138,235	114,973
Earnings Before Income Taxes	12,937	17,319
Income Taxes	3,243	4,187
Net Earnings	9,694	13,132
Less: Net Earnings Attributable to Redeemable Noncontrolling Interest	'	414
Net Earnings Attributable to II-VI Incorporated	$9,694	$12,718
Net Earnings Attributable to II-VI Incorporated: Basic Earnings Per Share:	$0.16	$0.20
Net Earnings Attributable to II-VI Incorporated: Diluted Earnings Per Share:	$0.15	$0.20

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Net earnings	$9,694	$13,132
Other comprehensive income:	'	'
Foreign currency translation adjustments	2,215	1,079
Comprehensive income	11,909	14,211
Net earnings attributable to redeemable noncontrolling interest	'	414
Other comprehensive income (loss) attributable to redeemable noncontrolling interest:	'	'
Foreign currency translation adjustment attributable to redeemable noncontrolling interest	'	-273
Comprehensive income attributable to redeemable noncontrolling interest	'	141
Comprehensive income attributable to II-VI Incorporated	$11,909	$14,070

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities	'	'
Net earnings	$9,694	$13,132
Adjustments to reconcile net earnings to net cash provided by operating activities:	'	'
Depreciation	9,628	8,013
Amortization	2,208	1,058
Share-based compensation expense	4,050	3,460
Loss on foreign currency remeasurements and transactions	922	216
Earnings from equity investment	-257	-365
Deferred income taxes	-502	-205
Excess tax benefits from share-based compensation expense	-361	-387
Increase (decrease) in cash from changes in:	'	'
Accounts receivable	4,248	6,379
Inventories	2,307	3,271
Accounts payable	1,559	-6,160
Income taxes	-3,583	-430
Other operating net assets	-5,526	-4,797
Net cash provided by operating activities	24,387	23,185
Cash Flows from Investing Activities	'	'
Additions to property, plant & equipment	-6,573	-5,929
Purchase of business, net of cash acquired	-90,601	'
Payment of option to acquire business	-5,000	'
Other investing activities	'	42
Net cash used in investing activities	-102,174	-5,887
Cash Flows from Financing Activities	'	'
Proceeds from borrowings	103,000	6,000
Payments on borrowings	-6,000	-1,000
Payment on earnout arrangement	-2,200	'
Payment of redeemable noncontrolling interest	-8,789	'
Proceeds from exercises of stock options	2,498	1,083
Purchases of treasury stock	'	-5,899
Payment of deferred financing costs	-950	'
Minimum tax withholding requirements	-718	-137
Excess tax benefits from share-based compensation expense	361	387
Net cash provided by financing activities	87,202	434
Effect of exchange rate changes on cash and cash equivalents	359	-65
Net increase in cash and cash equivalents	9,774	17,667
Cash and Cash Equivalents at Beginning of Period	185,433	134,944
Cash and Cash Equivalents at End of Period	195,207	152,611
Cash paid for interest	514	32
Cash paid for income taxes	5,092	4,560
Non cash transactions:	'	'
Purchase of business - holdback amount recorded in other accrued liabilities	2,000	'
Purchase of business - holdback amount recorded in other liabilities	$6,000	'

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
In Thousands
Beginning Balance at Jun. 30, 2013	$636,108	$194,284	$15,600	$482,878	($56,654)
Beginning Balance, shares at Jun. 30, 2013	'	70,223	'	'	-8,012
Shares issued under share-based compensation plans (in shares)	'	459	'	'	'
Shares issued under share-based compensation plans	2,498	2,498	'	'	'
Minimum tax withholding requirements, (in shares)	'	'	'	'	-37
Minimum tax withholding requirements	-718	'	'	'	-718
Share-based compensation expense	4,050	4,050	'	'	'
Net earnings	9,694	'	'	9,694	'
Treasury stock in deferred compensation plan, (in shares)	'	'	'	'	-91
Treasury stock under deferred compensation arrangements	'	1,790	'	'	-1,790
Excess tax benefits from share-based compensation	361	361	'	'	'
Foreign currency translation adjustments	2,215	'	2,215	'	'
Ending Balance at Sep. 30, 2013	$654,208	$202,983	$17,815	$492,572	($59,162)
Ending Balance, Shares at Sep. 30, 2013	'	70,682	'	'	-8,140

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Sep. 30, 2013
Basis of Presentation	'
	Note 1.	Basis of Presentation
	The condensed consolidated financial statements of II-VI Incorporated (sometimes referred to herein as “II-VI” or the “Company”) for the three months ended September 30, 2013 and 2012 are unaudited. In the opinion of management, all adjustments considered necessary for a fair presentation for the periods presented have been included. All adjustments are of a normal recurring nature unless disclosed otherwise. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s annual report on Form 10-K for the year ended June 30, 2013. The consolidated results of operations for the three months ended September 30, 2013 are not necessarily indicative of the results to be expected for the full fiscal year. The June 30, 2013 Condensed Consolidated Balance Sheet information was derived from the Company’s audited financial statements.
	In conjunction with the acquisition of Oclaro, Inc.’s Switzerland-based semiconductor laser business on September 12, 2013, the Company has established a new reporting segment “Active Optical Products” which will report the operating results of the Company’s recently acquired business.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Sep. 30, 2013
Recent Accounting Pronouncements	'
	Note 2.	Recent Accounting Pronouncements
	In March 2013, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update related to a parent’s accounting for the cumulative translation adjustment upon de-recognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. The update clarifies the applicable guidance under current U.S. GAAP for the release of the cumulative translation adjustment upon a reporting entity’s de-recognition of a subsidiary or group of assets within a foreign entity or part or all of its investment in a foreign entity. The update requires a reporting entity, which either sells a part or all of its investment in a foreign entity or ceases to have a controlling financial interest in a subsidiary or group of assets within a foreign entity, to release any related cumulative translation adjustment into net income. This update is effective prospectively for fiscal years beginning after December 15, 2013 and will be effective for the Company beginning in the first quarter of fiscal year 2015. The adoption of this standard is not expected to have a significant impact on the Company’s consolidated financial statements.
	In February 2013, the FASB issued an accounting standards update related to disclosure requirements of reclassifications out of accumulated other comprehensive income. The adoption of the guidance requires the Company to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, the Company is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified from each component of accumulated other comprehensive income and the income statement line items affected by the reclassification. This update was effective for the Company beginning in the first quarter of fiscal year 2014 and did not have a significant impact on the Company’s consolidated financial statements.

Acquisitions

Acquisitions	3 Months Ended
	Sep. 30, 2013
Acquisitions	'
	Note 3.	Acquisitions
	Oclaro’s Inc. Switzerland-Based Semiconductor Laser Business
	In September 2013, the Company acquired all of the outstanding shares of Oclaro Switzerland GmbH, a limited liability company formed under the laws of the Swiss confederation, as well as certain additional assets of Oclaro, Inc. used in the semiconductor laser business. The total consideration consisted of $90.6 million, net of cash acquired of $1.7 million, a $6.0 million holdback amount by the Company for 15 months to address any post-closing adjustments or claims, and a $2.0 million holdback amount for potential post-closing working capital adjustments. The Company will operate the business as II-VI Laser Enterprise GmbH (“Laser Enterprise”) and will include it in the Company’s new operating segment, Active Optical Products. Laser Enterprise is a manufacturer of high-power semiconductor laser components enabling fiber and direct diode laser systems for material processing, medical, consumer and printing applications. In addition, the segment manufactures pump lasers for optical amplifiers for both terrestrial and submarine applications and vertical cavity surface emitting lasers (VCSELS) for optical navigation, optical interconnects and optical sensing applications. Due to the timing of the acquisition, the Company is still in the process of completing its fair market valuation, including the valuation of certain tangible and intangible assets as well as deferred income taxes. The purchase price of the Laser Enterprise acquisition is summarized as follows ($000):
	Net cash paid at acquisition date		$	90,601
	Holdback amount recorded in Other accrued liabilities			2,000
	Holdback amount recorded in Other liabilities			6,000
	Purchase price		$	98,601
	The following table presents the preliminary allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition, as the Company intends to finalize its accounting for the acquisition of Laser Enterprise during fiscal year 2014 ($000):
	Assets
	Inventories		$	27,214
	Prepaid and other assets			1,006
	Deferred income taxes			2,376
	Property, plant & equipment			28,068
	Intangible assets			32,593
	Goodwill			39,041
	Total assets acquired		$	130,298
	Liabilities
	Accounts payable		$	2,214
	Deferred income taxes			13,467
	Accrued income taxes			2,714
	Other accrued liabilities			13,302
	Total liabilities assumed		$	31,697
	Net assets acquired		$	98,601
	The goodwill of $39.0 million is included in the Active Optical Products segment and is attributed to the expected synergies and the assembled workforce of Laser Enterprise. None of the goodwill is deductible for income tax purposes.
	The amount of revenues and net loss from operations of Laser Enterprise included in the Company’s Condensed Consolidated Statement of Earnings for the three months ended September 30, 2013 was $4.8 million and $0.5 million, respectively. In addition to those operating results, the Company incurred approximately $3.5 million of transaction expenses in conjunction with the acquisition of this business, which are recorded in selling, general and administrative expenses in the Condensed Consolidated Statement of Earnings for the three months ended September 30, 2013.
	Pro Forma Information
	The following unaudited pro forma consolidated results of operations for the three months ended September 30, 2013 and 2012 have been prepared as if the acquisition of Laser Enterprise had occurred on July 1, 2012, the beginning of the Company’s fiscal year 2013, which is the fiscal year prior to this acquisition. As a result, certain transaction related expenses of $3.3 million (net of tax) were only included in the earliest period presented below ($000 except per share data).
			Three Months Ended
			September 30,
			2013		2012
	Net revenues		$	168,845	$	157,577
	Net earnings attributable to II-VI Incorporated			12,342		9,264
	Basic earnings per share			0.2		0.15
	Diluted earnings per share			0.19		0.14
	The pro forma results are not necessarily indicative of what actually would have occurred if the transactions had occurred as described above, are not intended to be a projection of future results and do not reflect any cost savings that might be achieved from the combined operations.

Equity_Method_Investment

Equity Method Investment	3 Months Ended
	Sep. 30, 2013
Equity Method Investment	'
	Note 4.	Equity Method Investment
	The Company has an equity investment in Guangdong Fuxin Electronic Technology (“Fuxin”) based in Guangdong Province, China of 20.2%, which is accounted for under the equity method of accounting. The total carrying value of the investment recorded at September 30, 2013 and June 30, 2013 was $11.5 million and $11.2 million, respectively. During the quarter ended September 30, 2013 and 2012, the Company’s pro-rata share of earnings from this investment was $0.3 million and $0.4 million, respectively, which was recorded in Other expense (income), net in the Condensed Consolidated Statements of Earnings.

Inventories

Inventories	3 Months Ended
	Sep. 30, 2013
Inventories	'
	Note 5.	Inventories
	The components of inventories were as follows ($000):
			September 30,		June 30,
			2013		2013
	Raw materials		$	68,271	$	59,290
	Work in progress			56,815		43,895
	Finished goods			42,477		38,674
			$	167,563	$	141,859

Property_Plant_and_Equipment

Property, Plant and Equipment	3 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment	'
	Note 6.	Property, Plant and Equipment
	Property, plant and equipment consists of the following ($000):
			September 30,			June 30,
			2013			2013
	Land and land improvements		$	2,381		$	2,236
	Buildings and improvements			84,072			87,189
	Machinery and equipment			310,722			276,802
	Construction in progress			13,146			10,831
				410,321			377,058
	Less accumulated depreciation			(214,410	)		(206,386	)
			$	195,911		$	170,672

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	3 Months Ended
	Sep. 30, 2013
Goodwill and Other Intangible Assets	'
	Note 7.	Goodwill and Other Intangible Assets
	Changes in the carrying amount of goodwill are as follows ($000):
			Three Months Ended September 30, 2013
			Infrared		Near-			Military		Advanced			Active			Total
			Optics		Infrared			&		Products			Optical
					Optics			Materials		Group			Products
	Balance – beginning of period		$	9,677	$	60,269		$	30,712	$	22,694		$	—		$	123,352
	Goodwill acquired			—		—			—		—			39,041			38,994
	Goodwill adjustment			—		—			—		(516	)		—			(516	)
	Foreign currency translation			56		165			—		—			(47	)		221
	Balance – end of period		$	9,733	$	60,434		$	30,712	$	22,178		$	38,994		$	162,051
	The Company reviews the recoverability of goodwill at least annually and any time business conditions indicate a potential change in recoverability. The measurement of a potential impairment begins with comparing the current fair value of the Company’s reporting units to the recorded value (including goodwill). The Company uses a discounted cash flow model (“DCF model”) and a market analysis to determine the current fair value of its reporting units. A number of significant assumptions and estimates are involved in estimating the forecasted cash flows used in the DCF model, including markets and market shares, sales volume and pricing, costs to produce, working capital changes and income tax rates. Management considers historical experience and all available information at the time the fair values of the reporting units are estimated. However, actual fair values that could be realized could differ from those used to evaluate the impairment of goodwill.
	In connection with the acquisition of Laser Enterprise in September 2013, the Company recorded the excess purchase price over the net assets of the business acquired as goodwill in the accompanying Condensed Consolidated Balance Sheet, based on the preliminary purchase price allocation.
	During the quarter ended September 30, 2013, the Company recorded an adjustment to the goodwill associated with the November 2012 acquisition of M Cubed. This adjustment related to a change in deferred income tax assets and was recorded in conjunction with the finalization and filing of the M Cubed final tax return.
	The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of September 30, 2013 and June 30, 2013 was as follows ($000):
			September 30, 2013							June 30, 2013
			Gross					Net		Gross						Net
			Carrying		Accumulated			Book		Carrying			Accumulated			Book
			Amount		Amortization			Value		Amount			Amortization			Value
	Patents		$	54,749	$	(11,343	)	$	43,406	$	39,659		$	(10,455	)	$	29,204
	Trademarks			17,872		(980	)		16,892		17,855			(963	)		16,892
	Customer Lists			69,769		(13,552	)		56,217		52,614			(12,189	)		40,425
	Other			2,094		(1,429	)		665		1,580			(1,400	)		180
	Total		$	144,484	$	(27,304	)	$	117,180	$	111,708		$	(25,007	)	$	86,701
	In conjunction with the acquisition of Laser Enterprise, the Company recorded $15.0 million of patents, $17.1 million of customer lists and $0.5 million related to non-compete agreements. These intangibles assets were recorded based on the Company’s preliminary purchase price allocation which is expected to be finalized during fiscal year 2014.
	Amortization expense recorded on the Company’s intangible assets was $2.2 million and $1.1 million, for the three months ended September 30, 2013 and 2012, respectively. The patents are being amortized over a range of 120 to 240 months with a weighted average remaining life of approximately 125 months. The customer lists are being amortized over a range of approximately 120 months to 192 months with a weighted average remaining life of approximately 126 months. The gross carrying amount of trademarks includes $16.4 million of acquired trade names with indefinite lives that are not amortized but tested annually for impairment or more frequently if a triggering event occurs. Included in the gross carrying amount and accumulated amortization of the Company’s intangible assets is the effect of foreign currency translation on that portion of the intangible assets relating to the Company’s German subsidiaries, Photop, AOFR Pty. Ltd. (“Photop AOFR”) and Laser Enterprise.
	At September 30, 2013, the estimated amortization expense for existing intangible assets for each of the five succeeding fiscal years is as follows ($000):
	Year Ending June 30,
	Remaining 2014		$	8,396
	2015			10,575
	2016			10,508
	2017			10,499
	2018			10,023

Debt

Debt	3 Months Ended
	Sep. 30, 2013
Debt	'
	Note 8.	Debt
	The components of debt for the periods indicated were as follows ($000):
			September 30,		June 30,
			2013		2013
	Line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively		$	108,000	$	111,000
	Term loan, interest at LIBOR, as defined, plus 1.25%			100,000		—
	Yen denominated line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively			3,072		3,036
	Total debt			211,072		114,036
	Current portion of long-term debt			20,000		—
	Long-term debt, less current portion		$	191,072	$	114,036
	On September 10, 2013, the Company amended and restated its existing credit agreement. The Second Amended and Restated Credit Agreement (the “Amended Credit Facility”) provides for a revolving credit facility of $225 million (increased from $140 million), as well as a $100 million Term Loan. The Term Loan shall be re-paid in consecutive quarterly principal payments on the first business day of each January, April, July and October, with the first payment commencing on October 1, 2013, as follows: (i) twenty consecutive quarterly installments of $5 million and (ii) a final installment of all remaining principal due and payable on the maturity date. The Amended Credit Facility is unsecured, but is guaranteed by each existing and subsequently acquired or organized wholly-owned domestic subsidiary of the Company. The Company has the option to request an increase to the size of the Amended Credit Facility in an aggregate additional amount not to exceed $100 million. The Amended Credit Facility has a five-year term through September 2018 and has an interest rate of LIBOR, as defined in the agreement, plus 0.75% to 1.75% based on the Company’s ratio of consolidated indebtedness to consolidated EBITDA. Additionally, the facility is subject to certain covenants, including those relating to minimum interest coverage and maximum leverage ratios. As of September 30, 2013, the Company was in compliance with all financial covenants.
	In conjunction with entering into the Amended Credit Facility, the Company incurred approximately $1.0 million of deferred financing costs which are being amortized over the term of the agreement. As a result of the overall increase in borrowing capacity, existing deferred financing costs of $0.5 million are also being amortized over the term of the Amended Credit Facility.
	The Company’s Yen denominated line of credit is a 500 million Yen facility that has a five-year term through June 2016 and has an interest rate equal to LIBOR, as defined in the loan agreement, plus 0.625% to 1.50%. At September 30, 2013 and June 30, 2013, the Company had 300 million Yen borrowed. Additionally, the facility is subject to certain covenants, including those relating to minimum interest coverage and maximum leverage ratios. As of September 30, 2013, the Company was in compliance with all financial covenants.
	The Company had aggregate availability of $117.8 million and $29.8 million under its lines of credit as of September 30, 2013 and June 30, 2013, respectively. The amounts available under the Company’s lines of credit are reduced by outstanding letters of credit. As of September 30, 2013 and June 30, 2013, total outstanding letters of credit supported by the credit facilities were $1.3 million.
	The weighted average interest rate of total borrowings was 1.49% and 0.89% for the three months ended September 30, 2013 and 2012, respectively.
	Remaining annual principal payments under the Company’s credit facility as of September 30, 2013 were as follows:
	Period		Term		Yen Line		U.S.		Total
			Loan		of Credit		Dollar
							Line of
							Credit
	Year 1		$	20,000	$	—	$	—	$	20,000
	Year 2			20,000		—		—		20,000
	Year 3			20,000		3,072		—		23,072
	Year 4			20,000		—		—		20,000
	Year 5			20,000		—		108,000		128,000
	Total		$	100,000	$	3,072	$	108,000	$	211,072

Income_Taxes

Income Taxes	3 Months Ended
	Sep. 30, 2013
Income Taxes	'
	Note 9.	Income Taxes
	The Company’s year-to-date effective income tax rate at September 30, 2013 and 2012 was 25.1% and 24.2%, respectively. The variations between the Company’s effective tax rate and the U.S. statutory rate of 35.0% were primarily due to the consolidation of the Company’s foreign operations, which are subject to income taxes at lower statutory rates. A change in the mix of pretax income from these various tax jurisdictions could have a material impact on the Company’s effective tax rate.
	U.S. GAAP clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements and prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. As of September 30, 2013 and June 30, 2013, the gross unrecognized income tax benefit was $3.5 million and $3.2 million, respectively. The Company has classified the uncertain tax positions as noncurrent income tax liabilities, as the amounts are not expected to be paid within one year. If recognized, substantially all of the gross unrecognized tax benefits at September 30, 2013 would impact the effective tax rate. The Company recognizes interest and penalties related to uncertain tax positions in the income tax provision on the Condensed Consolidated Statements of Earnings. The amount of accrued interest and penalties included in the $3.5 million and $3.2 million of gross unrecognized income tax benefit at September 30, 2013 and June 30, 2013 was immaterial. Fiscal years 2010 to 2013 remain open to examination by the United States Internal Revenue Service, fiscal years 2008 to 2013 remain open to examination by certain state jurisdictions, and fiscal years 2005 to 2013 remain open to examination by certain foreign taxing jurisdictions.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Sep. 30, 2013
Earnings Per Share	'
	Note 10.	Earnings Per Share
	The following table sets forth the computation of earnings per share attributable to II-VI Incorporated for the periods indicated. Weighted average shares issuable upon the exercises of stock options and the release of performance and restricted shares that were not included in the calculation were approximately 304,000 and 380,000 for the three months ended September 30, 2013 and 2012, respectively, because they were anti-dilutive ($000 except per share data):
			Three Months Ended
			September 30,
			2013		2012
	Net earnings attributable to II-VI Incorporated		$	9,694	$	12,718
	Divided by:
	Weighted average shares			62,379		62,786
	Basic earnings attributable to II-VI Incorporated per common share		$	0.16	$	0.2
	Net earnings attributable to II-VI Incorporated		$	9,694	$	12,718
	Divided by:
	Weighted average shares			62,379		62,786
	Dilutive effect of common stock equivalents			1,568		1,413
	Diluted weighted average common shares			63,947		64,199
	Diluted earnings attributable to II-VI Incorporated per common share		$	0.15	$	0.2

Segment_Reporting

Segment Reporting	3 Months Ended
	Sep. 30, 2013
Segment Reporting	'
	Note 11.	Segment Reporting
	The Company reports its business segments using the “management approach” model for segment reporting. The Company determines its reportable business segments based on the way the chief operating decision maker organizes business segments within the Company for making operating decisions and assessing performance.
	In conjunction with the acquisition of Oclaro, Inc.’s Switzerland-based semiconductor laser business on September 12, 2013, the Company has established a new reporting segment “Active Optical Products” which will report the operating results of the Company’s recently acquired business.
	The Company has five reportable segments as of September 30, 2013. The Company’s chief operating decision maker receives and reviews financial information in this format. The Company evaluates business segment performance based upon reported business segment earnings, which is defined as earnings before income taxes, interest and other income or expense. The segments are managed separately due to the production requirements and facilities unique to each segment. The Company has the following reportable segments at September 30, 2013: (i) Infrared Optics, which consists of the Company’s infrared optics and material products businesses, HIGHYAG Lasertechnologies, GmbH (“HIGHYAG”) and certain remaining corporate activities, primarily corporate assets and capital expenditures; (ii) Near-Infrared Optics, which consists of Photop, Photop Aegis and Photop AOFR; (iii) Military & Materials, which consists of the Company’s LightWorks Optical Systems (formerly the Company’s EEO and LightWorks subsidiaries, “LWOS”), VLOC, Max Levy Autograph (“MLA”) and Pacific Rare Specialty Metals and Chemicals, Inc. (“PRM”); (iv) Advanced Products Group, which is comprised of the Company’s Marlow Industries, Inc. (“Marlow”), M Cubed, the Wide Bandgap Materials Group (“WBG”) and the Worldwide Materials Group (“WMG”), which is responsible for corporate research and development activities; and (v) Active Optical Products which consists of Laser Enterprise.
	The Infrared Optics segment is divided into geographic locations in the U.S., Singapore, China, Germany, Switzerland, Japan, Belgium, the U.K. and Italy. The Infrared Optics segment is directed by a general manager, while each geographic location is also directed by a general manager, and is further divided into production and administrative units that are directed by managers. The Infrared Optics segment designs, manufactures and markets optical and electro-optical components and materials sold under the II-VI brand name and used primarily in high-power CO2 lasers. The Infrared Optics segment also manufactures fiber-delivered beam delivery systems and processing tools for industrial lasers sold under the HIGHYAG brand name.
	The Near-Infrared Optics segment is located in the U.S., China, Vietnam, Australia, Germany, Japan, the U.K., Italy and Hong Kong. The Near-Infrared Optics segment is directed by a Corporate Executive Vice President and is further divided into production and administrative units that are directed by managers. The Near-Infrared Optics segment manufactures crystal materials, optics, microchip lasers and opto-electronic modules for use in optical communication networks and other diverse consumer and commercial applications sold under the Photop brand name and manufactures tunable optical devices and couplers and combiners required for high speed optical networks sold under the Photop Aegis and Photop AOFR brand names, respectively.
	The Military & Materials segment is located in the U.S. and the Philippines. The Military & Materials segment is directed by a Corporate Vice President, while each geographic location is directed by a general manager. The Military & Materials segment is further divided into production and administrative units that are directed by managers. The Military & Materials segment designs, manufactures and markets ultra-violet to infrared optical components and high-precision optical assemblies for military, medical and commercial laser and imaging applications under the LWOS and VLOC brand names and manufactures and markets micro-fine conductive mesh patterns for optical, mechanical, and ceramic components for applications under the MLA brand name. The segment also refines selenium metals for internal consumption and a rare earth element under the PRM brand name.
	The Advanced Products Group is located in the U.S., Vietnam, Japan, China and Germany and is directed by a Corporate Executive Vice President. In the Advanced Products Group segment, Marlow designs and manufactures thermoelectric cooling and power generation solutions for use in defense and space, optical communications, medical, consumer and industrial markets. M Cubed develops advanced ceramic materials and precision motion control products addressing the semiconductor, display, industrial and defense markets. WBG manufactures and markets single crystal silicon carbide substrates for use in solid-state lighting, wireless infrastructure, radio frequency (“RF”) electronics and power switching industries. WMG directs the corporate research and development initiatives.
	The Active Optical Products segment is located in Switzerland, China, the U.S. and the U.K. The Active Optical Products segment is directed by a Corporate Executive Vice President. The Active Optical Products segment manufacturers high-power semiconductor laser components enabling fiber and direct diode laser systems for material processing, medical, consumer and printing applications. In addition, the segment manufactures pump lasers for optical amplifiers for both terrestrial and submarine applications and VCSELS for optical navigation, optical interconnects and optical sensing applications.
	The accounting policies of the segments are the same as those of the Company. All of the Company’s corporate expenses are allocated to the segments. The Company evaluates segment performance based upon reported segment earnings, which is defined as earnings before income taxes, interest and other income or expense. Inter-segment sales and transfers have been eliminated.
	The following tables summarize selected financial information of the Company’s operations by segment ($000):
			Three Months Ended September 30, 2013
			Infrared		Near-		Military			Advanced			Active			Eliminations			Total
			Optics		Infrared		&			Products			Optical
					Optics		Materials			Group			Products
	Revenues		$	52,601	$	39,887	$	27,424		$	26,478		$	4,782		$	—		$	151,172
	Inter-segment revenues			274		285		1,871			1,520			—			(3,950	)		—
	Segment earnings (loss)			10,844		3,089		3,424			314			(4,184	)		—			13,487
	Interest expense			—		—		—			—			—			—			(483	)
	Other expense, net			—		—		—			—			—			—			(67	)
	Income taxes			—		—		—			—			—			—			(3,243	)
	Net earnings			—		—		—			—			—			—			9,694
	Depreciation and amortization			2,134		4,611		2,079			2,487			525			—			11,836
	Segment assets			237,395		317,044		133,130			176,964			134,985			—			999,518
	Expenditures for property, plant and equipment			1,891		2,528		1,128			831			195			—			6,573
	Equity investment			—		—		—			11,461			—			—			11,461
	Goodwill			9,733		60,434		30,712			22,178			38,994			—			162,051
			Three Months Ended September 30, 2012
			Infrared		Near-		Military			Advanced			Eliminations			Total
			Optics		Infrared		&			Products
					Optics		Materials			Group
	Revenues		$	51,556	$	40,646	$	23,935		$	16,155		$	—		$	132,292
	Inter-segment revenues			500		332		1,540			1,184			(3,556	)		—
	Segment earnings (loss)			11,842		7,722		(2,148	)		(822	)		—			16,594
	Interest expense			—		—		—			—			—			(36	)
	Other income, net			—		—		—			—			—			761
	Income taxes			—		—		—			—			—			(4,187	)
	Net earnings			—		—		—			—			—			13,132
	Depreciation and amortization			2,063		4,287		1,487			1,234			—			9,071
	Expenditures for property, plant and equipment			1,376		1,409		1,330			1,814			—			5,929

ShareBased_Compensation

Share-Based Compensation	3 Months Ended
	Sep. 30, 2013
Share-Based Compensation	'
	Note 12.	Share-Based Compensation
	The Board of Directors adopted the II-VI Incorporated 2012 Omnibus Incentive Plan (the “Plan”) which was approved by the shareholders of the Company. The Plan provides for the grant of non-qualified stock options, stock appreciation rights, restricted share awards, restricted share units, deferred share awards, performance share awards and performance share units to employees, officers and directors of the Company. The Company records share-based compensation expense for these awards in accordance with U.S. GAAP, which requires the recognition of the fair value of share-based compensation in net earnings. The Company recognizes the share-based compensation expense over the requisite service period of the individual grantees, which generally equals the vesting period.
	During the three months ended September 30, 2013 and 2012, the Company recorded $4.4 million and $3.6 million, respectively, of share-based compensation expense in its Condensed Consolidated Statements of Earnings, which was allocated approximately 20% to cost of goods sold and 80% to selling, general and administrative expense based on the employee classification of the grantees. Share-based compensation expense for the periods indicated was as follows ($000):
			Three Months Ended			Three Months Ended
			September 30, 2013			September 30, 2012
	Stock Options and Cash-Based Stock Appreciation Rights		$	1,960		$	1,589
	Restricted Share Awards and Cash-Based Restricted Share Unit Awards			1,514			1,061
	Performance Share Awards and Cash-Based Performance Share Unit Awards			962			976
			$	4,436		$	3,626
	Stock Options and Stock Appreciation Rights:
	The Company utilizes the Black-Scholes valuation model for estimating the fair value of these awards. During the three months ended September 30, 2013 and 2012, the weighted-average fair values of awards granted under the Plan were $9.16 and $8.49 per award, respectively, using the following assumptions:
			Three Months Ended			Three Months Ended
			September 30, 2013			September 30, 2012
	Risk free interest rate			1.79	%		0.93	%
	Expected volatility			49	%		49	%
	Expected life of options			5.89 years			5.65 years
	Dividend yield			None			None
	The risk-free interest rate is derived from the average U.S. Treasury Note rate during the period, which approximates the rate in effect at the time of grant related to the expected life of the awards. The risk free interest rate shown above is the weighted average rate for all awards granted during the each respective period. Expected volatility is based on the historical volatility of the Company’s Common Stock over the period commensurate with the expected life of the awards. The expected life calculation is based on the observed time to post-vesting exercise and/or forfeitures of awards by our employees. The dividend yield of zero is based on the fact that the Company has never paid cash dividends and has no current intention to pay cash dividends in the future. The estimated annualized forfeitures are based on the Company’s historical experience of award cancellations pre-vesting and are estimated at a rate of 16%. The Company will record additional expense in future periods if the actual forfeiture rate is lower than estimated, and will adjust expense in future periods if the actual forfeitures are higher than estimated.
	Restricted Share Awards and Restricted Share Units:
	The restricted share awards and units compensation expense was calculated based on the number of shares or units expected to be earned by the grantees multiplied by the stock price at the date of grant and is being recognized over the vesting period. Generally, the restricted share awards and units have a three year cliff-vesting provision and an estimated forfeiture rate of 7.5%.
	Performance Share Awards and Performance Share Units:
	The Compensation Committee of the Board of Directors of the Company has granted certain named executive officers and employees performance share awards and units under the Plan. As of September 30, 2013, the Company had outstanding grants covering performance periods ranging from 24 to 48 months. These awards are intended to provide continuing emphasis on specified financial performance goals that the Company considers important contributors to long-term shareholder value. These awards are payable only if the Company achieves specified levels of financial performance during the performance periods. The performance share awards and units compensation expense is calculated based on the estimated number of shares or units expected to be earned multiplied by the stock price at the date of grant.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Sep. 30, 2013
Fair Value of Financial Instruments	'
	Note 13.	Fair Value of Financial Instruments
	The FASB defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous markets for the asset and liability in an orderly transaction between market participants at the measurement date. The Company estimates fair value of its financial instruments utilizing an established three-level hierarchy in accordance with U.S. GAAP. The hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date as follows:
	•		Level 1 –		Valuation is based upon unadjusted quoted prices for identical assets or liabilities in active markets.
	•		Level 2 –		Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instruments.
	•		Level 3 –		Valuation is based upon other unobservable inputs that are significant to the fair value measurements.
	The classification of fair value measurements within the hierarchy is based upon the lowest level of input that is significant to the measurement. At September 30, 2013, the Company had foreign currency forward contracts recorded at fair value. The fair values of these instruments were measured using valuations based upon quoted prices for similar assets and liabilities in active markets (Level 2) and are valued by reference to similar financial instruments, adjusted for credit risk and restrictions and other terms specific to the contracts. At September 30, 2013, the Company had a contingent earnout arrangement related to the acquisition of LightWorks recorded at fair value. The LightWorks earnout arrangement provides up to a maximum of $4.2 million of additional cash payments to the former shareholders based upon LightWorks achieving certain agreed upon financial targets for revenues and customer orders in calendar year 2013, which if earned, would be paid no later than March 2014. As of September 30, 2013, the Company has made total earnout payments of $2.2 million for the customer order portion of the earnout arrangement which was achieved at 100% during July of 2013. The Company and has recorded the fair value of the remaining revenue earnout arrangement of $1.1 million in Other accrued liabilities in the Condensed Consolidated Balance Sheet. The fair value of the earnout arrangement was based on significant inputs not observable in the market and represents a Level 3 measurement as defined by U.S. GAAP. The Company uses the income approach in measuring the fair value of the earnout arrangement, which assumed a probability of 55% for the revenue earnout. The impact on fair value of discounting the revenue earnout arrangement was not significant as the earnout period ends on December 31, 2013 and is expected to be paid in March 2014. There were no fair value remeasurements recorded on the earnout arrangement during the three months ended September 30, 2013.
	The following table provides a summary by level of the fair value of financial instruments that are measured on a recurring basis as of September 30, 2013 ($000):
			Fair Value Measurements at September 30, 2013 Using:
			September 30, 2013			Quoted		Significant		Significant
						Prices in		Other		Unobservable
						Active		Observable		Inputs
						Markets		Inputs		(Level 3)
						for		(Level 2)
						Identical
						Assets
						(Level 1)
	Liabilities:
	Foreign currency forward contracts		$	57			—		57		—
	Contingent earnout arrangement		$	1,100		$	—	$	—	$	1,100
			Fair Value Measurements at June 30, 2013 Using:
			June 30, 2013			Quoted		Significant		Significant
						Prices in		Other		Unobservable
						Active		Observable		Inputs
						Markets		Inputs		(Level 3)
						for		(Level 2)
						Identical
						Assets
						(Level 1)
	Liabilities:
	Contingent earnout arrangement		$	3,300		$	—	$	—	$	3,300
	Foreign currency forward contracts		$	174		$	—	$	174	$	—
	The Company’s policy is to report transfers into and out of Levels 1 and 2 of the fair value hierarchy at fair values as of the beginning of the period in which the transfers occur. There were no transfers in and out of Levels 1 and 2 of the fair value hierarchy during the three months ended September 30, 2013.
	The following table presents a reconciliation of the beginning and ending fair value measurements of the Company’s Level 3 contingent earnout arrangement related to the acquisition of LightWorks ($000):
			Significant
			Unobservable Inputs
			(Level 3)
	Balance at July 1, 2013		$	3,300
	Payments			(2,200	)
	Changes in fair value			—
	Balance at September 30, 2013		$	1,100
	The carrying value of Cash and cash equivalents, Accounts receivable and Accounts payable are considered Level 1 among the fair value hierarchy and approximate fair value because of the short-term maturity of those instruments. The Company’s borrowings are considered Level 2 among the fair value hierarchy and have variable interest rates and accordingly their carrying amounts approximate fair value.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Sep. 30, 2013
Derivative Instruments	'
	Note 14.	Derivative Instruments
	The Company, from time to time, purchases foreign currency forward exchange contracts, primarily in Japanese Yen, that permit it to sell specified amounts of these foreign currencies expected to be received from its export sales for pre-established U.S. dollar amounts at specified dates. These contracts are entered into to limit transactional exposure to changes in currency exchange rates of export sales transactions in which settlement will occur in future periods and which otherwise would expose the Company, on the basis of its aggregate net cash flows in respective currencies, to foreign currency risk.
	The Company has recorded the fair market value of these contracts in the Company’s condensed consolidated financial statements. These contracts had a total notional amount of $7.3 million and $4.7 million at September 30, 2013 and June 30, 2013, respectively. As of September 30, 2013, these forward contracts had expiration dates ranging from October 2013 through January 2014, with Japanese Yen denominations individually ranging from 170 million Yen to 200 million Yen. The Company does not account for these contracts as hedges as defined by U.S. GAAP and records the change in the fair value of these contracts in Other expense (income), net in the Condensed Consolidated Statements of Earnings as they occur. The fair value measurement takes into consideration foreign currency rates and the current creditworthiness of the counterparties to these contracts, as applicable, and is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instruments and thus represents a Level 2 measurement. These contracts are recorded in other accrued liabilities in the Company’s Condensed Consolidated Balance Sheets. The change in the fair value of these contracts for the three months ended September 30, 2013 and 2012 was insignificant

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
	Note 15.	Commitments and Contingencies
	The Company records a warranty reserve as a charge against earnings based on a percentage of sales utilizing actual warranty claims over the last twelve months. The following table summarizes the change in the carrying value of the Company’s warranty reserve, which is a component of Other accrued liabilities in the Company’s Condensed Consolidated Balance Sheets, as of and for the three months ended September 30, 2013 ($000):
			Three Months Ended
			September 30, 2013
	Balance – beginning of period		$	1,661
	Payments made during the period			(630	)
	Additional warranty liability recorded during the period			466
	Warranty liability assumed through acquisition of Laser Enterprise			1,037
	Balance – end of period		$	2,534

PostRetirement_Benefits

Post-Retirement Benefits	3 Months Ended
	Sep. 30, 2013
Post-Retirement Benefits	'
	Note 16.	Post-Retirement Benefits
	In connection with the Company’s acquisition of Laser Enterprise, the Company assumed the existing pension plan covering employees of our Zurich, Switzerland subsidiary which included an $8.9 million unfunded pension liability which was recorded as part of the preliminary purchase price allocation of Laser Enterprise. This unfunded pension liability is recorded in Other liabilities in the Condensed Consolidated Balance Sheet at September 30, 2013. Due to the timing of the acquisition, net periodic pension cost for three months ended September 30, 2013 was not significant. In addition, the Company made no contributions to the plan during the three months ended September 30, 2013.

Subsequent_Events

Subsequent Events	3 Months Ended
	Sep. 30, 2013
Subsequent Events	'
	Note 17.	Subsequent Events
	On November 1, 2013, the Company acquired the fiber amplifier and micro-optics business of Oclaro, Inc. (“the Amplifier Business”) in a transaction valued at $88.6 million. The Company had previously paid $5 million for an exclusive option to acquire the Amplifier Business which was recorded in Other assets in the Condensed Consolidated Balance Sheet at September 30, 2013. This $5.0 million payment will be applied against the total purchase price of $88.6 million. The remaining purchase price of $83.6 million consisted of an initial cash payment of $79.6 million and a $4.0 million holdback amount that is expected to be paid no later than December 31, 2014, subject to post-closing adjustments or claims. Due to the close proximity of this acquisition to the filing date of this Form 10-Q, the Company was unable to make certain financial statement disclosures related to the purchase price allocation of the Amplifier Business. For financial reporting purposes, this business will be included as part of the Company’s new operating segment, Active Optical Products.

Acquisitions_Tables

Acquisitions (Tables) (Oclaro Incorporated)	3 Months Ended
	Sep. 30, 2013
Oclaro Incorporated	'
Summary of Purchase Price	'
	The purchase price of the Laser Enterprise acquisition is summarized as follows ($000):
	Net cash paid at acquisition date	$	90,601
	Holdback amount recorded in Other accrued liabilities		2,000
	Holdback amount recorded in Other liabilities		6,000
	Purchase price	$	98,601
Allocation of Purchase Price of Assets Acquired and Liabilities Assumed at Date of Acquisition	'
	The following table presents the preliminary allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition, as the Company intends to finalize its accounting for the acquisition of Laser Enterprise during fiscal year 2014 ($000):
	Assets
	Inventories	$	27,214
	Prepaid and other assets		1,006
	Deferred income taxes		2,376
	Property, plant & equipment		28,068
	Intangible assets		32,593
	Goodwill		39,041
	Total assets acquired	$	130,298
	Liabilities
	Accounts payable	$	2,214
	Deferred income taxes		13,467
	Accrued income taxes		2,714
	Other accrued liabilities		13,302
	Total liabilities assumed	$	31,697
	Net assets acquired	$	98,601
Pro-forma Consolidated Results of Operations	'
	The following unaudited pro forma consolidated results of operations for the three months ended September 30, 2013 and 2012 have been prepared as if the acquisition of Laser Enterprise had occurred on July 1, 2012, the beginning of the Company’s fiscal year 2013, which is the fiscal year prior to this acquisition. As a result, certain transaction related expenses of $3.3 million (net of tax) were only included in the earliest period presented below ($000 except per share data).
		Three Months Ended
		September 30,
		2013		2012
	Net revenues	$	168,845	$	157,577
	Net earnings attributable to II-VI Incorporated		12,342		9,264
	Basic earnings per share		0.2		0.15
	Diluted earnings per share		0.19		0.14

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Sep. 30, 2013
Components of Inventories	'
	The components of inventories were as follows ($000):
		September 30,		June 30,
		2013		2013
	Raw materials	$	68,271	$	59,290
	Work in progress		56,815		43,895
	Finished goods		42,477		38,674
		$	167,563	$	141,859

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	3 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment	'
	Property, plant and equipment consists of the following ($000):
		September 30,			June 30,
		2013			2013
	Land and land improvements	$	2,381		$	2,236
	Buildings and improvements		84,072			87,189
	Machinery and equipment		310,722			276,802
	Construction in progress		13,146			10,831
			410,321			377,058
	Less accumulated depreciation		(214,410	)		(206,386	)
		$	195,911		$	170,672

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Sep. 30, 2013
Changes in Carrying Amount of Goodwill	'
	Changes in the carrying amount of goodwill are as follows ($000):
		Three Months Ended September 30, 2013
		Infrared		Near-			Military		Advanced			Active			Total
		Optics		Infrared			&		Products			Optical
				Optics			Materials		Group			Products
	Balance – beginning of period	$	9,677	$	60,269		$	30,712	$	22,694		$	—		$	123,352
	Goodwill acquired		—		—			—		—			39,041			38,994
	Goodwill adjustment		—		—			—		(516	)		—			(516	)
	Foreign currency translation		56		165			—		—			(47	)		221
	Balance – end of period	$	9,733	$	60,434		$	30,712	$	22,178		$	38,994		$	162,051
Gross Carrying Amount and Accumulated Amortization	'
	The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of September 30, 2013 and June 30, 2013 was as follows ($000):
		September 30, 2013							June 30, 2013
		Gross					Net		Gross						Net
		Carrying		Accumulated			Book		Carrying			Accumulated			Book
		Amount		Amortization			Value		Amount			Amortization			Value
	Patents	$	54,749	$	(11,343	)	$	43,406	$	39,659		$	(10,455	)	$	29,204
	Trademarks		17,872		(980	)		16,892		17,855			(963	)		16,892
	Customer Lists		69,769		(13,552	)		56,217		52,614			(12,189	)		40,425
	Other		2,094		(1,429	)		665		1,580			(1,400	)		180
	Total	$	144,484	$	(27,304	)	$	117,180	$	111,708		$	(25,007	)	$	86,701
Estimated Amortization Expense for Existing Intangible Assets for Each of Five Succeeding Years	'
	the estimated amortization expense for existing intangible assets for each of the five succeeding fiscal years is as follows ($000):
	Year Ending June 30,
	Remaining 2014	$	8,396
	2015		10,575
	2016		10,508
	2017		10,499
	2018		10,023

Debt_Tables

Debt (Tables)	3 Months Ended
	Sep. 30, 2013
Components of Debt	'
	The components of debt for the periods indicated were as follows ($000):
		September 30,		June 30,
		2013		2013
	Line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively	$	108,000	$	111,000
	Term loan, interest at LIBOR, as defined, plus 1.25%		100,000		—
	Yen denominated line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively		3,072		3,036
	Total debt		211,072		114,036
	Current portion of long-term debt		20,000		—
	Long-term debt, less current portion	$	191,072	$	114,036
Remaining Annual Amounts of Principal Payments	'
	Remaining annual principal payments under the Company’s credit facility as of September 30, 2013 were as follows:
	Period	Term		Yen Line		U.S.		Total
		Loan		of Credit		Dollar
						Line of
						Credit
	Year 1	$	20,000	$	—	$	—	$	20,000
	Year 2		20,000		—		—		20,000
	Year 3		20,000		3,072		—		23,072
	Year 4		20,000		—		—		20,000
	Year 5		20,000		—		108,000		128,000
	Total	$	100,000	$	3,072	$	108,000	$	211,072

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Sep. 30, 2013
Computation of Earnings Per Share	'
	The following table sets forth the computation of earnings per share attributable to II-VI Incorporated for the periods indicated. Weighted average shares issuable upon the exercises of stock options and the release of performance and restricted shares that were not included in the calculation were approximately 304,000 and 380,000 for the three months ended September 30, 2013 and 2012, respectively, because they were anti-dilutive ($000 except per share data):
		Three Months Ended
		September 30,
		2013		2012
	Net earnings attributable to II-VI Incorporated	$	9,694	$	12,718
	Divided by:
	Weighted average shares		62,379		62,786
	Basic earnings attributable to II-VI Incorporated per common share	$	0.16	$	0.2
	Net earnings attributable to II-VI Incorporated	$	9,694	$	12,718
	Divided by:
	Weighted average shares		62,379		62,786
	Dilutive effect of common stock equivalents		1,568		1,413
	Diluted weighted average common shares		63,947		64,199
	Diluted earnings attributable to II-VI Incorporated per common share	$	0.15	$	0.2

Segment_Reporting_Tables

Segment Reporting (Tables)	3 Months Ended
	Sep. 30, 2013
Financial Information of Company's Operation by Segment	'
	The following tables summarize selected financial information of the Company’s operations by segment ($000):
		Three Months Ended September 30, 2013
		Infrared		Near-		Military			Advanced			Active			Eliminations			Total
		Optics		Infrared		&			Products			Optical
				Optics		Materials			Group			Products
	Revenues	$	52,601	$	39,887	$	27,424		$	26,478		$	4,782		$	—		$	151,172
	Inter-segment revenues		274		285		1,871			1,520			—			(3,950	)		—
	Segment earnings (loss)		10,844		3,089		3,424			314			(4,184	)		—			13,487
	Interest expense		—		—		—			—			—			—			(483	)
	Other expense, net		—		—		—			—			—			—			(67	)
	Income taxes		—		—		—			—			—			—			(3,243	)
	Net earnings		—		—		—			—			—			—			9,694
	Depreciation and amortization		2,134		4,611		2,079			2,487			525			—			11,836
	Segment assets		237,395		317,044		133,130			176,964			134,985			—			999,518
	Expenditures for property, plant and equipment		1,891		2,528		1,128			831			195			—			6,573
	Equity investment		—		—		—			11,461			—			—			11,461
	Goodwill		9,733		60,434		30,712			22,178			38,994			—			162,051
		Three Months Ended September 30, 2012
		Infrared		Near-		Military			Advanced			Eliminations			Total
		Optics		Infrared		&			Products
				Optics		Materials			Group
	Revenues	$	51,556	$	40,646	$	23,935		$	16,155		$	—		$	132,292
	Inter-segment revenues		500		332		1,540			1,184			(3,556	)		—
	Segment earnings (loss)		11,842		7,722		(2,148	)		(822	)		—			16,594
	Interest expense		—		—		—			—			—			(36	)
	Other income, net		—		—		—			—			—			761
	Income taxes		—		—		—			—			—			(4,187	)
	Net earnings		—		—		—			—			—			13,132
	Depreciation and amortization		2,063		4,287		1,487			1,234			—			9,071
	Expenditures for property, plant and equipment		1,376		1,409		1,330			1,814			—			5,929

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	3 Months Ended
	Sep. 30, 2013
Share-Based Compensation Expense by Award Type	'
	Share-based compensation expense for the periods indicated was as follows ($000):
		Three Months Ended			Three Months Ended
		September 30, 2013			September 30, 2012
	Stock Options and Cash-Based Stock Appreciation Rights	$	1,960		$	1,589
	Restricted Share Awards and Cash-Based Restricted Share Unit Awards		1,514			1,061
	Performance Share Awards and Cash-Based Performance Share Unit Awards		962			976
		$	4,436		$	3,626
Schedule of Fair Value Assumptions under Stock Option Plan	'
	During the three months ended September 30, 2013 and 2012, the weighted-average fair values of awards granted under the Plan were $9.16 and $8.49 per award, respectively, using the following assumptions:
		Three Months Ended			Three Months Ended
		September 30, 2013			September 30, 2012
	Risk free interest rate		1.79	%		0.93	%
	Expected volatility		49	%		49	%
	Expected life of options		5.89 years			5.65 years
	Dividend yield		None			None

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Sep. 30, 2013
Summary by Level of Fair Value of Financial Instruments Measured on Recurring Basis	'
	The following table provides a summary by level of the fair value of financial instruments that are measured on a recurring basis as of September 30, 2013 ($000):
		Fair Value Measurements at September 30, 2013 Using:
		September 30, 2013			Quoted		Significant		Significant
					Prices in		Other		Unobservable
					Active		Observable		Inputs
					Markets		Inputs		(Level 3)
					for		(Level 2)
					Identical
					Assets
					(Level 1)
	Liabilities:
	Foreign currency forward contracts	$	57			—		57		—
	Contingent earnout arrangement	$	1,100		$	—	$	—	$	1,100
		Fair Value Measurements at June 30, 2013 Using:
		June 30, 2013			Quoted		Significant		Significant
					Prices in		Other		Unobservable
					Active		Observable		Inputs
					Markets		Inputs		(Level 3)
					for		(Level 2)
					Identical
					Assets
					(Level 1)
	Liabilities:
	Contingent earnout arrangement	$	3,300		$	—	$	—	$	3,300
	Foreign currency forward contracts	$	174		$	—	$	174	$	—
Reconciliation of Beginning and Ending Fair-Value Measurements of Level Three Contingent Earnout Arrangement Related to Acquisition of LightWorks	'
	The following table presents a reconciliation of the beginning and ending fair value measurements of the Company’s Level 3 contingent earnout arrangement related to the acquisition of LightWorks ($000):
		Significant
		Unobservable Inputs
		(Level 3)
	Balance at July 1, 2013	$	3,300
	Payments		(2,200	)
	Changes in fair value		—
	Balance at September 30, 2013	$	1,100

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Sep. 30, 2013
Schedule of Change in Carrying Value of Warranty Reserve	'
	The following table summarizes the change in the carrying value of the Company’s warranty reserve, which is a component of Other accrued liabilities in the Company’s Condensed Consolidated Balance Sheets, as of and for the three months ended September 30, 2013 ($000):
		Three Months Ended
		September 30, 2013
	Balance – beginning of period	$	1,661
	Payments made during the period		(630	)
	Additional warranty liability recorded during the period		466
	Warranty liability assumed through acquisition of Laser Enterprise		1,037
	Balance – end of period	$	2,534

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
			Oclaro Incorporated	Oclaro Incorporated
Business Acquisition [Line Items]	'	'	'	'
Business acquisition, total consideration in cash net of cash acquired	$90,601,000	'	$90,601,000	'
Business acquisition, cash acquired	'	'	1,700,000	'
Business acquisition, post closing adjustments subject to hold-back for fifteen months	'	'	6,000,000	6,000,000
Business acquisition, post closing working capital adjustments	'	'	2,000,000	2,000,000
Business acquisition, goodwill	162,051,000	123,352,000	39,041,000	39,041,000
Business acquisition, revenue of acquired entity	'	'	'	4,800,000
Business acquisition, earnings of acquired entity	'	'	'	500,000
Business acquisition, transaction costs	'	'	3,500,000	3,500,000
Business acquisition, transaction costs, net of tax	'	'	$3,300,000	$3,300,000

Summary_of_Purchase_Price_Deta

Summary of Purchase Price (Detail) (USD $)	3 Months Ended	1 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
		Oclaro Incorporated
Business Acquisition [Line Items]	'	'
Net cash paid at acquisition date	$90,601,000	$90,601,000
Purchase of business - holdback amount recorded in other accrued liabilities	'	2,000,000
Purchase of business - holdback amount recorded in other liabilities	'	6,000,000
Purchase price	'	$98,601,000

Allocation_of_Purchase_Price_o

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed at Date of Acquisition (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Assets	'	'
Goodwill	$162,051	$123,352
Oclaro Incorporated	'	'
Assets	'	'
Inventories	27,214	'
Prepaid and other assets	1,006	'
Deferred income taxes	2,376	'
Property, plant & equipment	28,068	'
Intangible assets	32,593	'
Goodwill	39,041	'
Total assets acquired	130,298	'
Liabilities	'	'
Accounts payable	2,214	'
Deferred income taxes	13,467	'
Accrued income taxes	2,714	'
Other accrued liabilities	13,302	'
Total liabilities assumed	31,697	'
Net assets acquired	$98,601	'

Proforma_Consolidated_Results_

Pro-forma Consolidated Results of Operations (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'
Net revenues	$168,845	$157,577
Net earnings attributable to II-VI Incorporated	$12,342	$9,264
Basic earnings per share	$0.20	$0.15
Diluted earnings per share	$0.19	$0.14

Equity_Method_Investment_Addit

Equity Method Investment - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]	'	'	'
Total carrying value of investment	$11,461	'	'
Pro-rata share of earnings	257	365	'
Guangdong Fuxin Electronic Technology	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Equity method investment, ownership percentage	20.20%	'	'
Total carrying value of investment	11,500	'	11,200
Pro-rata share of earnings	$300	$400	'

Components_of_Inventories_Deta

Components of Inventories (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Inventory [Line Items]	'	'
Raw materials	$68,271	$59,290
Work in process	56,815	43,895
Finished goods	42,477	38,674
Inventories, Total	$167,563	$141,859

Property_Plant_and_Equipment_D

Property Plant and Equipment (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Land and improvements	$2,381	$2,236
Buildings and improvements	84,072	87,189
Machinery and equipment	310,722	276,802
Construction in progress	13,146	10,831
Property, Plant and Equipment, gross	410,321	377,058
Less accumulated depreciation	-214,410	-206,386
Property, Plant and Equipment, net	$195,911	$170,672

Changes_in_Carrying_Amount_of_

Changes in Carrying Amount of Goodwill (Detail) (USD $)	3 Months Ended					3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
		Infrared Optics	Near-Infrared Optics	Military & Materials	Military & Materials	Advanced Products Group	Active Optical Products
Goodwill [Line Items]	'	'	'	'	'	'	'
Balance - beginning of period	$123,352	$9,677	$60,269	$30,712	$30,712	$22,694	'
Goodwill acquired	38,994	'	'	'	'	'	39,041
Goodwill adjustment	-516	'	'	'	'	-516	'
Foreign currency translation	221	56	165	'	'	'	-47
Balance - end of period	$162,051	$9,733	$60,434	$30,712	$30,712	$22,178	$38,994

Gross_Carrying_Amount_and_Accu

Gross Carrying Amount and Accumulated Amortization (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$144,484	$111,708
Accumulated Amortization	-27,304	-25,007
Net Book Value	117,180	86,701
Patents	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	54,749	39,659
Accumulated Amortization	-11,343	-10,455
Net Book Value	43,406	29,204
Trade Names	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	17,872	17,855
Accumulated Amortization	-980	-963
Net Book Value	16,892	16,892
Customer Lists	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	69,769	52,614
Accumulated Amortization	-13,552	-12,189
Net Book Value	56,217	40,425
Other	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	2,094	1,580
Accumulated Amortization	-1,429	-1,400
Net Book Value	$665	$180

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization expense recorded on intangible assets	$2,200,000	$1,100,000
Oclaro Incorporated	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Business acquisition, intangible assets recorded	32,593,000	'
Patents	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'125 months	'
Patents | Oclaro Incorporated	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Business acquisition, intangible assets recorded	15,000,000	'
Patents | Minimum	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'120 months	'
Patents | Maximum	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'240 months	'
Customer Lists	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'126 months	'
Customer Lists | Oclaro Incorporated	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Business acquisition, intangible assets recorded	17,100,000	'
Customer Lists | Minimum	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'120 months	'
Customer Lists | Maximum	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Amortization period of patents and customer lists, in months	'192 months	'
Tradenames	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Carrying amount of trade names acquired	16,400,000	'
Noncompete Agreements | Oclaro Incorporated	'	'
Goodwill And Other Intangible Assets [Line Items]	'	'
Business acquisition, intangible assets recorded	$500,000	'

Estimated_Amortization_Expense

Estimated Amortization Expense for Existing Intangible Assets for Each of Five Succeeding Years (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'
Remaining 2014	$8,396
2015	10,575
2016	10,508
2017	10,499
2018	$10,023

Components_of_Debt_Detail

Components of Debt (Detail) (USD $)	Sep. 30, 2013	Sep. 10, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'	'
Line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively	$108,000	'	$111,000
Term loan, interest at LIBOR, as defined, plus 1.25%	100,000	100,000	'
Yen denominated line of credit, interest at LIBOR, as defined, plus 1.50% and 1.25%, respectively	3,072	'	3,036
Total	211,072	'	114,036
Current portion of long-term debt	20,000	'	'
Long-term debt, less current portion	$191,072	'	$114,036

Components_of_Debt_Parenthetic

Components of Debt (Parenthetical) (Detail) (London Interbank Offered Rate (LIBOR))	3 Months Ended
	Sep. 30, 2013	Jun. 30, 2013
Line of credit	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	1.50%	1.25%
Term Loans	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	1.25%	'
Yen denominated line of credit	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	1.50%	1.25%

Debt_Additional_Information_De

Debt - Additional Information (Detail)

1 Months Ended

3 Months Ended

1 Months Ended

1 Months Ended

3 Months Ended

Sep. 10, 2013

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Sep. 10, 2013

Sep. 10, 2013

Sep. 10, 2013

Sep. 10, 2013

Sep. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

USD ($)

USD ($)

USD ($)

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Revolving Credit Facility

Yen denominated line of credit

Yen denominated line of credit

Yen denominated line of credit

Yen denominated line of credit

Yen denominated line of credit

Yen Loan

USD ($)

Maximum

London Interbank Offered Rate (LIBOR)

London Interbank Offered Rate (LIBOR)

JPY (¥)

London Interbank Offered Rate (LIBOR)

London Interbank Offered Rate (LIBOR)

London Interbank Offered Rate (LIBOR)

London Interbank Offered Rate (LIBOR)

JPY (¥)

USD ($)

Maximum

Minimum

Maximum

Minimum

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit, maximum borrowing capacity

'

'

'

'

$225,000,000

'

'

'

'

'

'

'

'

'

Line of credit facility, prior borrowing capacity

'

'

'

'

140,000,000

'

'

'

'

'

'

'

'

'

Term loan

100,000,000

100,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Term loan, quarterly principal Payment

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Term loan, first quarterly principal payment commencement date

1-Oct-13

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, optional additional borrowing amount

'

'

'

'

'

100,000,000

'

'

'

'

'

'

'

'

Credit facility, term

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

Debt instrument, month and year of maturity

'

'

'

'

'2018-09

'

'

'

'2016-06

'

'

'

'

'

Debt instrument, rate added on variable rate

'

'

'

'

'

'

1.75%

0.75%

'

1.50%

1.25%

1.50%

0.63%

'

Financing cost incurred

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Deferred financing costs

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility

'

'

'

'

'

'

'

'

500,000,000

'

'

'

'

'

Amount borrowed

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

Available credit under lines of credit

'

117,800,000

'

29,800,000

'

'

'

'

'

'

'

'

'

'

Total outstanding letters of credit

'

$1,300,000

'

$1,300,000

'

'

'

'

'

'

'

'

'

'

Weighted average interest rate of total borrowings

'

1.49%

0.89%

'

'

'

'

'

'

'

'

'

'

'

Remaining_Annual_Amounts_of_Pr

Remaining Annual Amounts of Principal Payments of Credit Facility (Detail) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Year 1	$20,000	'
Year 2	20,000	'
Year 3	23,072	'
Year 4	20,000	'
Year 5	128,000	'
Total	211,072	114,036
Term Loans	'	'
Debt Instrument [Line Items]	'	'
Year 1	20,000	'
Year 2	20,000	'
Year 3	20,000	'
Year 4	20,000	'
Year 5	20,000	'
Total	100,000	'
Yen denominated line of credit	'	'
Debt Instrument [Line Items]	'	'
Year 3	3,072	'
Total	3,072	'
Line of credit	'	'
Debt Instrument [Line Items]	'	'
Year 5	108,000	'
Total	$108,000	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Income Taxes [Line Items]	'	'	'
Effective income tax rate	25.10%	24.20%	'
U.S. statutory rate	35.00%	'	'
Unrecognized tax benefits that would impact effective tax rate	$3.50	'	$3.20

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Weighted average Shares issuable upon the exercises of stock options excluded from the dilutive share calculation	304,000	380,000

Computation_of_Earnings_Per_Sh

Computation of Earnings Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Line Items]	'	'
Net earnings attributable to II-VI Incorporated	$9,694	$12,718
Weighted average shares	62,379	62,786
Basic earnings attributable to II-VI Incorporated per common share	$0.16	$0.20
Net earnings attributable to II-VI Incorporated	$9,694	$12,718
Weighted average shares	62,379	62,786
Dilutive effect of common stock equivalents	1,568	1,413
Diluted weighted average common shares	63,947	64,199
Diluted earnings attributable to II-VI Incorporated per common share	$0.15	$0.20

Financial_Information_of_Compa

Financial Information of Company's Operation by Segment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	$151,172	$132,292	'
Segment earnings (loss)	13,487	16,594	'
Interest expense	-483	-36	'
Other expense, net	-67	761	'
Income taxes	-3,243	-4,187	'
Net earnings	9,694	13,132	'
Depreciation and amortization	11,836	9,071	'
Segment assets	999,518	'	863,802
Expenditures for property, plant and equipment	6,573	5,929	'
Equity investment	11,461	'	'
Goodwill	162,051	'	'
Infrared Optics	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	52,601	51,556	'
Segment earnings (loss)	10,844	11,842	'
Depreciation and amortization	2,134	2,063	'
Segment assets	237,395	'	'
Expenditures for property, plant and equipment	1,891	1,376	'
Goodwill	9,733	'	'
Infrared Optics | Inter-segment revenues	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	274	500	'
Near-Infrared Optics	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	39,887	40,646	'
Segment earnings (loss)	3,089	7,722	'
Depreciation and amortization	4,611	4,287	'
Segment assets	317,044	'	'
Expenditures for property, plant and equipment	2,528	1,409	'
Goodwill	60,434	'	'
Near-Infrared Optics | Inter-segment revenues	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	285	332	'
Military & Materials	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	27,424	23,935	'
Segment earnings (loss)	3,424	-2,148	'
Depreciation and amortization	2,079	1,487	'
Segment assets	133,130	'	'
Expenditures for property, plant and equipment	1,128	1,330	'
Goodwill	30,712	'	'
Military & Materials | Inter-segment revenues	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	1,871	1,540	'
Advanced Products Group	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	26,478	16,155	'
Segment earnings (loss)	314	-822	'
Depreciation and amortization	2,487	1,234	'
Segment assets	176,964	'	'
Expenditures for property, plant and equipment	831	1,814	'
Equity investment	11,461	'	'
Goodwill	22,178	'	'
Advanced Products Group | Inter-segment revenues	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	1,520	1,184	'
Active Optical Products	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	4,782	'	'
Segment earnings (loss)	-4,184	'	'
Depreciation and amortization	525	'	'
Segment assets	134,985	'	'
Expenditures for property, plant and equipment	195	'	'
Goodwill	38,994	'	'
Eliminations | Inter-segment revenues	'	'	'
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]	'	'	'
Revenues	($3,950)	($3,556)	'

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Share based compensation expense	$4,436	$3,626
Percentage of share based compensation expense allocated to cost of sales	20.00%	'
Percentage of share based compensation expense allocated to selling, general and administrative expense	80.00%	'
Performance Stock and Performance Stock Unit | Minimum	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Performance share grant, period	'24 months	'
Performance Stock and Performance Stock Unit | Maximum	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Performance share grant, period	'48 months	'
Stock Options and Cash-Based Stock Appreciation Rights	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Share based compensation expense	1,960	1,589
Weighted-average fair values of stock options granted under the stock option Plan	$9.16	$8.49
Share based compensation, estimated forfeiture percentage	16.00%	'
Restricted Share Awards and Cash-Based Restricted Share Unit Awards	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Share based compensation expense	$1,514	$1,061
Share based compensation, estimated forfeiture percentage	7.50%	'
Share based compensation, vesting period years	'3 years	'

ShareBased_Compensation_Expens

Share-Based Compensation Expense by Award Type (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	$4,436	$3,626
Stock Options and Cash-Based Stock Appreciation Rights	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	1,960	1,589
Restricted Share Awards and Cash-Based Restricted Share Unit Awards	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	1,514	1,061
Performance Share Awards and Cash-Based Performance Share Unit Awards	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Share based compensation expense	$962	$976

Fair_Value_Assumptions_for_Sto

Fair Value Assumptions for Stock Option and Stock Appreciation Rights (Detail)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Fair Value Option [Line Items]	'	'
Risk free interest rate	1.79%	0.93%
Expected volatility	49.00%	49.00%
Expected life of options	'5 years 10 months 21 days	'5 years 7 months 24 days
Dividend yield	'	'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jul. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Business acquisition, additional cash earnout opportunities	$4.20	'
Fair value of earnout arrangement, probability	55.00%	'
Business acquisition, total earnout payments	2.2	'
Business acquisition, percentage of earnout arrangement achieved	'	100.00%
Business acquisition, fair value of remaining revenue earnout arrangement recorded in other accrued liabilities	$1.10	'

Summary_by_Level_of_Fair_Value

Summary by Level of Fair Value of Financial Instruments Measured on Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Liabilities:	'	'
Foreign currency forward contracts	$57	$174
Contingent earnout arrangement	1,100	3,300
Fair Value, Inputs, Level 2	'	'
Liabilities:	'	'
Foreign currency forward contracts	57	174
Fair Value, Inputs, Level 3	'	'
Liabilities:	'	'
Contingent earnout arrangement	$1,100	$3,300

Reconciliation_of_Beginning_an

Reconciliation of Beginning and Ending Fair-Value Measurements of Level Three Contingent Earnout Arrangement Related to Acquisition of LightWorks (Detail) (Fair Value, Measurements, Recurring, USD $)	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified			Fair Value, Inputs, Level 3
Business Acquisition, Contingent Consideration [Line Items]	'	'	'
Balance - beginning of period	$1,100	$3,300	$3,300
Payments	'	'	-2,200
Changes in fair value	'	'	'
Balance - end of period	$1,100	$3,300	$1,100

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail)	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified	USD ($)	USD ($)	Minimum	Maximum
			JPY (¥)	JPY (¥)
Derivative [Line Items]	'	'	'	'
Foreign currency forward exchange contracts, notional amount	$7.30	$4.70	'	'
Foreign currency forward exchange contracts maturity amount	'	'	¥ 170	¥ 200

Change_in_Caring_Value_of_Warr

Change in Caring Value of Warranty Reserve (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Contingencies And Commitments [Line Items]	'
Balance - beginning of period	$1,661
Payments made during the period	-630
Additional warranty liability recorded during the period	466
Warranty liability assumed through acquisition of Laser Enterprise	1,037
Balance - end of period	$2,534

PostRetirement_Benefits_Additi

Post-Retirement Benefits - Additional Information (Detail) (Unfunded Pension Plan, USD $)	Sep. 30, 2013
Unfunded Pension Plan	'
Defined Benefit Plan Disclosure [Line Items]	'
Pension liability	$8.90

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Nov. 01, 2013	Nov. 01, 2013
		Oclaro Incorporated	Subsequent Event	Subsequent Event
			Oclaro Incorporated	Oclaro Incorporated
				Initial Cash Payment
Subsequent Event [Line Items]	'	'	'	'
Business acquisition, transaction value	'	'	$88,600,000	'
Payment of option to acquire business	5,000,000	5,000,000	'	'
Business acquisition, remaining purchase price amount	'	'	83,600,000	79,600,000
Business acquisition, holdback amount	'	'	$4,000,000	'