Coherent (COHR) 10-K28 Aug 142014 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Jun. 30, 2014	Aug. 20, 2014	Dec. 31, 2013
Document And Entity Information [Line Items]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Jun-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'IIVI	'	'
Entity Registrant Name	'II-VI INC	'	'
Entity Central Index Key	'0000820318	'	'
Current Fiscal Year End Date	'--06-30	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	61,425,392	'
Entity Public Float	'	'	$940,573,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Current Assets	'	'
Cash and cash equivalents	$174,660	$185,433
Accounts receivable - less allowance for doubtful accounts of $1,852 and $1,479, respectively	136,723	107,173
Inventories	165,873	141,859
Deferred income taxes	11,118	10,794
Prepaid and refundable income taxes	4,440	4,543
Prepaid and other current assets	12,917	11,342
Total Current Assets	505,731	461,144
Property, plant & equipment, net	208,939	170,672
Goodwill	196,145	123,352
Other intangible assets, net	136,404	86,701
Investment	11,589	11,203
Deferred income taxes	4,038	2,696
Other assets	9,080	8,034
Total Assets	1,071,926	863,802
Current Liabilities	'	'
Current portion of long-term debt	20,000	'
Accounts payable	45,767	23,617
Accrued compensation and benefits	32,461	28,315
Accrued income taxes payable	4,584	7,697
Deferred income taxes	732	110
Other accrued liabilities	31,521	34,695
Total Current Liabilities	135,065	94,434
Long-term debt	221,960	114,036
Deferred income taxes	7,440	4,095
Other liabilities	32,418	15,129
Total Liabilities	396,883	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 - 70,935,098 shares and 70,223,286 shares, respectively	213,573	194,284
Accumulated other comprehensive income	19,406	15,600
Retained earnings	521,327	482,878
Shareholders' equity excluding treasury stock	754,306	692,762
Treasury stock, at cost, 9,481,963 shares and 8,011,733 shares, respectively	-79,263	-56,654
Total Shareholders' Equity	675,043	636,108
Total Liabilities and Shareholders' Equity	$1,071,926	$863,802

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Accounts receivable, allowance for doubtful accounts	$1,852	$1,479
Preferred stock, par value	$0	$0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0	$0
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	70,935,098	70,223,286
Treasury stock, shares	9,481,963	8,011,733

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Revenues	'	'	'
Domestic	$240,534	$241,045	$214,822
International	442,727	310,030	301,581
Total Revenues	683,261	551,075	516,403
Costs, Expenses and Other Expense (Income)	'	'	'
Cost of goods sold	456,545	347,558	315,056
Internal research and development	42,523	22,689	21,410
Selling, general and administrative	137,707	109,337	98,415
Interest expense	4,479	1,160	212
Other expense (income), net	-3,634	-7,155	-7,168
Total Costs, Expenses, and Other Expense (Income)	637,620	473,589	427,925
Earnings from Continuing Operations Before Income Taxes	45,641	77,486	88,478
Income Taxes	7,325	18,766	17,760
Earnings from Continuing Operations	38,316	58,720	70,718
Earnings (loss) from Discontinued Operation, net of income taxes	133	-6,789	-9,443
Net Earnings	38,449	51,931	61,275
Less: Net Earnings Attributable to Redeemable Noncontrolling Interest	'	1,118	969
Net Earnings Attributable to II-VI Incorporated	$38,449	$50,813	$60,306
Basic earnings (loss) attributable to II-VI Incorporated per common share:	'	'	'
Continuing operations	$0.62	$0.92	$1.10
Discontinued operation	'	($0.11)	($0.15)
Consolidated	$0.62	$0.81	$0.96
Diluted earnings (loss) attributable to II-VI Incorporated per common share:	'	'	'
Continuing operations	$0.60	$0.90	$1.08
Discontinued operation	'	($0.11)	($0.15)
Consolidated	$0.60	$0.80	$0.94

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Net earnings	$38,449	$51,931	$61,275
Other comprehensive income (loss):	'	'	'
Foreign currency translation adjustments	2,363	5,362	-2,878
Pension adjustment, net of taxes of $387	1,443	'	'
Comprehensive income	42,255	57,293	58,397
Less: Net Earnings Attributable to Redeemable Noncontrolling Interest	'	1,118	969
Other comprehensive income attributable to redeemable noncontrolling interest:	'	'	'
Foreign currency translation adjustments attributable to redeemable noncontrolling interest	'	-295	'
Comprehensive income attributable to redeemable noncontrolling interest	'	823	969
Comprehensive income attributable to II-VI Incorporated	$42,255	$56,470	$57,428

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Pension adjustment, net of taxes	$387

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
In Thousands, except Share data	Total	Common Stock	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Beginning Balance at Jun. 30, 2011	$521,273	$159,186	$13,116	$377,264	($28,293)
Beginning Balance, shares at Jun. 30, 2011	'	69,077,000	'	'	-6,394,000
Shares issued under stock incentive plans	2,738	2,738	'	'	'
Shares issued under stock incentive plans (in shares)	'	550,000	'	'	'
Net earnings attributable to II-VI Incorporated	60,306	'	'	60,306	'
Purchases of treasury stock	-4,988	'	'	'	-4,988
Purchases of treasury stock, shares	-301,716	'	'	'	-302,000
Treasury stock in deferred compensation plan	'	1,966	'	'	-1,966
Treasury stock in deferred compensation plan, (in shares)	'	'	'	'	-98,000
Foreign currency translation adjustment	-2,878	'	-2,878	'	'
Share-based compensation expense	11,584	11,584	'	'	'
Excess tax benefits from share-based compensation expense	821	821	'	'	'
Adjustment to redeemable noncontrolling interest	-2,630	'	'	-2,630	'
Ending Balance at Jun. 30, 2012	586,226	176,295	10,238	434,940	-35,247
Ending Balance, shares at Jun. 30, 2012	'	69,627,000	'	'	-6,794,000
Shares issued under stock incentive plans	4,104	4,104	'	'	'
Shares issued under stock incentive plans (in shares)	'	596,000	'	'	'
Net earnings attributable to II-VI Incorporated	50,813	'	'	50,813	'
Purchases of treasury stock	-19,978	'	'	'	-19,978
Purchases of treasury stock, shares	-1,141,022	'	'	'	-1,141,000
Treasury stock in deferred compensation plan	'	1,291	'	'	-1,291
Treasury stock in deferred compensation plan, (in shares)	'	'	'	'	-70,000
Foreign currency translation adjustment	5,362	'	5,362	'	'
Share-based compensation expense	11,959	11,959	'	'	'
Excess tax benefits from share-based compensation expense	635	635	'	'	'
Adjustment to redeemable noncontrolling interest	-2,875	'	'	-2,875	'
Minimum tax withholding requirements	-138	'	'	'	-138
Minimum tax withholding requirements, (in shares)	'	'	'	'	-7,000
Ending Balance at Jun. 30, 2013	636,108	194,284	15,600	482,878	-56,654
Ending Balance, shares at Jun. 30, 2013	'	70,223,000	'	'	-8,012,000
Shares issued under stock incentive plans	3,655	4,482	'	'	-827
Shares issued under stock incentive plans (in shares)	'	712,000	'	'	-44,000
Net earnings attributable to II-VI Incorporated	38,449	'	'	38,449	'
Purchases of treasury stock	-19,973	'	'	'	-19,973
Purchases of treasury stock, shares	-1,333,355	'	'	'	-1,333,000
Treasury stock in deferred compensation plan	'	1,809	'	'	-1,809
Treasury stock in deferred compensation plan, (in shares)	'	'	'	'	-93,000
Foreign currency translation adjustment	2,363	'	2,363	'	'
Share-based compensation expense	12,347	12,347	'	'	'
Pension other comprehensive income	1,443	'	1,443	'	'
Excess tax benefits from share-based compensation expense	651	651	'	'	'
Adjustment to redeemable noncontrolling interest	'	'	'	'	'
Ending Balance at Jun. 30, 2014	$675,043	$213,573	$19,406	$521,327	($79,263)
Ending Balance, shares at Jun. 30, 2014	'	70,935,000	'	'	-9,482,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities	'	'	'
Net earnings	$38,449	$51,931	$61,275
Adjustments to reconcile net earnings to net cash provided by operating activities:	'	'	'
(Earnings) loss from discontinued operation, net of tax	-133	6,789	9,443
Depreciation	41,805	34,135	30,072
Amortization	11,293	6,657	4,451
Share-based compensation expense	12,347	11,959	11,584
Loss (gain) on foreign currency transactions	700	1,244	-1,514
Gain on sale of equity investment	'	'	-1,021
Earnings from equity investments	-698	-1,048	-1,059
Deferred income taxes	-4,435	1,962	577
Impairment on property, plant and equipment	'	900	'
Excess tax benefits from share-based compensation expense	-651	-635	-821
Increase (decrease) in cash from changes in:	'	'	'
Accounts receivable	-28,486	5,441	-9,538
Inventories	12,794	1,969	-15,168
Accounts payable	19,813	-9,376	2,921
Income taxes payable	-6,282	4,351	2,824
Other operating net assets	-2,251	-5,807	-3,448
Continuing Operations	94,265	110,472	90,578
Discontinued Operation	1,197	-2,865	-2,509
Net cash provided by operating activities	95,462	107,607	88,069
Cash Flows from Investing Activities	'	'	'
Additions to property, plant & equipment	-29,220	-25,205	-42,797
Purchases of businesses, net of cash acquired	-177,676	-126,193	-46,141
Proceeds received from contractual settlement fromThailand flooding	'	4,797	'
Proceeds received from sale of equity method investment	'	2,138	3,478
Other investing activities	79	'	615
Continuing Operations	-206,817	-144,463	-84,845
Discontinued Operation	'	-68	-43
Net cash used in investing activities	-206,817	-144,531	-84,888
Cash Flows from Financing Activities	'	'	'
Proceeds on long-term borrowings	183,000	113,000	7,000
Payments on long-term borrowings	-55,000	-11,000	-14,295
Purchases of treasury stock	-19,973	-19,978	-4,988
Proceeds from exercises of stock options	4,358	4,104	2,658
Payments on cash earnout arrangement	-3,000	'	-6,000
Payment of redeemed noncontrolling interest	-8,789	'	'
Other financing activities	-1,514	-347	821
Net cash provided by (used in) financing activities	99,082	85,779	-14,804
Effect of exchange rate changes on cash and cash equivalents	1,500	1,634	-2,893
Net (decrease) increase in cash and cash equivalents	-10,773	50,489	-14,516
Cash and Cash Equivalents at Beginning of Period	185,433	134,944	149,460
Cash and Cash Equivalents at End of Period	174,660	185,433	134,944
Non cash transactions:	'	'	'
Capital lease obligation incurred on facility lease	11,636	'	'
Purchase of businesses - holdback amount recorded in other accrued liabilities	10,000	'	'
Purchase of business utilizing earnout consideration recorded in other current liabilities	'	3,300	'
Note receivable received from the sale of an equity investment	'	'	$2,022

Nature_of_Business_and_Summary

Nature of Business and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2014
Nature of Business and Summary of Significant Accounting Policies	'
	Note 1.	Nature of Business and Summary of Significant Accounting Policies
	Nature of Business. II-VI Incorporated and its subsidiaries (the “Company,” “we,” “us,” or “our”), a worldwide leader in engineered materials and opto-electronic components, is a vertically-integrated manufacturing company that creates and markets products for a diversified customer base including industrial manufacturing, optical communications, military, high-power electronics, semiconductor and thermo-electronics applications. The Company markets its products through its direct sales force and through distributors and agents.
	The Company uses certain uncommon materials and compounds to manufacture its products. Some of these materials are available from only one proven outside source. The continued high quality of these materials is critical to the stability of the Company’s manufacturing yields. The Company has not experienced significant production delays due to a shortage of materials. However, the Company does occasionally experience problems associated with vendor-supplied materials not meeting specifications for quality or purity. A significant failure of the Company’s suppliers to deliver sufficient quantities of necessary high-quality materials on a timely basis could have a material adverse effect on the Company’s results of operations.
	Principles of Consolidation. The consolidated financial statements include the accounts of the Company. All intercompany transactions and balances have been eliminated.

	Foreign Currency Translation. For II-VI Singapore Pte., Ltd. and its subsidiaries, II-VI Suisse S.a.r.l., Pacific Rare Specialty Metals & Chemicals, Inc. (“PRM”), Photop AOFR Pty. Ltd. (“AOFR”), II-VI Laser Enterprise and II-VI Network Solutions Division the functional currency is the United States (U.S.) dollar. The determination of the functional currency is made based on the appropriate economic and management indicators.
	For all other foreign subsidiaries, the functional currency is the local currency. Assets and liabilities of those operations are translated into U.S. dollars using period-end exchange rates while income and expenses are translated using the average exchange rates for the reporting period. Translation adjustments are recorded as accumulated other comprehensive income within shareholders’ equity in the accompanying Consolidated Balance Sheets.

	Cash and Cash Equivalents. The Company considers highly liquid investment instruments with an original maturity of three months or less to be cash equivalents. We place our cash and cash equivalents with high credit quality financial institutions and to date have not experienced credit losses in these instruments. Cash of foreign subsidiaries is on deposit at banks in China, Vietnam, Singapore, Japan, Switzerland, the Netherlands, Germany, the Philippines, Belgium, Italy, Hong Kong, Australia and the United Kingdom (“U.K.”).

	Accounts Receivable. The Company establishes an allowance for doubtful accounts based on historical experience and believes the collection of revenues, net of this allowance, is reasonably assured.
	The Company factored a portion of the accounts receivable of its Japan subsidiary during each of the years ended June 30, 2014 and 2013. Factoring is done with large banks in Japan. During the years ended June 30, 2014 and 2013, $12.7 million and $8.5 million, respectively, of accounts receivable had been factored. As of June 30, 2014 and 2013, the amount included in other accrued liabilities representing the Company’s obligation to the bank for these receivables factored with recourse was immaterial.

	Inventories. Inventories are valued at the lower of cost or market (“LCM”), with cost determined on the first-in, first-out basis. Inventory costs include material, labor and manufacturing overhead. Market cannot exceed the net realizable value (i.e., estimated selling price in the ordinary course of business less reasonably predicted costs of completion and disposal) and market shall not be less than net realizable value reduced by an allowance for an approximately normal profit margin. In evaluating LCM, management also considers, if applicable, other factors as well, including known trends, market conditions, currency exchange rates and other such issues. The Company records an inventory reserve as a charge against earnings for all products on hand more than twelve to eighteen months depending on the products that have not been sold to customers or cannot be further manufactured for sale to alternative customers. An additional reserve is recorded for product on hand that is in excess of product sold to customers over the same periods noted above. Inventories are presented net of reserves. The reserves totaled $12.0 million and $7.1 million at June 30, 2014 and 2013, respectively.

	Property, Plant and Equipment. Property, plant and equipment are carried at cost or fair market value upon acquisition. Major improvements are capitalized, while maintenance and repairs are generally expensed as incurred. The Company reviews its property, plant and equipment and other long-lived assets for impairment whenever events or circumstances indicate that the carrying amounts may not be recoverable. Depreciation for financial reporting purposes is computed primarily by the straight-line method over the estimated useful lives for building, building improvements and land improvements of 10 to 20 years and 3 to 12 years for machinery and equipment.

	Business Combinations. The Company accounts for business acquisitions by establishing the acquisition-date fair value as the measurement for all assets acquired and liabilities assumed. Certain provisions of accounting principles generally accepted in the United States (“U.S. GAAP”) prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.

	Goodwill. The excess purchase price over the fair market value allocated to identifiable tangible and intangible net assets of businesses acquired is reported as goodwill in the accompanying Consolidated Balance Sheets. The Company tests goodwill for impairment at least annually as of April 1, or when events or changes in circumstances indicate that goodwill might be impaired. The evaluation of impairment involves comparing the current fair value of the Company’s reporting units to the recorded value (including goodwill). The Company uses a discounted cash flow (“DCF”) model and a market analysis to determine the current fair value of the 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.

	The Company has the option to perform a qualitative assessment of goodwill prior to completing the two-step process described above to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. If the Company concludes that this is the case, it must perform the two-step process. Otherwise, the Company will forego the two-step process and does not need to perform any further testing.

	Intangibles. Intangible assets are initially recorded at their cost or fair market value upon acquisition. Finite-lived intangible assets are amortized for financial reporting purposes using the straight-line method over the estimated useful lives of the assets ranging from 7 to 18 years. Indefinite-lived intangible assets are not amortized but tested annually for impairment at April 1, or when events or changes in circumstances indicate that indefinite-lived intangible assets might be impaired.

	Equity Method Investments. 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 June 30, 2014 and June 30, 2013 was $11.6 million and $11.2 million, respectively. During the years ended June 30, 2014, 2013 and 2012, the Company’s pro-rata share of earnings from this investment was $0.7 million, $1.0 million and $1.3 million, respectively, and was recorded in other expense (income), net in the Consolidated Statements of Earnings. During the years ended June 30, 2014 and 2013, the Company recorded dividends from this equity investment of $0.3 million and $0.5 million for the years ended June 30, 2014 and 2013, respectively.

	Commitments and Contingencies. Liabilities for loss contingencies arising from claims, assessments, litigation, fines, and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred. Such accruals are adjusted as further information develops or circumstances change. The Company had no loss contingency liabilities at June 30, 2014 related to commitments and contingencies.

	Accrued Bonus and Profit Sharing Contribution. The Company records bonus and profit sharing estimates as a charge against earnings. These estimates are adjusted to actual based on final results of operations achieved during the fiscal year. Certain partial bonus amounts are paid on an interim basis, and the remainder is paid after the fiscal year end after the final determination of the applicable percentage or amounts. Other bonuses are paid annually.

	Warranty Reserve. The Company records a warranty reserve as a charge against earnings based on a percentage of revenues utilizing actual returns over a period that approximates historical warranty experience.

	Income Taxes. Deferred income tax assets and liabilities are determined based on the differences between the consolidated financial statement and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount more likely than not to be realized. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The amount of unrecognized tax benefits is adjusted for changes in facts and circumstances. For example, adjustments could result from significant amendments to existing tax law and the issuance of regulations or interpretations by the taxing authorities, new information obtained during a tax examination, or resolution of an examination. The Company believes that its estimates for uncertain tax positions are appropriate and sufficient to pay assessments that may result from examinations of its tax returns. The Company recognizes both accrued interest and penalties related to unrecognized tax benefits in income tax expense.

	Revenue Recognition. The Company recognizes revenues for product shipments when persuasive evidence of a sales arrangement exists, the product has been shipped or delivered, the sale price is fixed or determinable and collectability is reasonably assured. Title and risk of loss passes from the Company to its customer at the time of shipment in most cases with the exception of certain customers. For these customers, title does not pass and revenue is not recognized until the customer has received the product at its physical location.
	We establish an allowance for doubtful accounts and warranty reserves based on historical experience and believe the collection of revenues, net of these reserves, is reasonably assured. Our allowance for doubtful accounts and warranty reserve balances at June 30, 2014 were approximately $1.9 million and $2.9 million, respectively. Our reserve estimates have historically been proven to be materially correct based upon actual charges incurred.

	The Company’s revenue recognition policy is consistently applied across the Company’s segments, product lines and geographical locations. Further, we do not have post shipment obligations such as training or installation, customer acceptance provisions, credits and discounts, rebates and price protection, or other similar privileges. Our distributors and agents are not granted price protection. Our distributors and agents, which comprise less than 10% of consolidated revenues, have no additional product return rights beyond the right to return defective products covered by our warranty policy. Revenues generated from transactions other than product shipments are contract related and have historically accounted for less than 5% of consolidated revenues. We believe our revenue recognition practices have adequately considered the requirements under U.S. GAAP.

	Shipping and Handling Costs. Shipping and handling costs billed to customers are included in revenues. Shipping and handling costs incurred by the Company are included in selling, general and administrative expenses in the accompanying Consolidated Statements of Earnings. Total shipping and handling revenue and costs included in revenues and in selling, general and administrative expenses were immaterial for the fiscal years ended June 30, 2014, 2013 and 2012.

	Research and Development. Internal research and development costs and costs not related to customer and government funded research and development contracts are expensed as incurred.

	Share-Based Compensation. The Company follows U.S. GAAP in accounting for share-based compensation arrangements, which requires the recognition of the fair value of stock 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.

	Workers’ Compensation. The Company is self-insured for certain losses related to workers’ compensation for the majority of its U.S. employees. When estimating the self-insurance liability, the Company considers a number of factors, including historical claims experience, demographic and severity factors and valuations provided by independent third-party consultants. Periodically, management reviews its assumptions and valuations to determine the adequacy of the self-insurance liability.

	Accumulated Other Comprehensive Income. Accumulated other comprehensive income is a measure of all changes in shareholders’ equity that result from transactions and other economic events in the period other than transactions with owners. Accumulated other comprehensive income is a component of shareholders’ equity and consists of accumulated foreign currency translation adjustments of $18.0 million and $15.6 million, respectively, as of June 30, 2014 and 2013 and a pension adjustment of $1.4 million as of June 30, 2014.

	Fair Value Measurements. The Company applies fair value accounting for all financial assets and liabilities that are required to be recognized or disclosed at fair value in the financial statements. Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market in which the Company would transact, and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk.

	Estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

	Leases. The Company classifies leases as operating in accordance with the provisions of lease accounting. Rent expense under noncancelable operating leases with scheduled rent increases or rent holidays is accounted for on a straight-line basis over the lease term, beginning on the date of initial possession or the effective date of the lease agreement. The amount of the excess of straight-line rent expense over scheduled payments is recorded as a deferred liability. The current portion of unamortized deferred lease costs is included in other accrued liabilities and the long-term portion is included in other liabilities in the Consolidated Balance Sheets.

	Recently Issued Financial Accounting Standards

	In May 2014, the Financial Accounting Standards Board (the “FASB”) issued an Accounting Standards Update (“ASU”) which supersedes virtually all existing revenue recognition guidance under U.S. GAAP. The update's core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2016 and prohibits early adoption. The update allows for the use of either the retrospective or modified retrospective approach of adoption. Management is currently evaluating the available transition methods and the potential impact of adoption on the Company's Consolidated Financial Statements.
	In April 2014, the FASB issued an ASU that changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results. The new standard will be effective for annual periods beginning on or after December 15, 2014 with early adoption permitted and will be effective for the Company beginning in the first quarter of fiscal year 2016. The adoption of this standard is not expected to have a significant impact on the Company’s Consolidated Financial Statements.
	In July 2013, the FASB issued an ASU that changes how certain unrecognized tax benefits are to be presented on the consolidated balance sheet. This ASU clarified existing guidance to require that an unrecognized tax benefit or a portion thereof be presented in the consolidated balance sheet as a reduction to a deferred tax asset for a net operating loss (“NOL”) carryforward, similar tax loss, or a tax credit carryforward except when an NOL carryforward, similar tax loss, or tax credit carryforward is not available under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position. In such a case, the unrecognized tax benefit would be presented in the consolidated balance sheet as a liability. 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 March 2013, the FASB issued an ASU 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 ASU 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	12 Months Ended
Acquisitions	Jun. 30, 2014
Acquisitions	'
	Note 2.	Acquisitions
	Oclaro’s Fiber Amplifier and Micro-Optics Business
	In November 2013, the Company acquired certain assets of Oclaro used in the fiber amplifier and micro-optics business. The Company operates the business under the name II-VI Network Solutions Division (“Network Solutions”) and includes it with II-VI Laser Enterprise, GmbH (“Laser Enterprise”) in the Company’s new operating segment, Active Optical Products. Network Solutions is a manufacturer of fiber amplifiers and micro-optics used in the optical communications market. At closing, the Company paid $79.6 million in cash, plus a $4.0 million holdback amount for 14 months to address any post-closing adjustments or claims, and $5.0 million that was previously paid to Oclaro on September 12, 2013. The purchase price of the Network Solutions acquisition is summarized as follows ($000):

	Net cash paid at acquisition	$	79,600
	Cash previously paid		5,000
	Holdback amount recorded in Other liabilities		4,000
	Purchase price	$	88,600
	The following table presents the allocation of the purchase price of the assets acquired at the date of acquisition ($000):

	Assets
	Inventories	$	11,314
	Property, plant & equipment		9,700
	Intangible assets		32,000
	Goodwill		35,586
	Total assets acquired	$	88,600

	The goodwill of $35.6 million is included in the Active Optical Products segment and is attributed to the expected synergies and the assembled workforce of Network Solutions. All of the goodwill is deductible for income tax purposes.
	The amount of revenues and net loss from operations of Network Solutions included in the Company’s Consolidated Statement of Earnings were $53.4 million and $2.6 million, respectively, for the year ended June 30, 2014.
	Oclaro’s 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 used in the semiconductor laser business. The Company operates the acquired business under the name II-VI Laser Enterprise and includes 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. At closing, the Company paid $90.6 million of cash, 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 paid an additional $2.5 million for a working capital adjustment in accordance with the purchase agreement. The purchase price of the Laser Enterprise acquisition is summarized as follows ($000):

	Net cash paid at acquisition	$	90,601
	Cash paid for working capital adjustment		2,475
	Holdback amount recorded in Other liabilities		6,000
	Purchase price	$	99,076

	The following table presents the allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition ($000):

	Assets
	Inventories	$	26,071
	Prepaid and other assets		1,035
	Deferred income taxes		1,771
	Property, plant & equipment		30,184
	Intangible assets		28,900
	Goodwill		37,507
	Total assets acquired	$	125,468

	Liabilities
	Accounts payable	$	2,214
	Deferred income taxes		8,647
	Accrued income taxes		2,714
	Other accrued liabilities		12,817
	Total liabilities assumed	$	26,392
	Net assets acquired	$	99,076

	The goodwill of Laser Enterprise of $37.5 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 Consolidated Statement of Earnings for the year ended June 30, 2014 was $61.8 million and $17.4 million, respectively.
	In conjunction with the acquisitions of Network Solutions and Laser Enterprise, the Company expensed transactions costs of approximately $3.7 million, net of tax of $0.2 million, for the year ended June 30, 2014. These costs were recorded within selling, general and administrative expenses in the Consolidated Statements of Earnings.
	Pro Forma Information
	The following unaudited pro forma consolidated results of operations for fiscal year 2014 have been prepared as if the acquisitions of Network Solutions and Laser Enterprise had occurred on July 1, 2012, the beginning of the Company’s fiscal year 2013, which is the fiscal year prior to the acquisitions. As a result, certain transaction related expenses of $3.7 million (net of tax) for the year ended June 30, 2014 were only included in the earliest period presented below ($000 except per share data).

		Year Ended June 30,
		2014		2013
	Net revenues	$	734,912	$	732,474
	Net earnings attributable to II-VI Incorporated	$	47,054	$	44,693
	Basic earnings per share	$	0.76	$	0.72
	Diluted earnings per share	$	0.75	$	0.7

	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.

Discontinued_Operation

Discontinued Operation	12 Months Ended
Discontinued Operation	Jun. 30, 2014
Discontinued Operation	'
	Note 3.	Discontinued Operation
	During December 2013, the Company completed the discontinuance of its tellurium product line by exiting all business activities associated with this product. This product line was previously serviced by PRM and was included as part of the Military & Materials segment. Prior periods have been restated to present this product line on a discontinued operation basis. The revenues and earnings (losses) of the tellurium product line have been reflected as a discontinued operation for the periods presented as follows ($000):

	June 30,		2014		2013			2012
	$0
	Revenues		$	1,849	$	7,321		$	18,227
	Earnings (loss) from discontinued operation before income taxes			133		(6,789	)		(9,583	)
	Income tax benefit			-		-			140
	Earnings (loss) from discontinued operation net income taxes		$	133	$	(6,789	)	$	(9,443	)

Inventories

Inventories	12 Months Ended
Inventories	Jun. 30, 2014
Inventories	'
	Note 4.	Inventories
	The components of inventories, net of reserves, were as follows:

	June 30,		2014		2013
	$0
	Raw materials		$	71,949	$	59,290
	Work in process			44,739		43,895
	Finished goods			49,185		38,674
			$	165,873	$	141,859

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
Property, Plant and Equipment	Jun. 30, 2014
Property, Plant and Equipment	'
	Note 5.	Property, Plant and Equipment
	Property, plant and equipment consists of the following:

	June 30,		2014			2013
	$0
	Land and improvements		$	2,381		$	2,236
	Buildings and improvements			96,551			87,189
	Machinery and equipment			335,408			276,802
	Construction in progress			16,990			10,831
				451,330			377,058
	Less accumulated depreciation			(242,391	)		(206,386	)
			$	208,939		$	170,672


	Depreciation expense was $41.8 million, $34.1 million and $30.1 million for the fiscal years ended June 30, 2014, 2013 and 2012, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
Goodwill and Other Intangible Assets	Jun. 30, 2014
Goodwill and Other Intangible Assets	'
	Note 6.	Goodwill and Other Intangible Assets
	Goodwill represents the excess of the cost over the net tangible and identifiable intangible assets of acquired businesses. Identifiable intangible assets acquired in business combinations are recorded based upon fair market value at the date of acquisition.
	In connection with the two acquisitions completed in fiscal year 2014 and the acquisitions completed in fiscal year 2013, the Company recorded the excess purchase prices over the net assets of the businesses acquired as goodwill in the accompanying Consolidated Balance Sheets, based on the purchase price allocation. Changes in the carrying amount of goodwill were as follows:

		Year Ended June 30, 2014
					Near-			Military		Advanced			Active
		Infrared			Infrared			&		Products			Optical
		Optics			Optics			Materials		Group			Products			Total

	Balance-July 1, 2013	$	9,677		$	60,269		$	30,712	$	22,694		$	-		$	123,352
	Goodwill acquired		-			-			-		-			73,093			73,093
	Goodwill adjustment		-			-			-		(516	)		-			(516	)
	Foreign currency translation		77			139			-		-			-			216
	Balance-June 30, 2014	$	9,754		$	60,408		$	30,712	$	22,178		$	73,093		$	196,145

	During the year ended June 30, 2014, the Company recorded an adjustment to goodwill of $0.5 million associated with the November 2012 acquisition of M Cubed Technologies, Inc. (“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 income tax return.

		Year Ended June 30, 2013
					Near-			Military		Advanced
		Infrared			Infrared			&		Products
		Optics			Optics			Materials		Group			Total

	Balance-July 1, 2012	$	9,612		$	48,496		$	12,326	$	10,314		$	80,748
	Goodwill acquired		-			10,980			18,386		12,381			41,746
	Foreign currency translation		65			793			-		-			858
	Balance-June 30, 2013	$	9,677		$	60,269		$	30,712	$	22,694		$	123,352

	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 used a discounted cash flow (DCF) model and a market analysis to determine the current fair value of all its reporting units except for the Active Optical Products reporting unit. 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. The Company has the option to perform a qualitative assessment of goodwill to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. Due to the timing of the Company’s finalization of the current year acquisitions of Laser Enterprise and Network Solutions, a qualitative test was performed on the Active Optical Products segment during fiscal year ended 2014. As of April 1 of fiscal years 2014 and 2013, the Company completed its annual impairment tests of its reporting units. Based on the results of these analyses, the Company’s goodwill of $196.1 million as of June 30, 2014 and $123.4 million as of June 30, 2013 was not impaired.

	As the estimated fair value of the Near Infrared Optics reporting unit was approximately 9% greater than its carrying value, the Company has concluded that this reporting unit is at risk of not passing step one of future goodwill impairment tests. In the event of unfavorable changes to the existing assumptions used in the impairment test such as the weighted average cost of capital (discount rate), growth rates and market multiples as well as changes in our internal structure, the carrying value of the Company’s goodwill could be impaired. Although the Company believes that the current assumptions and estimates are reasonable, supportable and appropriate, the Near Infrared Optics reporting unit competes in a challenging environment with significant pricing pressure and rapidly changing technology and there can be no assurance that the estimates and assumptions made for purposes of the goodwill impairment test will prove to be accurate predictions of future performance.

	As a result of the July 1, 2014 segment realignment as described in Item 1 of this Annual Report on Form 10-K, the Company will reassign the Active Optical Products segment's existing goodwill balance to the new reporting units utilizing a relative fair value allocation approach in accordance with authoritative accounting guidance. As part of this reassignment, the Company may be required to review the recoverability of the carrying value of goodwill at the new reporting units.
	The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of June 30, 2014 and 2013 were as follows:

		Year Ended June 30, 2014								Year Ended June 30, 2013
		Gross						Net		Gross						Net
		Carrying			Accumulated			Book		Carrying			Accumulated			Book
		Amount			Amortization			Value		Amount			Amortization			Value

	Technology and patents	$	50,505		$	(14,474	)	$	36,031	$	39,659		$	(10,455	)	$	29,204
	Trademarks		17,870			(1,037	)		16,833		17,855			(963	)		16,892
	Customer lists		102,839			(19,448	)		83,391		52,614			(12,189	)		40,425
	Other		1,586			(1,437	)		149		1,580			(1,400	)		180
	Total	$	172,800		$	(36,396	)	$	136,404	$	111,708		$	(25,007	)	$	86,701


	Amortization expense recorded on the intangible assets for the fiscal years ended June 30, 2014, 2013 and 2012 was $11.3 million, $6.7 million, and $4.5 million, respectively. The technology and patents are being amortized over a range of 60 to 240 months with a weighted-average remaining life of approximately 118 months. The customer lists are being amortized over 120 to 192 months with a weighted-average remaining life of approximately 150 months. As a result of the completion of the valuations of our recent acquisitions of Laser Enterprise and Network Solutions, the Company recorded $10.8 million of technology and patents and $50.1 million of customer lists.
	In connection with past acquisitions, the Company acquired tradenames with indefinite lives. The carrying amount of these tradenames of $16.4 million is not amortized but tested annually for impairment. The Company completed its impairment test of these tradenames with indefinite lives in the fourth quarter of fiscal years 2014 and 2013. Based on the results of these tests, the tradenames were not impaired at June 30, 2014 or 2013.
	Included in the gross carrying amount and accumulated amortization of the Company’s patents, customer list and other component of intangible assets and goodwill is the effect of the foreign currency translation of the portion relating to the Company’s German subsidiaries, Photop and AOFR. The estimated amortization expense for existing intangible assets for each of the five succeeding years is as follows:

	Year Ending June 30,
	2015		$	11,716
	2016			11,619
	2017			11,609
	2018			11,140
	2019			10,715

Debt

Debt	12 Months Ended
	Jun. 30, 2014
Debt	'
	Note 7.	Debt
	The components of debt were as follows ($000):
	June 30,		2014			2013
	Line of credit, interest at LIBOR, as defined, plus 1.75% and		$	154,000		$	111,000
	1.25%, respectively
	Term loan, interest at LIBOR, as defined, plus 1.25%		$	85,000			-
	Yen denominated line of credit, interest at LIBOR, as defined,			2,960			3,036
	plus 0.625%
	Total debt			241,960			114,036
	Current portion of long-term debt			(20,000	)		-
	Long-term debt, less current portion		$	221,960		$	114,036



	In September 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 June 30, 2014, the Company was in compliance with all financial covenants under its Amended Credit Facility.

	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 at the time of the amendment 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%. Additionally, the facility is subject to certain covenants, including those relating to minimum interest coverage and maximum leverage ratios. As of June 30, 2014, the Company was in compliance with all covenants under the Yen facility.

	The Company had aggregate availability of $71.0 million and $29.8 million under its lines of credit as of June 30, 2014 and 2013, respectively. The amounts available under the Company’s lines of credit are reduced by outstanding letters of credit. As of June 30, 2014 and 2013, total outstanding letters of credit supported by the credit facilities were $1.9 million and $1.3 million, respectively.

	The weighted-average interest rate of total borrowings for the years ended June 30, 2014 and 2013 was 1.8% and 1.4%, respectively. The weighted-average of total borrowings for the fiscal years ended June 30, 2014 and 2013 was $222.6 million and $82.5 million, respectively.

	The Company has a line of credit facility with a Singapore bank which permits maximum borrowings in the local currency of approximately $0.3 million and $0.4 million for the fiscal years ended June 30, 2014 and 2013. Borrowings are payable upon demand with interest charged at the rate of 1.00% above the bank’s prevailing prime lending rate. The interest rate was 5.25% at June 30, 2014 and June 30, 2013. At June 30, 2014 and 2013, there were no outstanding borrowings under this facility.

	There are no interim maturities or minimum payment requirements related to the credit facilities before their respective expiration dates. Interest and commitment fees paid during the fiscal year ended June 30, 2014 and 2013 was $4.2 million and $1.1 million, respectively, and was immaterial for fiscal year 2012.

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Jun. 30, 2014
Income Taxes	'
	Note 8.	Income Taxes

	The components of income (loss) from continuing operations before income taxes were as follows:

	Year Ended June 30,		2014				2013				2012
	$0
	U.S. income (loss)		$	(2,863	)		$	19,253			$	16,025
	Non-U.S. income			48,504				58,233				72,453
	Total Earnings Before Tax		$	45,641			$	77,486			$	88,478





	The components of income tax expense (benefit) from continuing operations were as follows:

	Year Ended June 30,		2014				2013				2012
	$0
	Current:
	Federal			(1,067	)		$	2,759			$	283
	State		152					68				227
	Foreign			12,675				13,977				16,673
	Total Current		$	11,760			$	16,804			$	17,183
	Deferred:
	Federal			(16	)		$	1,721			$	3,409
	State		148					113				(356	)
	Foreign			(4,567	)			128				(2,476	)
	Total Deferred		$	(4,435	)		$	1,962			$	577
	Total Income Tax Expense		$	7,325			$	18,766			$	17,760

	Principal items comprising deferred income taxes were as follows:

	June 30,		2014				2013
	$0
	Deferred income tax assets
	Inventory capitalization		$	5,402			$	6,333
	Non-deductible accruals			1,926				1,930
	Accrued employee benefits			9,226				6,790
	Net-operating loss and credit carryforwards			21,976				22,849
	Share-based compensation expense			16,005				15,021
	Other			577				205
	Valuation allowances			(2,212	)			(2,885	)
	Total deferred income tax assets		$	52,900			$	50,243
	Deferred income tax liabilities
	Tax over book accumulated depreciation			(17,625	)		$	(16,988	)
	Intangible assets			(25,505	)			(21,561	)
	Other			(2,786	)			(2,409	)
	Total deferred income tax liabilities		$	(45,916	)		$	(40,958	)
	Net deferred income taxes		$	6,984			$	9,285

	The reconciliation of income tax expense at the statutory federal rate to the reported income tax expense is as follows:

	Year Ended June 30,		2014				%				2013			%			2012			%
	$0
	Taxes at statutory rate		$	15,974				35			$	27,120			35		$	30,967			35
	Increase (decrease) in taxes resulting from:
	State income taxes-net of federal benefit			254				1				168			-			(187	)		-
	Taxes on non U.S. earnings			(6,672	)			(15	)			(6,991	)		(9	)		(9,841	)		(11	)
	Settlement of unrecognized tax benefits			-				-				-			-			(842	)		(1	)
	Research and manufacturing incentive deductions			(2,190	)			(5	)			(1,458	)		(2	)		(2,079	)		(3	)
	Other			(41	)			-				(73	)		-			(258	)		-
			$	7,325				16			$	18,766			24		$	17,760			20

During the fiscal years ended June 30, 2014, 2013, and 2012, net cash paid by the Company for income taxes was $17.2 million, $11.9 million, and $13.2 million, respectively.
The cumulative amount of the Company’s foreign undistributed net earnings for which no deferred taxes have been provided was approximately $366 million at June 30, 2014. If the earnings of such foreign subsidiaries were not indefinitely reinvested, an additional deferred tax liability of approximately $74 million would have been required as of June 30, 2014. It is the Company’s intention to permanently reinvest undistributed earnings of its foreign subsidiaries; therefore, no provision has been made for future income taxes on the undistributed earnings of foreign subsidiaries, as they are considered indefinitely reinvested.
The sources of differences resulting in deferred income tax expense (benefit) from continuing operations and the related tax effect of each were as follows:

Year Ended June 30,		2014				2013				2012
$0
Depreciation and amortization		$	(3,581	)		$	(2,825	)		$	38
Inventory capitalization			646				84				(1,947	)
Net operating loss and credit carryforwards net of valuation		533					4,786				1,859
allowances		533					4,786				1,859
Share-based compensation expense			(984	)			(3,487	)			(2,442	)
Other			(1,049	)			3,404				3,069
		$	(4,435	)		$	1,962			$	577


The Company has the following gross operating loss carryforwards and tax credit carryforwards as of June 30, 2014:

Type		Amount				Expiration Date
$0
Tax credit carryforwards:
Federal research and development credits		$	4,117			June 2019-June 2034
State tax credits			2,827			June 2014-June 2029
Operating loss carryforwards:
Loss carryforwards - federal		$	36,124			June 2022-June 2029
Loss carryforwards - state			25,116			June 2014-June 2034
Loss carryforwards - foreign			9,427			June 2016-June 2022



The Company has recorded a valuation allowance against the majority of the foreign loss carryforwards and select state tax credit carryforwards. The Company’s federal loss carryforwards, federal research and development credit carryforwards, and certain state tax credits resulted from the Company’s acquisitions of Photop Aegis and M Cubed and are subject to various annual limitations under Section 382 of the Internal Revenue Code.
Changes in the liability for unrecognized tax benefits for the fiscal years ended June 30, 2014, 2013 and 2012 were as follows:

		2014				2013				2012
$0
Balance at Beginning of Year		$	3,181			$	2,850			$	4,744
Increases in current year tax positions			298				338				738
Increases in prior year tax positions		2					-				-
Decreases in prior year tax positions			-				(7	)			(41	)
Settlements			-				-				(1,788	)
Expiration of statute of limitations			(706	)			-				(803	)
Balance at End of Year		$	2,775			$	3,181			$	2,850

The Company classifies all estimated and actual interest and penalties as income tax expense. There was no interest and penalties within income tax expense for fiscal year 2014. During the fiscal years ended June 30, 2013 and 2012, the Company recognized $0.1 million of expense and $0.2 million of benefit, respectively, of interest and penalties within income tax expense. The Company had $0.2 million, $0.2 million, and $0.1 million of interest and penalties accrued at June 30, 2014, 2013, and 2012, respectively. The Company has classified the uncertain tax positions as non-current income tax liabilities as the amounts are not expected to be paid within one year. Including tax positions for which the Company determined that the tax position would not meet the more likely than not recognition threshold upon examination by the tax authorities based upon the technical merits of the position, the total estimated unrecognized tax benefit that, if recognized, would affect our effective tax rate was approximately $2.8 million and $3.2 million at June 30, 2014 and 2013, respectively. The Company expects a decrease of $1.4 million of unrecognized tax benefits during the next twelve months due to the expiration of statutes of limitation.
In December 2011, the Internal Revenue Service completed its examination of the Company’s federal income tax return for fiscal year 2009 with no significant findings. As a result, during the fiscal year ended June 30, 2012, the Company reversed certain unrecognized tax benefits from fiscal year 2009 and recognized an income tax benefit of approximately $0.8 million.
Fiscal years 2011 to 2014 remain open to examination by the Internal Revenue Service, fiscal years 2010 to 2014 remain open to examination by certain state jurisdictions, and fiscal years 2007 to 2014 remain open to examination by certain foreign taxing jurisdictions. The Company’s fiscal years 2011 and 2012 California state income tax returns are currently under examination by the State of California’s Franchise Tax Board. The Company’s fiscal year 2011 Italian income tax return is currently under examination.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
Earnings Per Share	Jun. 30, 2014
Earnings Per Share	'
	Note 9.Earnings Per Share
	The following table sets forth the computation of earnings per share for the periods indicated. Weighted-average shares issuable upon the exercise of stock options that were not included in the calculation were 507,000, 470,000 and 220,000 for the fiscal years ended June 30, 2014, 2013 and 2012, respectively, because they were anti-dilutive.

	Year Ended June 30,	2014		2013			2012
	($000 except per share)
	Earnings from continuing operations attributable to	$	38,316	$	57,602		$	69,749
	II-VI Incorporated	$	38,316	$	57,602		$	69,749
	Earnings (loss) from discontinued operation	$	133		(6,789	)		(9,443	)
	Net Earnings from continuing operations attributable to	$	38,449	$	50,813		$	60,306
	II-VI Incorporated	$	38,449	$	50,813		$	60,306
	Divided by:
	Weighted average shares		62,248		62,411			62,823

	Basic earnings (loss) attributable to II-VI Incorporated
	per common share:
	Continuing operations	$	0.62	$	0.92		$	1.1
	Discontinued operation	$	-	$	(0.11	)	$	(0.15	)
	Consolidated	$	0.62	$	0.81		$	0.96

	Earnings from continuing operations attributable to	$	38,316	$	57,602		$	69,749
	II-VI Incorporated	$	38,316	$	57,602		$	69,749
	Earnings (loss) from discontinued operation	$	133		(6,789	)		(9,443	)
	Net Earnings from continuing operations attributable to	$	38,449	$	50,813		$	60,306
	II-VI Incorporated	$	38,449	$	50,813		$	60,306
	Divided by:
	Weighted average shares		62,248		62,411			62,823
	Diluted effect of common stock equivalents		1,438		1,473			1,562
	Diluted weighted average common shares		63,686		63,884			64,385

	Diluted earnings (loss) attributable to II-VI Incorporated
	per common share:
	Continuing operations	$	0.6	$	0.9		$	1.08
	Discontinued operation	$	-	$	(0.11	)	$	(0.15	)
	Consolidated	$	0.6	$	0.8		$	0.94

Operating_Leases

Operating Leases	12 Months Ended
Operating Leases	Jun. 30, 2014
Operating Leases	'
	Note 10.	Operating Leases
	The Company leases certain property under operating leases that expire at various dates through the year ending July 2061. Future rental commitments applicable to the operating leases at June 30, 2014 are as follows:

	Year Ending June 30,
	$0
	2015		$	13,298
	2016			10,056
	2017			7,191
	2018			5,158
	2019			1,990
	Thereafter			18,795



	Rent expense was approximately $13.6 million, $9.8 million, and $7.6 million for the fiscal years ended June 30, 2014, 2013 and 2012, respectively.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
Share-Based Compensation	Jun. 30, 2014
Shared-Based Compensation Plans	'
	Note 11.	Share-Based Compensation Plans
	The Company’s Board of Directors adopted the II-VI Incorporated 2012 Omnibus Incentive Plan (the “Plan”) which was approved by the shareholders at the Annual Meeting in November 2012. The Plan provides for the grant of non-qualified stock options, stock appreciation rights, restricted shares, restricted share units, deferred shares, performance shares and performance share units to employees, officers and directors of the Company. The maximum number of shares of the Company’s Common Stock authorized for issuance under the Plan shall not in the aggregate exceed 1,900,000 shares of Common Stock, not including any remaining shares forfeited under the predecessor plan that may be rolled into the Plan. The Plan has vesting provisions predicated upon the death, retirement or disability of the grantee. As of June 30, 2014, there were approximately 1,242,317 shares available to be issued under the Plan, including forfeited shares from predecessor plans.
	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. The Company accounts for cash-based stock appreciation rights, cash-based restricted share unit awards and cash-based performance share unit awards as liability awards, in accordance with applicable accounting standards.
	Share-based compensation expense for the fiscal years ended June 30, 2014, 2013 and 2012 is as follows ($000):

		Year Ended				Year Ended				Year Ended
		30-Jun-14				30-Jun-13				30-Jun-12

	Stock Options and Cash-Based Stock Appreciation Rights		5,818			$	5,046			$	6,025

	Restricted Share Awards and Cash-Based Restricted Share		4,868				4,411				2,945
	Unit Awards		4,868				4,411				2,945

	Performance Share Awards and Cash-Based Performance Share		2,311				3,200				2,614
	Unit Awards		2,311				3,200				2,614

		$	12,997			$	12,657			$	11,584


	The share-based compensation expense is allocated approximately 20% to cost of goods sold and 80% to selling, general and administrative expense in the Consolidated Statements of Earnings, based on the employee classification of the grantees. Share-based compensation expense associated with liability awards was $0.7 million in fiscal years 2014 and 2013, respectively, and was not significant in fiscal year 2012.
	Stock Options and Cash-Based Stock Appreciation Rights:
	The Company utilized the Black-Scholes valuation model for estimating the fair value of stock option expense. During the fiscal years ended June 30, 2014, 2013 and 2012, the weighted-average fair value of options granted under the stock option plan was $8.21, $8.37 and $9.32, respectively, per option using the following assumptions:

	Year Ended June 30,		2014				2013				2012
	Risk-free interest rate			1.71	%			0.98	%			1.05	%
	Expected volatility			47	%			49	%			59	%
	Expected life of options		5.56 years				5.66 years				5.47 years
	Dividend yield		None				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 options. The risk-free interest rate shown above is the weighted average rate for all options granted during the fiscal year. Expected volatility is based on the historical volatility of the Company’s Common Stock over the period commensurate with the expected life of the options. The expected life calculation is based on the observed time to post-vesting exercise and/or forfeitures of options 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 option pre-vesting cancellations 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.

	Stock option and cash-based stock appreciation rights activity during the fiscal year ended June 30, 2014 was as follows:

		Stock Options								Cash-Based Stock Appreciation Rights
		Number of				Weighted Average				Number of				Weighted Average
		Shares				Exercise Price				Rights				Exercise Price
	Outstanding - July 1, 2013		4,670,011			$	15.59				60,820			$	18.78
	Granted		612,180			$	18.38				58,470			$	17.88
	Exercised		(438,449	)		$	10.22				(460	)		$	18.93
	Forfeited and Expired		(139,188	)		$	18.51				(10,112	)		$	18.94
	Outstanding - June 30, 2014		4,704,554			$	16.37				108,718			$	18.28
	Exercisable - June 30, 2014		3,025,156			$	15.48				10,574			$	18.79


	As of June 30, 2014, 2013 and 2012, the aggregate intrinsic value of stock options and cash-based stock appreciation rights outstanding and exercisable was $5.2 million, $9.7 million and $14.6 million, respectively. Aggregate intrinsic value represents the total pretax intrinsic value (the difference between the Company’s closing stock price on the last trading day of the year ended June 30, 2014, and the option’s exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on June 30, 2014. This amount varies based on the fair market value of the Company’s stock. The total intrinsic value of stock options and cash-based stock appreciation rights exercised during the fiscal years ended June 30, 2014, 2013, and 2012 was $3.1 million, $2.9 million, and $4.5 million, respectively. As of June 30, 2014, total unrecognized compensation cost related to non-vested stock options and cash-based stock appreciation rights was $9.4 million. This cost is expected to be recognized over a weighted-average period of approximately three years. Outstanding and exercisable stock options at June 30, 2014 were as follows:


			Stock Options and Cash-Based Stock												Stock Options and Cash-Based Stock
			Appreciation Rights Outstanding												Appreciation Rights Exercisable
							Weighted				Weighted						Weighted		Weighted
			Number of				Average Remaining				Average				Number of		Average Remaining		Average
	Range of		Shares or				Contractual Term				Exercise				Shares or		Contractual Term		Exercise
	Exercise Prices		Rights				(Years)				Price				Rights		(Years)		Price
	$8.44-$12.80			1,331,888				3.05			$	10.7				1,233,668		2.88		10.59
	$13.17-$20.26			2,831,846				7			$	17.45				1,196,748		5.44		16.47
	$20.47-$27.18			649,538				4.37			$	23.52				605,314		4.18		23.49
				4,813,272				5.52			$	16.42				3,035,730		4.14		15.49
	Restricted Share Awards and Cash-Based Restricted Share Unit Awards:
	Restricted share awards and cash-based restricted share unit awards compensation expense was calculated based on the number of shares or units expected to be earned by the grantee multiplied by the stock price at the date of grant, and is being recognized over the vesting period. Generally, the restricted share awards and restricted share unit awards have a three year cliff-vesting provision and an estimated forfeiture rate of 7.5%.

	Restricted share and cash-based restricted share unit activity during the fiscal year ended June 30, 2014, was as follows:

		Restricted Share Awards								Cash-Based Restricted Share Units
		Number of				Weighted Average				Number of				Weighted Average
		Shares				Grant Date Fair Value				Units				Grant Date Fair Value
Nonvested - June 30, 2013			798,624			$	18.18				30,270			$	18.78
Granted			223,760			$	17.26				39,880			$	17.05
Vested			(195,707	)		$	19.19				-			$	-
Forfeited			(42,642	)		$	18.29				(5,840	)		$	18.63
Nonvested - June 30, 2014			784,035			$	17.66				64,310			$	17.72


As of June 30, 2014, total unrecognized compensation cost related to non-vested restricted share and cash-based restricted share unit awards was $5.7 million. This cost is expected to be recognized over a weighted-average period of approximately two years. The restricted share compensation expense was calculated based on the number of shares expected to be earned multiplied by the stock price at the date of grant and is being recognized over the vesting period. The cash-based restricted share unit compensation expense was calculated based on the number of shares expected to be earned multiplied by the stock price at the period-end date and is being recognized over the vesting period. The total fair value of the restricted share and cash-based restricted share unit awards granted during the years ended June 30, 2014, 2013 and 2012, was $4.5 million, $7.0 million and $5.5 million, respectively. The total fair value of restricted shares vested was $3.8 million and $0.7 million during fiscal years 2014 and 2013, respectively, and was not significant during fiscal year 2012.
Performance Share Awards and Cash-Based Performance Share Unit Awards:
The Compensation Committee of the Board of Directors of the Company granted certain executive officers and employees performance share awards and performance share unit awards under the Plan. As of June 30, 2014, 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 the creation of 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 compensation expense was calculated based on the number of shares expected to be earned multiplied by the stock price at the date of grant, and is being recognized over the vesting period. The cash-based performance share unit compensation expense was calculated based on the number of shares expected to be earned multiplied by the stock price at the period-end date, and is being recognized over the vesting period. Performance share and cash-based performance share unit award activity relating to the plan during the year ended June 30, 2014, was as follows:

	Performance Share Awards								Cash-Based Performance Share Units
	Number of				Weighted Average				Number of				Weighted Average
	Shares				Grant Date Fair Value				Units				Grant Date Fair Value
Nonvested - June 30, 2013		359,754			$	17.85				107,096			$	18.93
Granted		105,900			$	19.37				2,150			$	19.37
Vested		(77,656	)		$	17.53				-			$	-
Forfeited		(55,818	)		$	17.56				(10,102	)		$	18.93
Nonvested - June 30, 2014		332,180			$	18.46				99,144			$	18.94

As of June 30, 2014, total unrecognized compensation cost related to non-vested performance share and cash-based performance share unit awards was $3.3 million. This cost is expected to be recognized over a weighted-average period of approximately two years. The total fair value of the performance share and cash-based performance share unit awards granted during the fiscal years ended June 30, 2014, 2013 and 2012 was $2.1 million, $5.9 million and $3.3 million, respectively. The total fair value of performance shares vested during the fiscal years ended June 30, 2014, 2013 and 2012 was $1.3 million, $2.6 million and $1.6 million, respectively.

Segment_and_Geographic_Reporti

Segment and Geographic Reporting	12 Months Ended
Segment and Geographic Reporting	Jun. 30, 2014
Segment and Geographic Reporting	'
	Note 12.	Segment and Geographic 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 acquisitions of Laser Enterprise on September 12, 2013 and Network Solutions on November 1, 2013, the Company has established a new reporting segment “Active Optical Products” which reports the operating results of the Company’s recently acquired businesses.
	The Company has five reportable segments as of June 30, 2014. 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 from continuing operations 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 June 30, 2014: (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, Inc. (“Photop Aeigs”) and Photop AOFR; (iii) Military & Materials, which consists of the Company’s LightWorks Optical Systems (formerly the Company’s EEO and LightWorks Optical Systems subsidiaries, “LWOS”), VLOC Incorporated (“VLOC”), Max Levy Autograph, Inc. (“MLA”) and 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 and Network Solutions.
	During December 2013, the Company completed the discontinuance of its tellurium product line by exiting all business activities associated with this product. This product line was previously serviced by PRM and was included as part of the Military & Materials segment. Segment information for all periods presented has been adjusted to properly reflect the tellurium product as a discontinued operation.
	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 the Corporate Chief Operating Officer 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 the Corporate Chief Operating Officer, 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 the Corporate Chief Operating Officer. 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., Italy, Japan, Thailand, Hong Kong and the U.K. The Active Optical Products segment is directed by the Corporate Chief Operating Officer. Laser Enterprise manufactures high-power semiconductor laser components enabling fiber and direct diode laser systems for material processing, medical, consumer and printing applications. In addition, Laser Enterprise manufactures pump lasers for optical amplifiers for both terrestrial and submarine applications and VCSELS for optical navigation, optical interconnects and optical sensing applications. Network Solutions manufactures optical amplifiers and micro-optics for both terrestrial and submarine applications within the optical communications market.
	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 from continuing operations 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:

				Near-		Military		Advanced		Active
		Infrared		Infrared		&		Products		Optical
		Optics		Optics		Materials		Group		Products			Eliminations			Total
	$0
	2014
	Revenues	$	209,658	$	144,677	$	98,324	$	115,394	$	115,208		$	-		$	683,261
	Inter-segment revenues		1,608		2,406		6,514		6,388		563			(17,479	)		-
	Segment earnings (loss)		40,736		9,814		12,851		9,419		(26,334	)		-			46,486
	Interest expense		-		-		-		-		-			-			(4,479	)
	Other income, net		-		-		-		-		-			-			3,634
	Income taxes		-		-		-		-		-			-			(7,325	)
	Earnings from discontinued operation		-		-		-		-		-			-			133
	Net earnings		-		-		-		-		-			-			38,449
	Depreciation and amortization		9,174		16,764		8,111		9,947		9,102			-			53,098
	Segment assets		231,874		295,953		117,730		175,986		250,383			-			1,071,926
	Expenditures for property, plant and equipment		9,719		8,171		5,539		3,525		2,266			-			29,220
	Equity investment		-		-		-		11,589		-			-			11,589
	Goodwill		9,754		60,408		30,712		22,178		73,093			-			196,145

				Near-		Military		Advanced
		Infrared		Infrared		&		Products
		Optics		Optics		Materials		Group		Eliminations			Total
	$0
	2013
	Revenues	$	203,319	$	154,852	$	97,116	$	95,788	$	-		$	551,075
	Inter-segment revenues		2,618		896		4,853		5,311		(13,678	)		-
	Segment earnings		49,457		19,628		656		1,750					71,491
	Interest expense		-		-		-		-		-			(1,160	)
	Other income, net		-		-		-		-		-			7,155
	Income taxes		-		-		-		-		-			(18,766	)
	Loss from discontinued operation		-		-		-		-		-			(6,789	)
	Net earnings		-		-		-		-		-			51,931
	Depreciation and amortization		8,423		17,286		7,023		8,060		-			40,792
	Segment assets		238,700		307,431		139,923		177,748		-			863,802
	Expenditures for property, plant and equipment		5,812		9,170		3,909		6,314		-			25,205
	Equity investment		-		-		-		11,203		-			11,203
	Goodwill		9,677		60,269		30,712		22,694		-			123,352



				Near-		Military		Advanced
		Infrared		Infrared		&		Products
		Optics		Optics		Materials		Group		Eliminations			Total
	$0
	2012
	Revenues	$	201,611	$	140,001	$	100,235	$	74,556	$	-		$	516,403
	Inter-segment revenues		3,174		2,135		7,589		4,295		(17,193	)		-
	Segment earnings		51,095		14,060		7,925		8,442					81,522
	Interest expense		-		-		-		-		-			(212	)
	Other income, net		-		-		-		-		-			7,168
Income taxes		-		-		-		-		-			(17,760	)
Loss from discontinued operation		-		-		-		-		-			(9,443	)
Net earnings		-		-		-		-		-			61,275
Depreciation and amortization		8,480		15,803		5,957		4,283		-			34,523
Expenditures for property, plant and equipment		8,072		12,249		11,983		10,493		-			42,797

Geographic information for revenues from the country of origin, and long-lived assets from the country of origin, which include property, plant and equipment, net of related depreciation, and certain other long-term assets, is as follows:

		Revenues
Year-Ended June 30,		2014		2013		2012
$0
United States		$	263,493	$	251,735	$	204,706
Non-United States
China			114,247		123,306		123,348
Switzerland			70,260		10,268		11,714
Germany			69,983		59,628		51,962
Hong Kong			54,602		-		-
Japan			38,110		29,462		35,915
Vietnam			23,141		29,425		31,500
Philippines			14,959		17,400		26,185
Italy			8,897		7,593		7,214
Singapore			8,273		6,280		7,238
United Kingdom			7,148		6,865		6,026
Belgium			6,578		5,821		6,010
Australia			3,570		3,292		4,585
Total Non-United States			419,768		299,340		311,697
		$	683,261	$	551,075	$	516,403





		Long-Lived Assets
June 30,		2014		2013		2012
$0
United States		$	109,138	$	110,337	$	85,709
Non-United States
China			45,667		43,139		45,412
Switzerland			22,524		5		10
Germany			16,129		2,107		1,581
Vietnam			9,107		10,081		10,278
Philippines			6,205		7,207		8,692
Hong Kong			5,111		-		-
Other			2,218		3,244		4,143
Total Non-United States			106,961		65,783		70,116
		$	216,099	$	176,120	$	155,825

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments

12 Months Ended

Jun. 30, 2014

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 June 30, 2014, 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. During fiscal year 2014, the Company settled a contingent earnout arrangement related to the acquisition of LightWorks in the amount of $3.0 million. The LightWorks earnout arrangement provided 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. The fair value of the earnout arrangement was based on significant inputs not observable in the market and represented a Level 3 measurement. Included in Other expense (income), net for the year ended June 30, 2014 is a $0.3 million unrealized gain due to a fair value remeasurement that reduced the earnout liability. The following table provides a summary by level of the fair value of financial instruments that are measured on a recurring basis as of June 30, 2014 ($000):

Fair Value Measurements at June 30, 2014 Using:

Quoted

Prices in

Active

Significant

Markets

for

Other

Significant

Identical

Observable

Unobservable

June 30,2014

Assets

Inputs

(Level 1)

(Level 2)

(Level 3)

Liabilities:

Contingent Earnout Arrangement

Foreign currency forward contracts

Fair Value Measurements at June 30, 2013 Using:

Quoted

Prices in

Active

Significant

Markets

for

Other

Significant

Identical

Observable

Unobservable

June 30,2013

Assets

Inputs

(Level 1)

(Level 2)

(Level 3)

Liabilities:

Contingent Earnout Arrangement

3,300

Foreign currency forward contracts

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 fiscal years 2014 and 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:

Significant Other

Unobservable Inputs

(Level 3)

Balance at June 30, 2013

3,300

Payment of earnout arrangement

(3,000

)

Changes in fair value

(300

)

Balance at June 30, 2014

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 are variable interest rates and accordingly their carrying amounts approximate fair value.

Derivative_Instruments

Derivative Instruments	12 Months Ended
	Jun. 30, 2014
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 financial statements. These contracts had a total notional amount of $7.4 million and $4.7 million at June 30, 2014 and June 30, 2013, respectively. As of June 30, 2014, these forward contracts had expiration dates ranging from August 2014 through October 2014, with Japanese Yen denominations individually at 250 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 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 Consolidated Balance Sheets. The change in the fair value of these contracts for the fiscal years ended June 30, 2014, 2013 and 2012 was insignificant.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Jun. 30, 2014
Employee Benefit Plans	'
	Note 15.	Employee Benefit Plans
	Eligible U.S. employees of the Company participate in a profit sharing retirement plan. Contributions accrued for the plan are made at the discretion of the Company’s board of directors and were $2.5 million, $2.2 million, and $2.8 million for the years ended June 30, 2014, 2013 and 2012, respectively.
	The Company has an employee stock purchase plan available for employees who have completed six months of continuous employment with the Company. The employee may purchase the Company’s Common Stock at 5% below the prevailing market price. The amount of shares which may be bought by an employee during each fiscal year is limited to 10% of the employee’s base pay. This plan, as amended, limits the number of shares of Common Stock available for purchase to 1,600,000 shares. There were 543,234 and 560,034 shares of Common Stock available for purchase under the plan at June 30, 2014 and 2013, respectively.
	Switzerland Defined Benefit Plan
	In conjunction with the acquisition of the Oclaro’s Switzerland-Based Semiconductor Laser Business we assumed a pension plan covering employees of our Swiss subsidiary (Swiss Plan). Employer and employee contributions are made to the Swiss plan based on various percentages of salary and wages that vary according to employee age and other factors. Employer contributions to the Swiss Plan for year ended June 30, 2014 were $2.3 million. Expected employer contributions in fiscal year 2015 are $2.1 million.



	The funded status of the Swiss Plan in the fiscal year ended June 30, 2014 was as follows:

		Year Ended
		30-Jun-14
	Change in projected benefit obligation:
	Projected benefit obligation, date of acquisition	$	38,748
	Service cost		3,375
	Interest cost		812
	Plan amendments		(1,661	)
	Participant contributions		1,110
	Benefits (paid) received		(3,959	)
	Actuarial (gain) loss on obligation		(867	)
	Currency translation adjustment		1,832
	Projected benefit obligation, end of period	$	39,390
	Change in plan assets:
	Plan assets at fair value, date of acquisition		30,167
	Actual return on plan assets		776
	Employer contributions		2,253
	Participant contributions		1,110
	Benefits (paid) received		(3,959	)
	Currency translation adjustment		1,617
	Plan assets at fair value, end of period	$	31,965
	Amounts recognized in consolidated balance sheets:
	Other non-current assets:
	Deferred tax asset	$	1,570
	Other non-current liabilities:
	Underfunded pension liability	$	7,425
	Amounts recognized in accumulated other comprehensive
	income, net of tax:
	Pension adjustment	$	1,443
	Accumulated benefit obligation, end of period	$	35,581


	Net periodic pension cost associated with the Swiss Plan in the fiscal year ended June 30, 2014 included the following components:

		Year Ended
		30-Jun-14
	Service cost	$	3,375
	Interest cost		812
	Expected return on plan assets		(1,338	)
	Net amortization		-
	Net period pension cost	$	2,849


	The Company expects to recognize approximately $0.3 million as a component of net periodic benefit cost in fiscal 2015 as a result of amortization from accumulated other comprehensive income.



	The projected and accumulated benefit obligations for the Swiss Plan were calculated as of June 30, 2014 using the following assumptions:

		Year Ended
		30-Jun-14
	Discount rate		2	%
	Salary increase rate		2	%
	Expected return on plan assets		3.5	%
Expected average remaining working life (in years)		13.1
The discount rate is based on assumed pension benefit maturity and estimates developed using the rate of return and yield curves for high quality Swiss corporate and government bonds. The salary increase rate is based on our best assessment for on-going increases over time. The expected long-term rate of return on plan assets is based on the expected asset allocation and taking into consideration historical long-term rates of return for the relevant asset categories.
The Swiss Plan is legally separate from II-VI, as are the assets of the plan. As of June 30, 2014, the Swiss Plan’s asset allocation was as follows:

	Year Ended
	30-Jun-14
Fixed income investments		22	%
Equity investments		54	%
Real estate		14	%
Cash		8	%
Alternative investments		2	%
		100	%
The Swiss Plan assets are measured at fair value and are classified into two distinct levels of the fair value hierarchy. The Swiss Plan assets are comprised of Level 1 assets, which include cash, equity investments and fixed income investments, and Level 3 assets, which include real estate and alternative investments. The investment strategy of the Swiss Plan is to achieve a consistent long-term return which will provide sufficient funding for future pension obligations while limiting risk. The investment strategy is reviewed regularly.
Estimated future benefit payments under the Swiss Plan are estimated to be $1.3 million in fiscal year 2015, $1.1 million in fiscal year 2016, $1.6 million in fiscal year 2017, $0.7 million in fiscal year 2018, $3.1 million in fiscal year 2019 and $10.7 million thereafter. These benefits will be paid out of the assets of the Swiss Plan and not by the Company.
PRM Defined Benefit Plan
As a requirement of a collective bargaining agreement, PRM maintains a defined benefit plan for substantially all of its employees. The plan provides for retirement benefits based on a certain percentage of the latest monthly salary of an employee per year of service. The pension liability was $0.6 million and $1.1 million at June 30, 2014 and June 30, 2013, respectively. The PRM Plan is an unfunded pension plan under which the Company makes payments directly to employees. As these payments are made directly by the Company, there are no separate assets utilized to fund this plan.
The Company has no program for post-retirement health and welfare benefits.
The II-VI Incorporated Deferred Compensation Plan (the “Compensation Plan”) is designed to allow officers and key employees of the Company to defer receipt of compensation into a trust fund for retirement purposes. Under the Compensation Plan, eligible participants can elect to defer up to 100% of discretionary incentive compensation, performance share awards and restricted share awards into the Compensation Plan. The Compensation Plan is a nonqualified, defined contribution employees’ retirement plan. At the Company’s discretion, the Compensation Plan may be funded by the Company making contributions based on compensation deferrals, matching contributions and discretionary contributions. Compensation deferrals will be based on an election by the participant to defer a percentage of compensation under the Compensation Plan. All assets in the Compensation Plan are subject to claims of the Company’s creditors until such amounts are paid to the Compensation Plan participants. Employees of the Company made contributions to the Compensation Plan in the amounts of approximately $1.9 million, $1.8 million, and $1.4 million for the fiscal years ended June 30, 2014, 2013, and 2012, respectively. There were no employer contributions made to the Compensation Plan for the fiscal years ended June 30, 2014, 2013 and 2012.

Other_Accrued_Liabilities

Other Accrued Liabilities	12 Months Ended
Other Accrued Liabilities	Jun. 30, 2014
Other Accrued Liabilities	'
	Note 16.	Other Accrued Liabilities
	The components of other accrued liabilities were as follows:

	June 30,		2014			2013
	$0
	Acquisition holdbacks		$	10,000		$	-
	Redeemable noncontrolling interest liability			-			8,568
	Earnout arrangement			-			3,300
	Warranty reserve			2,859			1,661
	Other accrued liabilities			18,662			21,166
			$	31,521		$	34,695

	In June 2013, the Company received notice from the noncontrolling interest holder of HIGHYAG of the intention to exercise the put option. The value of the put option was calculated using a formulaic model based upon earnings before interest, income taxes, depreciation and amortization (EBITDA), revenue growth and other variables. The price for the 25.07% noncontrolling interest the Company did not already own was $7.6 million; in addition a dividend of $1.0 million also was declared and was paid to the noncontrolling interest holder in fiscal year 2014. Both of these amounts are included in the Consolidated Balance Sheet as of June 30, 2013 as a current liability within Other accrued liabilities as these amounts were paid in August 2013.

	Changes in the carrying amount of our redeemable noncontrolling interest were as follows:

	Year Ended June 30,		2014			2013			2012
	$0
	Balance at Beginning of Year		$	-		$	5,160		$	1,828
	Net earnings attributable to redeemable noncontrolling interest			-			1,118			969
	Other changes			-			(585	)		(267	)
	Redemption value adjustment to redeemable noncontrolling interest			-			2,875			2,630
	Reclassification of redeemable noncontrolling interest to Other accrued liabilities			-			(8,568	)		-
	Balance at End of Year		$	-		$	-		$	5,160


	The following table summarizes the change in the carrying value of the company’s warranty reserve included in Other Accrued Liabilities as of and for the year ended June 30, 2014.

	Year Ended June 30,		2014
	$0
	Balance-Beginning of Year		$	1,661
	Settlements during the period			(1,843	)
	Additional warranty liability recorded			1,868
	Warranty liability assumed through acquisitions			1,173
	Balance-End of Year		$	2,859

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Jun. 30, 2014
Commitments and Contingencies	'
	Note 17.	Commitments and Contingencies
	The Company has purchase commitments for materials and supplies as part of the ordinary conduct of business. A portion of the commitments are long-term and are based on minimum purchase requirements. Certain short-term raw material purchase commitments have a variable price component which is based on market pricing at the time of purchase. Due to the proprietary nature of some of the Company’s materials and processes, certain contracts may contain penalty provisions for early termination. The Company does not believe that a significant amount of penalties is reasonably likely to be incurred under these commitments based upon historical experience and current expectation. Total future commitments are as follows:

	Year Ending June 30,
	$0
	2015		$	15,906
	2016			489
	2017			488
	2018			-
	2019		$	-

Capital_Lease

Capital Lease	12 Months Ended
Capital Lease	Jun. 30, 2014
Capital Lease	'
	Note 18.	Capital Lease
	In December 2013, the Company's HIGHYAG subsidiary entered into a capital lease related to a building in Germany. The following table shows the future minimum lease payments due under the non-cancelable capital lease ($000):

	Fiscal Year Ending:		Amount
	2015		$	1,071
	2016			1,071
	2017			1,071
	2018			1,071
	2019			1,071
	Thereafter			12,228

	Total minimum lease payments			17,583
	Less amount representing interest			5,947

	Present value of capitalized payments			11,636
	Less: current portion			453

	Long-term portion		$	11,183

	The current and long-term portion of the capital lease obligation was recorded in Other accrued liabilities and Other liabilities, respectively, in the Company’s Condensed Consolidated Balance Sheets as of June 30, 2014. The present value of the capitalized payments of $11.6 million was recorded in Property, plant & equipment, net, in the Company’s Condensed Consolidated Balance Sheets as of June 30, 2014, with associated depreciation expense being recorded over the 17 year life of the lease.

	In August 2014, the Company exited its capital lease obligation by purchasing the existing manufacturing facility in Berlin, Germany utilized by the Company’s HIGHYAG business. The total cash paid for this purchase was approximately $13.4 million and was financed through existing cash balances at June 30, 2014.

Share_Repurchase_Program

Share Repurchase Program	12 Months Ended
	Jun. 30, 2014
Share Repurchase Program	'
	Note 19.	Share Repurchase Programs
	In February 2014 and May 2012, the Board of Directors authorized the Company to purchase up to $20 million and $25 million, respectively, of its Common Stock. The repurchase programs called for shares to be purchased in the open market or in private transactions from time to time. Shares purchased by the Company are retained as treasury stock and available for general corporate purposes. During the fiscal years ended June 30, 2014, 2013 and 2012, the Company purchased 1,333,355 shares, 1,141,022 shares, 301,716 shares of its Common Stock for $20.0 million, $20.0 million, and $5.0 million, respectively, under the repurchase programs.

	In August 2014, the Board of Directors authorized the Company to purchase up to $50.0 million of its Common Stock. The repurchase program has no expiration and calls for shares to be purchased in the open market or in private transactions from time to time. Shares purchased by the Company will be retained as treasury stock and available for general corporate purposes. During August 2014, the Company purchased 180,000 shares of its Common Stock for $2.5 million under this new repurchase program.

Quarterly_Financial_Data

Quarterly Financial Data	12 Months Ended
Quarterly Financial Data	Jun. 30, 2014
Quarterly Financial Data	'
	Quarterly Financial Data (unaudited)
	Fiscal 2014

		September 30,			December 31,			March 31,			June 30,
	Quarter Ended	2013			2013			2014			2014
	$0
	2014
	Net revenues	$	150,020		$	171,765		$	173,555		$	187,921
	Cost of goods sold		93,709			118,371			118,865			125,600
	Internal research and development		7,747			11,355			12,099			11,322
	Selling, general and administrative		35,093			32,471			33,848			36,295
	Interest expense		483			1,169			1,412			1,415
	Other expense (income) - net		53			(1,125	)		(1,694	)		(868	)
	Earnings from continuing operations before income taxes		12,935			9,524			9,025			14,157
	Income taxes		3,243			2,086			494			1,502
	Earnings from continuing operations		9,692		$	7,438		$	8,531		$	12,655
	Earnings (loss) from discontinued operations, net of income taxes		2		$	131		$	-		$	-
	Net Earnings Attributable to II-VI Incorporated	$	9,694		$	7,569		$	8,531		$	12,655
	Net Earnings Attributable to II-VI Incorporated: Basic earnings
	per share:
	Continuing operations	$	0.16		$	0.12		$	0.14		$	0.21
	Discontinued operation	$	0		$	-		$	-		$	-
	Consolidated	$	0.16		$	0.12		$	0.14		$	0.21
	Net Earnings Attributable to II-VI Incorporated: Diluted earnings
	per share:
	Continuing operations	$	0.15		$	0.12		$	0.13		$	0.20
	Discontinued operation	$	0		$	-		$	-		$	-
	Consolidated	$	0.15		$	0.12		$	0.13		$	0.2
	Fiscal 2013

		September 30,			December 31,			March 31,			June 30,
	Quarter Ended	2012			2012			2013			2013
	$0
	2013
	Net revenues	$	127,998		$	125,107		$	143,940		$	154,030
	Cost of goods sold		77,599			77,839			92,986			99,134
	Internal research and development		5,585			5,626			5,781			5,697
	Selling, general and administrative		26,356			26,174			27,004			29,803
	Interest expense		36			223			449			452
	Other expense (income) - net		(761	)		(4,551	)		(1,401	)		(442	)
	Earnings from continuing operations before income taxes		19,183			19,796			19,121			19,386
	Income taxes		4,262			6,721			2,861			4,922
	Earnings from continuing operations		14,921		$	13,075		$	16,260		$	14,464
	Earnings (loss) from discontinued operations, net of income taxes		(1,789	)	$	(608	)	$	(166	)	$	(4,226	)
	Net Earnings		13,132		$	12,467		$	16,094		$	10,238
	Net Earnings Attributable to Noncontrolling Interest		414		$	267		$	225		$	212
	Net Earnings Attributable to II-VI Incorporated	$	12,718		$	12,200		$	15,869		$	10,026
	Net Earnings Attributable to II-VI Incorporated: Basic earnings
	per share:
	Continuing operations	$	0.23		$	0.2		$	0.26		$	0.23
	Discontinued operation	$	(0.03	)	$	(0.01	)	$	(0.00	)	$	(0.07	)
	Consolidated	$	0.2		$	0.19		$	0.26		$	0.16
	Net Earnings Attributable to II-VI Incorporated: Diluted earnings
	per share:
	Continuing operations	$	0.23		$	0.2		$	0.25		$	0.22
	Discontinued operation	$	(0.03	)	$	(0.01	)	$	(0.00	)	$	(0.07	)
	Consolidated	$	0.2		$	0.19		$	0.25		$	0.16

Valuation_and_Qualifying_Accou

Valuation and Qualifying Accounts	12 Months Ended
Valuation and Qualifying Accounts	Jun. 30, 2014
Valuation and Qualifying Accounts	'
	SCHEDULE II
	II-VI INCORPORATED AND SUBSIDIARIES
	VALUATION AND QUALIFYING ACCOUNTS
	YEARS ENDED JUNE 30, 2014, 2013, AND 2012
	(IN THOUSANDS OF DOLLARS)

				Additions
		Balance at		Charged			Charged					Deduction					Balance
		Beginning		to			to Other					from					at End
		of Year		Expense			Accounts					Reserves					of Year
	YEAR ENDED JUNE 30, 2014:
	Allowance for doubtful accounts	$	1,479	$	993		$	-				$	(620	)	(3	)	$	1,852
	Warranty reserves	$	1,661	$	1,868		$	1,173		(1	)	$	(1,843	)			$	2,859

	YEAR ENDED JUNE 30, 2013:
	Allowance for doubtful accounts	$	1,536	$	(92	)	$	179		(2	)	$	(144	)	(3	)	$	1,479
	Warranty reserves	$	1,247	$	1,851		$	-				$	(1,437	)			$	1,661

	YEAR ENDED JUNE 30, 2012:
	Allowance for doubtful accounts	$	766	$	940		$	(18	)			$	(152	)	(3	)	$	1,536
	Warranty reserves	$	1,187	$	1,710		$	-				$	(1,650	)			$	1,247

	-1	Relates to the warranty reserve acquired from the acquisitions.
	-2	Primarily relates to allowance for doubtful accounts from the acquisitions.
	-3	Primarily relates to write-offs of accounts receivable.

Nature_of_Business_and_Summary1

Nature of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2014
Principles of Consolidation	'
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of the Company. All intercompany transactions and balances have been eliminated.
Foreign Currency Translation	'
	Foreign Currency Translation. For II-VI Singapore Pte., Ltd. and its subsidiaries, II-VI Suisse S.a.r.l., Pacific Rare Specialty Metals & Chemicals, Inc. (“PRM”), Photop AOFR Pty. Ltd. (“AOFR”), II-VI Laser Enterprise and II-VI Network Solutions Division the functional currency is the United States (U.S.) dollar. The determination of the functional currency is made based on the appropriate economic and management indicators.
	For all other foreign subsidiaries, the functional currency is the local currency. Assets and liabilities of those operations are translated into U.S. dollars using period-end exchange rates while income and expenses are translated using the average exchange rates for the reporting period. Translation adjustments are recorded as accumulated other comprehensive income within shareholders’ equity in the accompanying Consolidated Balance Sheets.
Cash and Cash Equivalents	'
Cash and Cash Equivalents	Cash and Cash Equivalents. The Company considers highly liquid investment instruments with an original maturity of three months or less to be cash equivalents. We place our cash and cash equivalents with high credit quality financial institutions and to date have not experienced credit losses in these instruments. Cash of foreign subsidiaries is on deposit at banks in China, Vietnam, Singapore, Japan, Switzerland, the Netherlands, Germany, the Philippines, Belgium, Italy, Hong Kong, Australia and the United Kingdom (“U.K.”).
Accounts Receivable	'
	Accounts Receivable. The Company establishes an allowance for doubtful accounts based on historical experience and believes the collection of revenues, net of this allowance, is reasonably assured.
	The Company factored a portion of the accounts receivable of its Japan subsidiary during each of the years ended June 30, 2014 and 2013. Factoring is done with large banks in Japan. During the years ended June 30, 2014 and 2013, $12.7 million and $8.5 million, respectively, of accounts receivable had been factored. As of June 30, 2014 and 2013, the amount included in other accrued liabilities representing the Company’s obligation to the bank for these receivables factored with recourse was immaterial.
Inventories	'
Inventories	Inventories. Inventories are valued at the lower of cost or market (“LCM”), with cost determined on the first-in, first-out basis. Inventory costs include material, labor and manufacturing overhead. Market cannot exceed the net realizable value (i.e., estimated selling price in the ordinary course of business less reasonably predicted costs of completion and disposal) and market shall not be less than net realizable value reduced by an allowance for an approximately normal profit margin. In evaluating LCM, management also considers, if applicable, other factors as well, including known trends, market conditions, currency exchange rates and other such issues. The Company records an inventory reserve as a charge against earnings for all products on hand more than twelve to eighteen months depending on the products that have not been sold to customers or cannot be further manufactured for sale to alternative customers. An additional reserve is recorded for product on hand that is in excess of product sold to customers over the same periods noted above. Inventories are presented net of reserves. The reserves totaled $12.0 million and $7.1 million at June 30, 2014 and 2013, respectively.
Property, Plant and Equipment	'
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment are carried at cost or fair market value upon acquisition. Major improvements are capitalized, while maintenance and repairs are generally expensed as incurred. The Company reviews its property, plant and equipment and other long-lived assets for impairment whenever events or circumstances indicate that the carrying amounts may not be recoverable. Depreciation for financial reporting purposes is computed primarily by the straight-line method over the estimated useful lives for building, building improvements and land improvements of 10 to 20 years and 3 to 12 years for machinery and equipment.
Business Combinations	'
Business Combinations	Business Combinations. The Company accounts for business acquisitions by establishing the acquisition-date fair value as the measurement for all assets acquired and liabilities assumed. Certain provisions of accounting principles generally accepted in the United States (“U.S. GAAP”) prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.
Goodwill	'
	Goodwill. The excess purchase price over the fair market value allocated to identifiable tangible and intangible net assets of businesses acquired is reported as goodwill in the accompanying Consolidated Balance Sheets. The Company tests goodwill for impairment at least annually as of April 1, or when events or changes in circumstances indicate that goodwill might be impaired. The evaluation of impairment involves comparing the current fair value of the Company’s reporting units to the recorded value (including goodwill). The Company uses a discounted cash flow (“DCF”) model and a market analysis to determine the current fair value of the 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.

	The Company has the option to perform a qualitative assessment of goodwill prior to completing the two-step process described above to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. If the Company concludes that this is the case, it must perform the two-step process. Otherwise, the Company will forego the two-step process and does not need to perform any further testing.
Intangibles	'
Intangibles	Intangibles. Intangible assets are initially recorded at their cost or fair market value upon acquisition. Finite-lived intangible assets are amortized for financial reporting purposes using the straight-line method over the estimated useful lives of the assets ranging from 7 to 18 years. Indefinite-lived intangible assets are not amortized but tested annually for impairment at April 1, or when events or changes in circumstances indicate that indefinite-lived intangible assets might be impaired.
Equity Method Investments	'
Equity Method Investments	Equity Method Investments. 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 June 30, 2014 and June 30, 2013 was $11.6 million and $11.2 million, respectively. During the years ended June 30, 2014, 2013 and 2012, the Company’s pro-rata share of earnings from this investment was $0.7 million, $1.0 million and $1.3 million, respectively, and was recorded in other expense (income), net in the Consolidated Statements of Earnings. During the years ended June 30, 2014 and 2013, the Company recorded dividends from this equity investment of $0.3 million and $0.5 million for the years ended June 30, 2014 and 2013, respectively.
Commitments and Contingencies	'
Commitments and Contingencies	Commitments and Contingencies. Liabilities for loss contingencies arising from claims, assessments, litigation, fines, and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred. Such accruals are adjusted as further information develops or circumstances change. The Company had no loss contingency liabilities at June 30, 2014 related to commitments and contingencies.
Accrued Bonus and Profit Sharing Contribution	'
Accrued Bonus and Profit Sharing Contribution	Accrued Bonus and Profit Sharing Contribution. The Company records bonus and profit sharing estimates as a charge against earnings. These estimates are adjusted to actual based on final results of operations achieved during the fiscal year. Certain partial bonus amounts are paid on an interim basis, and the remainder is paid after the fiscal year end after the final determination of the applicable percentage or amounts. Other bonuses are paid annually.
Warranty Reserve	'
Warranty Reserve	Warranty Reserve. The Company records a warranty reserve as a charge against earnings based on a percentage of revenues utilizing actual returns over a period that approximates historical warranty experience.
Income Taxes	'
Income Taxes	Income Taxes. Deferred income tax assets and liabilities are determined based on the differences between the consolidated financial statement and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount more likely than not to be realized. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The amount of unrecognized tax benefits is adjusted for changes in facts and circumstances. For example, adjustments could result from significant amendments to existing tax law and the issuance of regulations or interpretations by the taxing authorities, new information obtained during a tax examination, or resolution of an examination. The Company believes that its estimates for uncertain tax positions are appropriate and sufficient to pay assessments that may result from examinations of its tax returns. The Company recognizes both accrued interest and penalties related to unrecognized tax benefits in income tax expense.
Revenue Recognition	'
	Revenue Recognition. The Company recognizes revenues for product shipments when persuasive evidence of a sales arrangement exists, the product has been shipped or delivered, the sale price is fixed or determinable and collectability is reasonably assured. Title and risk of loss passes from the Company to its customer at the time of shipment in most cases with the exception of certain customers. For these customers, title does not pass and revenue is not recognized until the customer has received the product at its physical location.
	We establish an allowance for doubtful accounts and warranty reserves based on historical experience and believe the collection of revenues, net of these reserves, is reasonably assured. Our allowance for doubtful accounts and warranty reserve balances at June 30, 2014 were approximately $1.9 million and $2.9 million, respectively. Our reserve estimates have historically been proven to be materially correct based upon actual charges incurred.

	The Company’s revenue recognition policy is consistently applied across the Company’s segments, product lines and geographical locations. Further, we do not have post shipment obligations such as training or installation, customer acceptance provisions, credits and discounts, rebates and price protection, or other similar privileges. Our distributors and agents are not granted price protection. Our distributors and agents, which comprise less than 10% of consolidated revenues, have no additional product return rights beyond the right to return defective products covered by our warranty policy. Revenues generated from transactions other than product shipments are contract related and have historically accounted for less than 5% of consolidated revenues. We believe our revenue recognition practices have adequately considered the requirements under U.S. GAAP.
Shipping and Handling Costs	'
Shipping and Handling Costs	Shipping and Handling Costs. Shipping and handling costs billed to customers are included in revenues. Shipping and handling costs incurred by the Company are included in selling, general and administrative expenses in the accompanying Consolidated Statements of Earnings. Total shipping and handling revenue and costs included in revenues and in selling, general and administrative expenses were immaterial for the fiscal years ended June 30, 2014, 2013 and 2012.
Research and Development	'
Research and Development	Research and Development. Internal research and development costs and costs not related to customer and government funded research and development contracts are expensed as incurred.
Share-Based Compensation	'
Share-Based Compensation	Share-Based Compensation. The Company follows U.S. GAAP in accounting for share-based compensation arrangements, which requires the recognition of the fair value of stock 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.
Workers' Compensation	'
Workers' Compensation	Workers’ Compensation. The Company is self-insured for certain losses related to workers’ compensation for the majority of its U.S. employees. When estimating the self-insurance liability, the Company considers a number of factors, including historical claims experience, demographic and severity factors and valuations provided by independent third-party consultants. Periodically, management reviews its assumptions and valuations to determine the adequacy of the self-insurance liability.
Accumulated Other Comprehensive Income	'
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income. Accumulated other comprehensive income is a measure of all changes in shareholders’ equity that result from transactions and other economic events in the period other than transactions with owners. Accumulated other comprehensive income is a component of shareholders’ equity and consists of accumulated foreign currency translation adjustments of $18.0 million and $15.6 million, respectively, as of June 30, 2014 and 2013 and a pension adjustment of $1.4 million as of June 30, 2014.
Fair Value Measurements	'
Fair Value Measurements	Fair Value Measurements. The Company applies fair value accounting for all financial assets and liabilities that are required to be recognized or disclosed at fair value in the financial statements. Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market in which the Company would transact, and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk.
Estimates	'
Estimates	Estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Leases	'
Leases	Leases. The Company classifies leases as operating in accordance with the provisions of lease accounting. Rent expense under noncancelable operating leases with scheduled rent increases or rent holidays is accounted for on a straight-line basis over the lease term, beginning on the date of initial possession or the effective date of the lease agreement. The amount of the excess of straight-line rent expense over scheduled payments is recorded as a deferred liability. The current portion of unamortized deferred lease costs is included in other accrued liabilities and the long-term portion is included in other liabilities in the Consolidated Balance Sheets.
Recently Issued Financial Accounting Standards	'
	Recently Issued Financial Accounting Standards

	In May 2014, the Financial Accounting Standards Board (the “FASB”) issued an Accounting Standards Update (“ASU”) which supersedes virtually all existing revenue recognition guidance under U.S. GAAP. The update's core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2016 and prohibits early adoption. The update allows for the use of either the retrospective or modified retrospective approach of adoption. Management is currently evaluating the available transition methods and the potential impact of adoption on the Company's Consolidated Financial Statements.
	In April 2014, the FASB issued an ASU that changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results. The new standard will be effective for annual periods beginning on or after December 15, 2014 with early adoption permitted and will be effective for the Company beginning in the first quarter of fiscal year 2016. The adoption of this standard is not expected to have a significant impact on the Company’s Consolidated Financial Statements.
	In July 2013, the FASB issued an ASU that changes how certain unrecognized tax benefits are to be presented on the consolidated balance sheet. This ASU clarified existing guidance to require that an unrecognized tax benefit or a portion thereof be presented in the consolidated balance sheet as a reduction to a deferred tax asset for a net operating loss (“NOL”) carryforward, similar tax loss, or a tax credit carryforward except when an NOL carryforward, similar tax loss, or tax credit carryforward is not available under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position. In such a case, the unrecognized tax benefit would be presented in the consolidated balance sheet as a liability. 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 March 2013, the FASB issued an ASU 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 ASU 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_Tables

Acquisitions (Tables)	12 Months Ended
Acquisitions (Tables)	Jun. 30, 2014
Pro-forma Consolidated Results of Operations	'
		Year Ended June 30,
		2014		2013
	Net revenues	$	734,912	$	732,474
	Net earnings attributable to II-VI Incorporated	$	47,054	$	44,693
	Basic earnings per share	$	0.76	$	0.72
	Diluted earnings per share	$	0.75	$	0.7

Oclaro's Fiber Amplifier and Micro Optics Business	'
Summary of Purchase Price	'
	Net cash paid at acquisition	$	79,600
	Cash previously paid		5,000
	Holdback amount recorded in Other liabilities		4,000
	Purchase price	$	88,600

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed at Date of Acquisition	'
	The following table presents the allocation of the purchase price of the assets acquired at the date of acquisition ($000):
	Assets
	Inventories	$	11,314
	Property, plant & equipment		9,700
	Intangible assets		32,000
	Goodwill		35,586
	Total assets acquired	$	88,600

Oclaro Incorporated	'
Summary of Purchase Price	'
	Net cash paid at acquisition	$	90,601
	Cash paid for working capital adjustment		2,475
	Holdback amount recorded in Other liabilities		6,000
	Purchase price	$	99,076

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed at Date of Acquisition	'
	The following table presents the allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition ($000):
	Assets
	Inventories	$	26,071
	Prepaid and other assets		1,035
	Deferred income taxes		1,771
	Property, plant & equipment		30,184
	Intangible assets		28,900
	Goodwill		37,507
	Total assets acquired	$	125,468

	Liabilities
	Accounts payable	$	2,214
	Deferred income taxes		8,647
	Accrued income taxes		2,714
	Other accrued liabilities		12,817
	Total liabilities assumed	$	26,392
	Net assets acquired	$	99,076

Discontinued_Operation_Tables

Discontinued Operation (Tables)	12 Months Ended
Discontinued Operation (Tables)	Jun. 30, 2014
Summary of Revenues and Earnings (Losses) of Discontinued Operation	'
	The revenues and earnings (losses) of the tellurium product line have been reflected as a discontinued operation for the periods presented as follows ($000):

	June 30,	2014		2013			2012
	$0
	Revenues	$	1,849	$	7,321		$	18,227
	Earnings (loss) from discontinued operation before income taxes		133		(6,789	)		(9,583	)
	Income tax benefit		-		-			140
	Earnings (loss) from discontinued operation net income taxes	$	133	$	(6,789	)	$	(9,443	)

Inventories_Tables

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Jun. 30, 2014
Components of Inventories, Net of Reserves	'
	The components of inventories, net of reserves, were as follows:

	June 30,	2014		2013
	$0
	Raw materials	$	71,949	$	59,290
	Work in process		44,739		43,895
	Finished goods		49,185		38,674
		$	165,873	$	141,859

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
Property, Plant and Equipment (Tables)	Jun. 30, 2014
Property, Plant and Equipment	'
	Property, plant and equipment consists of the following:

	June 30,	2014			2013
	$0
	Land and improvements	$	2,381		$	2,236
	Buildings and improvements		96,551			87,189
	Machinery and equipment		335,408			276,802
	Construction in progress		16,990			10,831
			451,330			377,058
	Less accumulated depreciation		(242,391	)		(206,386	)
		$	208,939		$	170,672

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	Jun. 30, 2014
Changes in Carrying Amount of Goodwill	'
	Changes in the carrying amount of goodwill were as follows:
		Year Ended June 30, 2014
					Near-			Military		Advanced			Active
		Infrared			Infrared			&		Products			Optical
		Optics			Optics			Materials		Group			Products			Total

	Balance-July 1, 2013	$	9,677		$	60,269		$	30,712	$	22,694		$	-		$	123,352
	Goodwill acquired		-			-			-		-			73,093			73,093
	Goodwill adjustment		-			-			-		(516	)		-			(516	)
	Foreign currency translation		77			139			-		-			-			216
	Balance-June 30, 2014	$	9,754		$	60,408		$	30,712	$	22,178		$	73,093		$	196,145

	During the year ended June 30, 2014, the Company recorded an adjustment to goodwill of $0.5 million associated with the November 2012 acquisition of M Cubed Technologies, Inc. (“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 income tax return.

		Year Ended June 30, 2013
					Near-			Military		Advanced
		Infrared			Infrared			&		Products
		Optics			Optics			Materials		Group			Total

	Balance-July 1, 2012	$	9,612		$	48,496		$	12,326	$	10,314		$	80,748
	Goodwill acquired		-			10,980			18,386		12,381			41,746
	Foreign currency translation		65			793			-		-			858
	Balance-June 30, 2013	$	9,677		$	60,269		$	30,712	$	22,694		$	123,352

Gross Carrying Amount and Accumulated Amortization	'
	The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of June 30, 2014 and 2013 were as follows:

		Year Ended June 30, 2014								Year Ended June 30, 2013
		Gross						Net		Gross						Net
		Carrying			Accumulated			Book		Carrying			Accumulated			Book
		Amount			Amortization			Value		Amount			Amortization			Value

	Technology and patents	$	50,505		$	(14,474	)	$	36,031	$	39,659		$	(10,455	)	$	29,204
	Trademarks		17,870			(1,037	)		16,833		17,855			(963	)		16,892
	Customer lists		102,839			(19,448	)		83,391		52,614			(12,189	)		40,425
	Other		1,586			(1,437	)		149		1,580			(1,400	)		180
	Total	$	172,800		$	(36,396	)	$	136,404	$	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 years is as follows:

	Year Ending June 30,
	2015		$	11,716
	2016			11,619
	2017			11,609
	2018			11,140
	2019			10,715

Debt_Tables

Debt (Tables)	12 Months Ended
	Jun. 30, 2014
Components of Debt	'
	The components of debt were as follows ($000):
	June 30,	2014			2013
	Line of credit, interest at LIBOR, as defined, plus 1.75% and	$	154,000		$	111,000
	1.25%, respectively
	Term loan, interest at LIBOR, as defined, plus 1.25%	$	85,000			-
	Yen denominated line of credit, interest at LIBOR, as defined,		2,960			3,036
	plus 0.625%
	Total debt		241,960			114,036
	Current portion of long-term debt		(20,000	)		-
	Long-term debt, less current portion	$	221,960		$	114,036

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Jun. 30, 2014
Income (Loss) from Continuing Operations Before Income Taxes	'
	The components of income (loss) from continuing operations before income taxes were as follows:

	Year Ended June 30,	2014			2013			2012
	$0
	U.S. income (loss)	$	(2,863	)	$	19,253		$	16,025
	Non-U.S. income		48,504			58,233			72,453
	Total Earnings Before Tax	$	45,641		$	77,486		$	88,478

Components of Income Tax Expense (Benefit)	'

	The components of income tax expense (benefit) from continuing operations were as follows:

	Year Ended June 30,	2014			2013			2012
	$0
	Current:
	Federal		(1,067	)	$	2,759		$	283
	State	152				68			227
	Foreign		12,675			13,977			16,673
	Total Current	$	11,760		$	16,804		$	17,183
	Deferred:
	Federal		(16	)	$	1,721		$	3,409
	State	148				113			(356	)
	Foreign		(4,567	)		128			(2,476	)
	Total Deferred	$	(4,435	)	$	1,962		$	577
	Total Income Tax Expense	$	7,325		$	18,766		$	17,760

Schedule of Principal Items Comprising Deferred Income Taxes	'
	Principal items comprising deferred income taxes were as follows:

	June 30,	2014			2013
	$0
	Deferred income tax assets
	Inventory capitalization	$	5,402		$	6,333
	Non-deductible accruals		1,926			1,930
	Accrued employee benefits		9,226			6,790
	Net-operating loss and credit carryforwards		21,976			22,849
	Share-based compensation expense		16,005			15,021
	Other		577			205
	Valuation allowances		(2,212	)		(2,885	)
	Total deferred income tax assets	$	52,900		$	50,243
	Deferred income tax liabilities
	Tax over book accumulated depreciation		(17,625	)	$	(16,988	)
	Intangible assets		(25,505	)		(21,561	)
	Other		(2,786	)		(2,409	)
	Total deferred income tax liabilities	$	(45,916	)	$	(40,958	)
	Net deferred income taxes	$	6,984		$	9,285

Schedule of Reconciliation of Income Tax Expense at Statutory Federal Rate to Reported Income Tax Expense	'
	The reconciliation of income tax expense at the statutory federal rate to the reported income tax expense is as follows:

	Year Ended June 30,	2014			%			2013			%			2012			%
	$0
	Taxes at statutory rate	$	15,974			35		$	27,120			35		$	30,967			35
	Increase (decrease) in taxes resulting from:
	State income taxes-net of federal benefit		254			1			168			-			(187	)		-
	Taxes on non U.S. earnings		(6,672	)		(15	)		(6,991	)		(9	)		(9,841	)		(11	)
	Settlement of unrecognized tax benefits		-			-			-			-			(842	)		(1	)
	Research and manufacturing incentive deductions		(2,190	)		(5	)		(1,458	)		(2	)		(2,079	)		(3	)
	Other		(41	)		-			(73	)		-			(258	)		-
		$	7,325			16		$	18,766			24		$	17,760			20

Schedule of Sources of Differences Resulting in Deferred Income Tax Expense (Benefit)	'
	The sources of differences resulting in deferred income tax expense (benefit) from continuing operations and the related tax effect of each were as follows:

	Year Ended June 30,	2014			2013			2012
	$0
	Depreciation and amortization	$	(3,581	)	$	(2,825	)	$	38
	Inventory capitalization		646			84			(1,947	)
	Net operating loss and credit carryforwards net of valuation	533				4,786			1,859
	allowances	533				4,786			1,859
	Share-based compensation expense		(984	)		(3,487	)		(2,442	)
	Other		(1,049	)		3,404			3,069
		$	(4,435	)	$	1,962		$	577

Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards	'
	The Company has the following gross operating loss carryforwards and tax credit carryforwards as of June 30, 2014:

	Type	Amount			Expiration Date
	$0
	Tax credit carryforwards:
	Federal research and development credits	$	4,117		June 2019-June 2034
	State tax credits		2,827		June 2014-June 2029
	Operating loss carryforwards:
	Loss carryforwards - federal	$	36,124		June 2022-June 2029
	Loss carryforwards - state		25,116		June 2014-June 2034
	Loss carryforwards - foreign		9,427		June 2016-June 2022



Schedule of Changes in Liability for Unrecognized Tax Benefits	'
	Changes in the liability for unrecognized tax benefits for the fiscal years ended June 30, 2014, 2013 and 2012 were as follows:

		2014			2013			2012
	$0
	Balance at Beginning of Year	$	3,181		$	2,850		$	4,744
	Increases in current year tax positions		298			338			738
	Increases in prior year tax positions	2				-			-
	Decreases in prior year tax positions		-			(7	)		(41	)
	Settlements		-			-			(1,788	)
	Expiration of statute of limitations		(706	)		-			(803	)
	Balance at End of Year	$	2,775		$	3,181		$	2,850

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
Earnings Per Share (Tables)	Jun. 30, 2014
Computation of Earnings Per Share	'
	The following table sets forth the computation of earnings per share for the periods indicated. Weighted-average shares issuable upon the exercise of stock options that were not included in the calculation were 507,000, 470,000 and 220,000 for the fiscal years ended June 30, 2014, 2013 and 2012, respectively, because they were anti-dilutive.

	Year Ended June 30,	2014		2013			2012
	($000 except per share)
	Earnings from continuing operations attributable to	$	38,316	$	57,602		$	69,749
	II-VI Incorporated	$	38,316	$	57,602		$	69,749
	Earnings (loss) from discontinued operation	$	133		(6,789	)		(9,443	)
	Net Earnings from continuing operations attributable to	$	38,449	$	50,813		$	60,306
	II-VI Incorporated	$	38,449	$	50,813		$	60,306
	Divided by:
	Weighted average shares		62,248		62,411			62,823

	Basic earnings (loss) attributable to II-VI Incorporated
	per common share:
	Continuing operations	$	0.62	$	0.92		$	1.1
	Discontinued operation	$	-	$	(0.11	)	$	(0.15	)
	Consolidated	$	0.62	$	0.81		$	0.96

	Earnings from continuing operations attributable to	$	38,316	$	57,602		$	69,749
	II-VI Incorporated	$	38,316	$	57,602		$	69,749
	Earnings (loss) from discontinued operation	$	133		(6,789	)		(9,443	)
	Net Earnings from continuing operations attributable to	$	38,449	$	50,813		$	60,306
	II-VI Incorporated	$	38,449	$	50,813		$	60,306
	Divided by:
	Weighted average shares		62,248		62,411			62,823
	Diluted effect of common stock equivalents		1,438		1,473			1,562
	Diluted weighted average common shares		63,686		63,884			64,385

	Diluted earnings (loss) attributable to II-VI Incorporated
	per common share:
	Continuing operations	$	0.6	$	0.9		$	1.08
	Discontinued operation	$	-	$	(0.11	)	$	(0.15	)
	Consolidated	$	0.6	$	0.8		$	0.94

Operating_Leases_Tables

Operating Leases (Tables)	12 Months Ended
Operating Leases (Tables)	Jun. 30, 2014
Operating Lease Future Rental Commitments	'
	Future rental commitments applicable to the operating leases at June 30, 2014 are as follows:
	Year Ending June 30,
	$0
	2015	$	13,298
	2016		10,056
	2017		7,191
	2018		5,158
	2019		1,990
	Thereafter		18,795

ShareBased_Compensation_Plans_

Share-Based Compensation Plans (Tables)	12 Months Ended
Share-Based Compensation Plans (Tables)	Jun. 30, 2014
Share-Based Compensation Expense by Award Type	'
	Share-based compensation expense for the fiscal years ended June 30, 2014, 2013 and 2012 is as follows ($000):

		Year Ended				Year Ended				Year Ended
		30-Jun-14				30-Jun-13				30-Jun-12

	Stock Options and Cash-Based Stock Appreciation Rights		5,818			$	5,046			$	6,025

	Restricted Share Awards and Cash-Based Restricted Share		4,868				4,411				2,945
	Unit Awards		4,868				4,411				2,945

	Performance Share Awards and Cash-Based Performance Share		2,311				3,200				2,614
	Unit Awards		2,311				3,200				2,614

		$	12,997			$	12,657			$	11,584

Schedule of Fair Value Assumptions under Stock Option Plan	'
	The Company utilized the Black-Scholes valuation model for estimating the fair value of stock option expense. During the fiscal years ended June 30, 2014, 2013 and 2012, the weighted-average fair value of options granted under the stock option plan was $8.21, $8.37 and $9.32, respectively, per option using the following assumptions:

	Year Ended June 30,		2014				2013				2012
	Risk-free interest rate			1.71	%			0.98	%			1.05	%
	Expected volatility			47	%			49	%			59	%
	Expected life of options		5.56 years				5.66 years				5.47 years
	Dividend yield		None				None				None

Stock Option and Cash-Based Stock Appreciation Rights Activity	'
	Stock option and cash-based stock appreciation rights activity during the fiscal year ended June 30, 2014 was as follows:

		Stock Options								Cash-Based Stock Appreciation Rights
		Number of				Weighted Average				Number of				Weighted Average
		Shares				Exercise Price				Rights				Exercise Price
	Outstanding - July 1, 2013		4,670,011			$	15.59				60,820			$	18.78
	Granted		612,180			$	18.38				58,470			$	17.88
	Exercised		(438,449	)		$	10.22				(460	)		$	18.93
	Forfeited and Expired		(139,188	)		$	18.51				(10,112	)		$	18.94
	Outstanding - June 30, 2014		4,704,554			$	16.37				108,718			$	18.28
	Exercisable - June 30, 2014		3,025,156			$	15.48				10,574			$	18.79

Share-Based Compensation Outstanding and Exercisable Options	'
	Outstanding and exercisable stock options at June 30, 2014 were as follows:

			Stock Options and Cash-Based Stock												Stock Options and Cash-Based Stock
			Appreciation Rights Outstanding												Appreciation Rights Exercisable
							Weighted				Weighted						Weighted		Weighted
			Number of				Average Remaining				Average				Number of		Average Remaining		Average
	Range of		Shares or				Contractual Term				Exercise				Shares or		Contractual Term		Exercise
	Exercise Prices		Rights				(Years)				Price				Rights		(Years)		Price
	$8.44-$12.80			1,331,888				3.05			$	10.7				1,233,668		2.88		10.59
	$13.17-$20.26			2,831,846				7			$	17.45				1,196,748		5.44		16.47
	$20.47-$27.18			649,538				4.37			$	23.52				605,314		4.18		23.49
				4,813,272				5.52			$	16.42				3,035,730		4.14		15.49

Restricted Share and Cash-Based Restricted Share Unit Activity	'
	Restricted share and cash-based restricted share unit activity during the fiscal year ended June 30, 2014, was as follows:

			Restricted Share Awards								Cash-Based Restricted Share Units
			Number of				Weighted Average				Number of				Weighted Average
			Shares				Grant Date Fair Value				Units				Grant Date Fair Value
	Nonvested - June 30, 2013			798,624			$	18.18				30,270			$	18.78
	Granted			223,760			$	17.26				39,880			$	17.05
	Vested			(195,707	)		$	19.19				-			$	-
	Forfeited			(42,642	)		$	18.29				(5,840	)		$	18.63
	Nonvested - June 30, 2014			784,035			$	17.66				64,310			$	17.72

Performance Share and Cash-Based Performance Share Unit Award Activity	'
	Performance share and cash-based performance share unit award activity relating to the plan during the year ended June 30, 2014, was as follows:

		Performance Share Awards								Cash-Based Performance Share Units
		Number of				Weighted Average				Number of				Weighted Average
		Shares				Grant Date Fair Value				Units				Grant Date Fair Value
	Nonvested - June 30, 2013		359,754			$	17.85				107,096			$	18.93
	Granted		105,900			$	19.37				2,150			$	19.37
	Vested		(77,656	)		$	17.53				-			$	-
	Forfeited		(55,818	)		$	17.56				(10,102	)		$	18.93
	Nonvested - June 30, 2014		332,180			$	18.46				99,144			$	18.94

Segment_and_Geographic_Reporti1

Segment and Geographic Reporting (Tables)	12 Months Ended
Segment and Geographic Reporting (Tables)	Jun. 30, 2014
Financial Information of Company's Operation by Segment	'
	The following tables summarize selected financial information of the Company’s operations by segment:

					Near-			Military			Advanced		Active
		Infrared			Infrared			&			Products		Optical
		Optics			Optics			Materials			Group		Products			Eliminations			Total
	$0
	2014
	Revenues	$	209,658		$	144,677		$	98,324		$	115,394	$	115,208		$	-		$	683,261
	Inter-segment revenues		1,608			2,406			6,514			6,388		563			(17,479	)		-
	Segment earnings (loss)		40,736			9,814			12,851			9,419		(26,334	)		-			46,486
	Interest expense		-			-			-			-		-			-			(4,479	)
	Other income, net		-			-			-			-		-			-			3,634
	Income taxes		-			-			-			-		-			-			(7,325	)
	Earnings from discontinued operation		-			-			-			-		-			-			133
	Net earnings		-			-			-			-		-			-			38,449
	Depreciation and amortization		9,174			16,764			8,111			9,947		9,102			-			53,098
	Segment assets		231,874			295,953			117,730			175,986		250,383			-			1,071,926
	Expenditures for property, plant and equipment		9,719			8,171			5,539			3,525		2,266			-			29,220
	Equity investment		-			-			-			11,589		-			-			11,589
	Goodwill		9,754			60,408			30,712			22,178		73,093			-			196,145

					Near-			Military			Advanced
		Infrared			Infrared			&			Products
		Optics			Optics			Materials			Group		Eliminations			Total
	$0
	2013
	Revenues	$	203,319		$	154,852		$	97,116		$	95,788	$	-		$	551,075
	Inter-segment revenues		2,618			896			4,853			5,311		(13,678	)		-
	Segment earnings		49,457			19,628			656			1,750					71,491
	Interest expense		-			-			-			-		-			(1,160	)
	Other income, net		-			-			-			-		-			7,155
	Income taxes		-			-			-			-		-			(18,766	)
	Loss from discontinued operation		-			-			-			-		-			(6,789	)
	Net earnings		-			-			-			-		-			51,931
	Depreciation and amortization		8,423			17,286			7,023			8,060		-			40,792
	Segment assets		238,700			307,431			139,923			177,748		-			863,802
	Expenditures for property, plant and equipment		5,812			9,170			3,909			6,314		-			25,205
	Equity investment		-			-			-			11,203		-			11,203
	Goodwill		9,677			60,269			30,712			22,694		-			123,352



					Near-			Military			Advanced
		Infrared			Infrared			&			Products
		Optics			Optics			Materials			Group		Eliminations			Total
	$0
	2012
	Revenues	$	201,611		$	140,001		$	100,235		$	74,556	$	-		$	516,403
	Inter-segment revenues		3,174			2,135			7,589			4,295		(17,193	)		-
	Segment earnings		51,095			14,060			7,925			8,442					81,522
	Interest expense		-			-			-			-		-			(212	)
	Other income, net		-			-			-			-		-			7,168
	Income taxes		-			-			-			-		-			(17,760	)
	Loss from discontinued operation		-			-			-			-		-			(9,443	)
	Net earnings		-			-			-			-		-			61,275
	Depreciation and amortization		8,480			15,803			5,957			4,283		-			34,523
	Expenditures for property, plant and equipment		8,072			12,249			11,983			10,493		-			42,797

Geographic Information for Revenues and Long-Lived Assets	'
	Geographic information for revenues from the country of origin, and long-lived assets from the country of origin, which include property, plant and equipment, net of related depreciation, and certain other long-term assets, is as follows:

			Revenues
	Year-Ended June 30,		2014			2013			2012
	$0
	United States		$	263,493		$	251,735		$	204,706
	Non-United States
	China			114,247			123,306			123,348
	Switzerland			70,260			10,268			11,714
	Germany			69,983			59,628			51,962
	Hong Kong			54,602			-			-
	Japan			38,110			29,462			35,915
	Vietnam			23,141			29,425			31,500
	Philippines			14,959			17,400			26,185
	Italy			8,897			7,593			7,214
	Singapore			8,273			6,280			7,238
	United Kingdom			7,148			6,865			6,026
	Belgium			6,578			5,821			6,010
	Australia			3,570			3,292			4,585
	Total Non-United States			419,768			299,340			311,697
			$	683,261		$	551,075		$	516,403





			Long-Lived Assets
	June 30,		2014			2013			2012
	$0
	United States		$	109,138		$	110,337		$	85,709
	Non-United States
	China			45,667			43,139			45,412
	Switzerland			22,524			5			10
	Germany			16,129			2,107			1,581
	Vietnam			9,107			10,081			10,278
	Philippines			6,205			7,207			8,692
	Hong Kong			5,111			-			-
	Other			2,218			3,244			4,143
	Total Non-United States			106,961			65,783			70,116
			$	216,099		$	176,120		$	155,825

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jun. 30, 2014
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 June 30, 2014 ($000):

		Fair Value Measurements at June 30, 2014 Using:
					Quoted
					Prices in
					Active		Significant
					Markets
					for		Other		Significant
					Identical		Observable		Unobservable
		June 30,2014			Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Liabilities:
	Contingent Earnout Arrangement	$	-		$	-	$	-	$	-
	Foreign currency forward contracts	$	54		$	-	$	54	$	-


		Fair Value Measurements at June 30, 2013 Using:
					Quoted
					Prices in
					Active		Significant
					Markets
					for		Other		Significant
					Identical		Observable		Unobservable
		June 30,2013			Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Liabilities:
	Contingent Earnout Arrangement	$	3,300		$	-	$	-	$	3,300
	Foreign currency forward contracts	$	23		$	-	$	23	$	-

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:

		Significant Other
		Unobservable Inputs
		(Level 3)
	Balance at June 30, 2013	$	3,300
	Payment of earnout arrangement		(3,000	)
	Changes in fair value		(300	)

	Balance at June 30, 2014	$	-

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Jun. 30, 2014
Schedule of Changes in Projected Benefit Obligations and Plan Assets	'


	The funded status of the Swiss Plan in the fiscal year ended June 30, 2014 was as follows:

		Year Ended
		30-Jun-14
	Change in projected benefit obligation:
	Projected benefit obligation, date of acquisition	$	38,748
	Service cost		3,375
	Interest cost		812
	Plan amendments		(1,661	)
	Participant contributions		1,110
	Benefits (paid) received		(3,959	)
	Actuarial (gain) loss on obligation		(867	)
	Currency translation adjustment		1,832
	Projected benefit obligation, end of period	$	39,390
	Change in plan assets:
	Plan assets at fair value, date of acquisition		30,167
	Actual return on plan assets		776
	Employer contributions		2,253
	Participant contributions		1,110
	Benefits (paid) received		(3,959	)
	Currency translation adjustment		1,617
	Plan assets at fair value, end of period	$	31,965
	Amounts recognized in consolidated balance sheets:
	Other non-current assets:
	Deferred tax asset	$	1,570
	Other non-current liabilities:
	Underfunded pension liability	$	7,425
	Amounts recognized in accumulated other comprehensive
	income, net of tax:
	Pension adjustment	$	1,443
	Accumulated benefit obligation, end of period	$	35,581

Schedule of Net Periodic Pension Costs	'
	Net periodic pension cost associated with the Swiss Plan in the fiscal year ended June 30, 2014 included the following components:

		Year Ended
		30-Jun-14
	Service cost	$	3,375
	Interest cost		812
	Expected return on plan assets		(1,338	)
	Net amortization		-
	Net period pension cost	$	2,849

Schedule of Projected and Accumulated Benefit Obligations Rates	'


	The projected and accumulated benefit obligations for the Swiss Plan were calculated as of June 30, 2014 using the following assumptions:

		Year Ended
		30-Jun-14
	Discount rate		2	%
	Salary increase rate		2	%
	Expected return on plan assets		3.5	%
	Expected average remaining working life (in years)		13.1

Schedule of Swiss Plan's Asset Allocation	'
	The Swiss Plan is legally separate from II-VI, as are the assets of the plan. As of June 30, 2014, the Swiss Plan’s asset allocation was as follows:

		Year Ended
		30-Jun-14
	Fixed income investments		22	%
	Equity investments		54	%
	Real estate		14	%
	Cash		8	%
	Alternative investments		2	%
			100	%

Other_Accrued_Liabilities_Tabl

Other Accrued Liabilities (Tables)	12 Months Ended
Other Accrued Liabilities (Tables)	Jun. 30, 2014
Components of Other Accrued Liabilities	'
	The components of other accrued liabilities were as follows:

	June 30,	2014			2013
	$0
	Acquisition holdbacks	$	10,000		$	-
	Redeemable noncontrolling interest liability		-			8,568
	Earnout arrangement		-			3,300
	Warranty reserve		2,859			1,661
	Other accrued liabilities		18,662			21,166
		$	31,521		$	34,695

Changes in the Carrying Amount of Redeemable Noncontrolling Interest	'
	Changes in the carrying amount of our redeemable noncontrolling interest were as follows:

	Year Ended June 30,	2014			2013			2012
	$0
	Balance at Beginning of Year	$	-		$	5,160		$	1,828
	Net earnings attributable to redeemable noncontrolling interest		-			1,118			969
	Other changes		-			(585	)		(267	)
	Redemption value adjustment to redeemable noncontrolling interest		-			2,875			2,630
	Reclassification of redeemable noncontrolling interest to Other accrued liabilities		-			(8,568	)		-
	Balance at End of Year	$	-		$	-		$	5,160

Change in Carrying Value of Company's Warranty Reserve	'
	The following table summarizes the change in the carrying value of the company’s warranty reserve included in Other Accrued Liabilities as of and for the year ended June 30, 2014.

	Year Ended June 30,	2014
	$0
	Balance-Beginning of Year	$	1,661
	Settlements during the period		(1,843	)
	Additional warranty liability recorded		1,868
	Warranty liability assumed through acquisitions		1,173
	Balance-End of Year	$	2,859

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Jun. 30, 2014
Schedule of Future Commitments	'
	Total future commitments are as follows:
	Year Ending June 30,
	$0
	2015	$	15,906
	2016		489
	2017		488
	2018		-
	2019	$	-

Capital_Lease_Tables

Capital Lease (Tables)	12 Months Ended
Capital Lease (Tables)	Jun. 30, 2014
Schedule of Future Minimum Lease Payments Due Under Non-Cancelable Capital Lease	'
	The following table shows the future minimum lease payments due under the non-cancelable capital lease ($000):

	Fiscal Year Ending:	Amount
	2015	$	1,071
	2016		1,071
	2017		1,071
	2018		1,071
	2019		1,071
	Thereafter		12,228

	Total minimum lease payments		17,583
	Less amount representing interest		5,947

	Present value of capitalized payments		11,636
	Less: current portion		453

	Long-term portion	$	11,183

Quarterly_Financial_Data_Table

Quarterly Financial Data (Tables)	12 Months Ended
Quarterly Financial Data (Tables)	Jun. 30, 2014
Quarterly Financial Data	'
	Fiscal 2014

		September 30,			December 31,			March 31,			June 30,
	Quarter Ended	2013			2013			2014			2014
	$0
	2014
	Net revenues	$	150,020		$	171,765		$	173,555		$	187,921
	Cost of goods sold		93,709			118,371			118,865			125,600
	Internal research and development		7,747			11,355			12,099			11,322
	Selling, general and administrative		35,093			32,471			33,848			36,295
	Interest expense		483			1,169			1,412			1,415
	Other expense (income) - net		53			(1,125	)		(1,694	)		(868	)
	Earnings from continuing operations before income taxes		12,935			9,524			9,025			14,157
	Income taxes		3,243			2,086			494			1,502
	Earnings from continuing operations		9,692		$	7,438		$	8,531		$	12,655
	Earnings (loss) from discontinued operations, net of income taxes		2		$	131		$	-		$	-
	Net Earnings Attributable to II-VI Incorporated	$	9,694		$	7,569		$	8,531		$	12,655
	Net Earnings Attributable to II-VI Incorporated: Basic earnings
	per share:
	Continuing operations	$	0.16		$	0.12		$	0.14		$	0.21
	Discontinued operation	$	0		$	-		$	-		$	-
	Consolidated	$	0.16		$	0.12		$	0.14		$	0.21
	Net Earnings Attributable to II-VI Incorporated: Diluted earnings
	per share:
	Continuing operations	$	0.15		$	0.12		$	0.13		$	0.20
	Discontinued operation	$	0		$	-		$	-		$	-
	Consolidated	$	0.15		$	0.12		$	0.13		$	0.2
	Fiscal 2013

		September 30,			December 31,			March 31,			June 30,
	Quarter Ended	2012			2012			2013			2013
	$0
	2013
	Net revenues	$	127,998		$	125,107		$	143,940		$	154,030
	Cost of goods sold		77,599			77,839			92,986			99,134
	Internal research and development		5,585			5,626			5,781			5,697
	Selling, general and administrative		26,356			26,174			27,004			29,803
	Interest expense		36			223			449			452
	Other expense (income) - net		(761	)		(4,551	)		(1,401	)		(442	)
	Earnings from continuing operations before income taxes		19,183			19,796			19,121			19,386
	Income taxes		4,262			6,721			2,861			4,922
	Earnings from continuing operations		14,921		$	13,075		$	16,260		$	14,464
	Earnings (loss) from discontinued operations, net of income taxes		(1,789	)	$	(608	)	$	(166	)	$	(4,226	)
	Net Earnings		13,132		$	12,467		$	16,094		$	10,238
	Net Earnings Attributable to Noncontrolling Interest		414		$	267		$	225		$	212
	Net Earnings Attributable to II-VI Incorporated	$	12,718		$	12,200		$	15,869		$	10,026
	Net Earnings Attributable to II-VI Incorporated: Basic earnings
	per share:
	Continuing operations	$	0.23		$	0.2		$	0.26		$	0.23
	Discontinued operation	$	(0.03	)	$	(0.01	)	$	(0.00	)	$	(0.07	)
	Consolidated	$	0.2		$	0.19		$	0.26		$	0.16
	Net Earnings Attributable to II-VI Incorporated: Diluted earnings
	per share:
	Continuing operations	$	0.23		$	0.2		$	0.25		$	0.22
	Discontinued operation	$	(0.03	)	$	(0.01	)	$	(0.00	)	$	(0.07	)
	Consolidated	$	0.2		$	0.19		$	0.25		$	0.16

Nature_of_Business_and_Summary2

Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Significant Accounting Policies [Line Items]	'	'	'
Accounts receivable factored	$12,700,000	$8,500,000	'
Inventory reserve amount	12,000,000	7,100,000	'
Total carrying value of equity method investment	11,589,000	11,203,000	'
Pro-rata share of loss from equity method investment	698,000	1,048,000	1,059,000
Loss contingency liability	0	'	'
Allowance for doubtful accounts	1,852,000	1,479,000	'
Allowance for warranty reserve	2,859,000	1,661,000	'
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection	10.00%	'	'
Maximum percentage of contract related revenues	5.00%	'	'
Accumulated foreign currency translation adjustments, net of income taxes	18,000,000	15,600,000	'
Accumulated pension adjustments, net of income taxes	1,400,000	'	'
Guangdong Fuxin Electronic Technology	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Non-controlling minority interest	20.20%	'	'
Pro-rata share of loss from equity method investment	700,000	1,000,000	1,300,000
Dividends from equity investment	$300,000	$500,000	'
Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Finite-lived intangible assets useful life, years	'7 years	'	'
Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Finite-lived intangible assets useful life, years	'18 years	'	'
Building improvements and land improvements \| Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment estimated useful lives, years	'10 years	'	'
Building improvements and land improvements \| Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment estimated useful lives, years	'20 years	'	'
Machinery and equipment \| Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment estimated useful lives, years	'3 years	'	'
Machinery and equipment \| Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment estimated useful lives, years	'12 years	'	'

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Sep. 12, 2013	Nov. 30, 2013	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Jun. 30, 2014
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro Incorporated	Oclaro Incorporated	Acquisitions of Two Oclaro
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Net cash paid at acquisition date	$177,676,000	$126,193,000	$46,141,000	$5,000,000	$79,600,000	'	$90,601,000	'	'
Purchase of business - holdback amount recorded in other liabilities	'	'	'	'	4,000,000	'	6,000,000	2,000,000	'
Goodwill	196,145,000	123,352,000	80,748,000	'	35,586,000	'	37,507,000	'	'
Business acquisition, revenue of acquired entity	'	'	'	'	'	53,400,000	'	61,800,000	'
Business acquisition, earnings of acquired entity	'	'	'	'	'	2,600,000	'	17,400,000	'
Business acquisition, cash acquired	'	'	'	'	'	'	1,700,000	'	'
Payment of additional amount for working capital adjustment	'	'	'	'	'	'	2,475,000	'	'
Business acquisition, transaction costs	'	'	'	'	'	'	'	3,700,000	3,700,000
Business acquisition, transaction costs, tax amount	'	'	'	'	'	'	'	$200,000	'

Summary_of_Purchase_Price_Deta

Summary of Purchase Price (Detail) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Sep. 12, 2013	Nov. 30, 2013	Sep. 30, 2013	Jun. 30, 2014
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro Incorporated	Oclaro Incorporated
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Net cash paid at acquisition date	$177,676,000	$126,193,000	$46,141,000	$5,000,000	$79,600,000	$90,601,000	'
Purchase of business - holdback amount recorded in other liabilities	'	'	'	'	4,000,000	6,000,000	2,000,000
Purchase price	'	'	'	'	88,600,000	99,076,000	'
Additional cash paid for working capital adjustment	'	'	'	'	'	$2,475,000	'

Allocation_of_Purchase_Price_o

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed at Date of Acquisition (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Nov. 30, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Oclaro's Fiber Amplifier and Micro Optics Business	Oclaro Incorporated
Assets	'	'	'	'	'
Inventories	'	'	'	$11,314	$26,071
Prepaid and other assets	'	'	'	'	1,035
Deferred income taxes	'	'	'	'	1,771
Property, plant & equipment	'	'	'	9,700	30,184
Intangible assets	'	'	'	32,000	28,900
Goodwill	196,145	123,352	80,748	35,586	37,507
Total assets acquired	'	'	'	88,600	125,468
Total assets acquired	'	'	'	88,600	125,468
Liabilities	'	'	'	'	'
Accounts payable	'	'	'	'	2,214
Deferred income taxes	'	'	'	'	8,647
Accrued income taxes	'	'	'	'	2,714
Other accrued liabilities	'	'	'	'	12,817
Total liabilities assumed	'	'	'	'	26,392
Net assets acquired	'	'	'	'	$99,076

Proforma_Consolidated_Results_

Pro-forma Consolidated Results of Operations (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]	'	'
Net revenues	$734,912	$732,474
Net earnings attributable to II-VI Incorporated	$47,054	$44,693
Basic earnings per share	$0.76	$0.72
Diluted earnings per share	$0.75	$0.70

Summary_of_Revenues_and_Earnin

Summary of Revenues and Earnings (Losses) of Discontinued Operation (Detail) (USD $)	3 Months Ended						12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Disposal Group, Including Discontinued Operation, Income Statement Disclosures	'	'	'	'	'	'	'	'	'
Earnings (loss) from discontinued operation net income taxes	$131	$2	($4,226)	($166)	($608)	($1,789)	$133	($6,789)	($9,443)
Tellurium product line	'	'	'	'	'	'	'	'	'
Disposal Group, Including Discontinued Operation, Income Statement Disclosures	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	1,849	7,321	18,227
Earnings (loss) from discontinued operation before income taxes	'	'	'	'	'	'	133	-6,789	-9,583
Income tax benefit	'	'	'	'	'	'	'	'	140
Earnings (loss) from discontinued operation net income taxes	'	'	'	'	'	'	$133	($6,789)	($9,443)

Components_of_Inventories_Net_

Components of Inventories, Net of Reserves (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Inventory [Line Items]	'	'
Raw materials	$71,949	$59,290
Work in process	44,739	43,895
Finished goods	49,185	38,674
Inventories, Total	$165,873	$141,859

Property_Plant_and_Equipment_D

Property Plant and Equipment (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Property Plant And Equipment [Line Items]	'	'
Land and improvements	$2,381	$2,236
Buildings and improvements	96,551	87,189
Machinery and equipment	335,408	276,802
Construction in progress	16,990	10,831
Property, Plant and Equipment, gross	451,330	377,058
Less accumulated depreciation	-242,391	-206,386
Property, Plant and Equipment, net	$208,939	$170,672

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Property Plant And Equipment [Line Items]	'	'	'
Depreciation expense	$41,805	$34,135	$30,072

Changes_in_Carrying_Amount_of_

Changes in Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Goodwill [Line Items]	'	'
Balance-beginning of period	$123,352	$80,748
Goodwill acquired	73,093	41,746
Goodwill adjustment	-516	'
Foreign currency translation	216	858
Balance-end of period	196,145	123,352
Infrared Optics \| Operating Segments	'	'
Goodwill [Line Items]	'	'
Balance-beginning of period	9,677	9,612
Foreign currency translation	77	65
Balance-end of period	9,754	9,677
Near-Infrared Optics \| Operating Segments	'	'
Goodwill [Line Items]	'	'
Balance-beginning of period	60,269	48,496
Goodwill acquired	'	10,980
Foreign currency translation	139	793
Balance-end of period	60,408	60,269
Military & Materials \| Operating Segments	'	'
Goodwill [Line Items]	'	'
Balance-beginning of period	'	12,326
Goodwill acquired	'	18,386
Balance-end of period	30,712	30,712
Advanced Products Group \| Operating Segments	'	'
Goodwill [Line Items]	'	'
Balance-beginning of period	22,694	10,314
Goodwill acquired	'	12,381
Goodwill adjustment	-516	'
Balance-end of period	22,178	22,694
Active Optical Products \| Operating Segments	'	'
Goodwill [Line Items]	'	'
Goodwill acquired	73,093	'
Balance-end of period	$73,093	'

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)

12 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2012

Jun. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Trade Names

Minimum

Maximum

Patents

Customer Lists

Oclaro Incorporated

Minimum

Maximum

Minimum

Maximum

Customer Lists

Technology and Patents

Goodwill And Other Intangible Assets [Line Items]

Goodwill adjustment

($516,000)

Goodwill

196,145,000

123,352,000

80,748,000

37,507,000

Percentage of fair value greater than carrying value

9.00%

Amortization expense recorded on intangible assets

11,300,000

6,700,000

4,500,000

Amortization period of patents and customer lists, in months

'7 years

'18 years

'118 months

'60 months

'240 months

'150 months

'120 months

'192 months

Identifiable intangibles assets recorded in connection with acquisitions

28,900,000

50,100,000

10,800,000

Carrying amount of trade names acquired

$16,400,000

Gross_Carrying_Amount_and_Accu

Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Finite Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$172,800	$111,708
Accumulated Amortization	-36,396	-25,007
Net Book Value	136,404	86,701
Technology and Patents	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	50,505	39,659
Accumulated Amortization	-14,474	-10,455
Net Book Value	36,031	29,204
Trademarks	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	17,870	17,855
Accumulated Amortization	-1,037	-963
Net Book Value	16,833	16,892
Customer Lists	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	102,839	52,614
Accumulated Amortization	-19,448	-12,189
Net Book Value	83,391	40,425
Other	'	'
Finite Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	1,586	1,580
Accumulated Amortization	-1,437	-1,400
Net Book Value	$149	$180

Estimated_Amortization_Expense

Estimated Amortization Expense for Existing Intangible Assets for Each of Five Succeeding Years (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified	Jun. 30, 2014
Finite Lived Intangible Assets [Line Items]	'
2015	$11,716
2016	11,619
2017	11,609
2018	11,140
2019	$10,715

Components_of_Debt_Detail

Components of Debt (Detail) (USD $)	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
Debt Instrument [Line Items]	'	'	'
Line of credit, interest at LIBOR, as defined, plus 1.75% and1.25%, respectively	$154,000	'	$111,000
Term loan, interest at LIBOR, as defined, plus 1.25%	85,000	100,000	'
Yen denominated line of credit, interest at LIBOR, as defined,plus 0.625%	2,960	'	3,036
Total debt	241,960	'	114,036
Current portion of long-term debt	-20,000	'	'
Long-term debt, less current portion	$221,960	'	$114,036

Components_of_Debt_Parenthetic

Components of Debt (Parenthetical) (Detail) (London Interbank Offered Rate (LIBOR))	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Line of credit	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	1.75%	1.25%
Term loans	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	1.25%	1.25%
Yen denominated line of credit	'	'
Debt Instrument [Line Items]	'	'
Debt instrument, rate added on variable rate	0.63%	0.63%

Debt_Additional_Information_De

Debt - Additional Information (Detail)

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Sep. 30, 2013

Jun. 30, 2014

Sep. 30, 2013

Jun. 30, 2014

Sep. 30, 2013

USD ($)

Singapore Bank

Revolving Credit Facility

Yen denominated line of credit

London Interbank Offered Rate (LIBOR)

Prime Rate

Maximum

Minimum

USD ($)

JPY (¥)

Yen denominated line of credit

Singapore Bank

Revolving Credit Facility

London Interbank Offered Rate (LIBOR)

USD ($)

Revolving Credit Facility

Debt Instrument [Line Items]

Line of credit, maximum borrowing capacity

$300,000

$400,000

$225,000,000

Line of credit facility, prior borrowing capacity

140,000,000

Term loan

100,000,000

85,000,000

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

0.63%

1.00%

1.50%

1.75%

0.63%

0.75%

Financing cost incurred

1,000,000

Deferred financing costs

500,000

Credit facility

500,000,000

Aggregate amount available under lines of credit

71,000,000

29,800,000

Total outstanding letters of credit

1,900,000

1,300,000

Weighted average interest rate of total borrowings

1.80%

1.40%

Weighted average of total borrowings

222,600,000

82,500,000

Weighted average interest rate of borrowings

5.25%

Credit facility, interest paid

4,200,000

1,100,000

Credit facility, commitment fees paid

$4,200,000

$1,100,000

Components_of_Income_Loss_from

Components of Income (Loss) from Continuing Operations Before Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Loss From Continuing Operations Before Income Taxes [Line Items]	'	'	'	'	'	'	'	'	'	'	'
U.S. income (loss)	'	'	'	'	'	'	'	'	($2,863)	$19,253	$16,025
Non-U.S. income	'	'	'	'	'	'	'	'	48,504	58,233	72,453
Earnings from Continuing Operations Before Income Taxes	$14,157	$9,025	$9,524	$12,935	$19,386	$19,121	$19,796	$19,183	$45,641	$77,486	$88,478

Components_of_Income_Tax_Expen

Components of Income Tax Expense (Benefit) (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Tax Expenses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Current, Federal	'	'	'	'	'	'	'	'	($1,067)	$2,759	$283
Current, State	'	'	'	'	'	'	'	'	152	68	227
Current, Foreign	'	'	'	'	'	'	'	'	12,675	13,977	16,673
Total Current	'	'	'	'	'	'	'	'	11,760	16,804	17,183
Deferred, Federal	'	'	'	'	'	'	'	'	-16	1,721	3,409
Deferred, State	'	'	'	'	'	'	'	'	148	113	-356
Deferred, Foreign	'	'	'	'	'	'	'	'	-4,567	128	-2,476
Total Deferred	'	'	'	'	'	'	'	'	-4,435	1,962	577
Total Income Tax Expense	$1,502	$494	$2,086	$3,243	$4,922	$2,861	$6,721	$4,262	$7,325	$18,766	$17,760

Schedule_of_Principal_Items_Co

Schedule of Principal Items Comprising Deferred Income Taxes (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Significant Components Of Deferred Income Tax Expense [Line Items]	'	'
Inventory capitalization	$5,402	$6,333
Non-deductible accruals	1,926	1,930
Accrued employee benefits	9,226	6,790
Net-operating loss and credit carryforwards	21,976	22,849
Share-based compensation expense	16,005	15,021
Other	577	205
Valuation allowances	-2,212	-2,885
Total deferred income tax assets	52,900	50,243
Tax over book accumulated depreciation	-17,625	-16,988
Intangible assets	-25,505	-21,561
Other	-2,786	-2,409
Total deferred income tax liabilities	-45,916	-40,958
Net deferred income taxes	$6,984	$9,285

Schedule_of_Reconciliation_of_

Schedule of Reconciliation of Income Tax Expense at Statutory Federal Rate to Reported Income Tax Expense (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Tax Rate Reconciliation [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Taxes at statutory rate, amount	'	'	'	'	'	'	'	'	$15,974	$27,120	$30,967
State income taxes-net of federal benefit, amount	'	'	'	'	'	'	'	'	254	168	-187
Taxes on non U.S. earnings, amount	'	'	'	'	'	'	'	'	-6,672	-6,991	-9,841
Settlement of unrecognized tax benefits, amount	'	'	'	'	'	'	'	'	'	'	-842
Research and manufacturing incentive deductions, amount	'	'	'	'	'	'	'	'	-2,190	-1,458	-2,079
Other, amount	'	'	'	'	'	'	'	'	-41	-73	-258
Total Income Tax Expense	$1,502	$494	$2,086	$3,243	$4,922	$2,861	$6,721	$4,262	$7,325	$18,766	$17,760
Taxes at statutory rate	'	'	'	'	'	'	'	'	35.00%	35.00%	35.00%
State income taxes-net of federal benefit, rate	'	'	'	'	'	'	'	'	1.00%	'	'
Taxes on non U.S. earnings, rate	'	'	'	'	'	'	'	'	-15.00%	-9.00%	-11.00%
Settlement of unrecognized tax benefits, rate	'	'	'	'	'	'	'	'	'	'	-1.00%
Research and manufacturing incentive deductions, rate	'	'	'	'	'	'	'	'	-5.00%	-2.00%	-3.00%
Total Effective Income Tax, rate	'	'	'	'	'	'	'	'	16.00%	24.00%	20.00%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Taxes [Line Items]	'	'	'
Cash paid for income taxes	$17,200,000	$11,900,000	$13,200,000
Cumulative foreign undistributed net earnings	366,000,000	'	'
Additional deferred tax liability due to undistributed foreign earnings	74,000,000	'	'
Interest and penalties recognized within income tax expense (benefit)	0	100,000	-200,000
Interest and penalties accrued	200,000	200,000	100,000
Unrecognized tax benefits that would impact effective tax rate	2,800,000	3,200,000	'
Unrecognized tax benefits expected decrease during the next twelve months	1,400,000	'	'
Settlement of unrecognized tax benefits, amount	'	'	$842,000
Income tax examination, year(s) under examination	'2010	'	'

Schedule_of_Sources_of_Differe

Schedule of Sources of Differences Resulting in Deferred Income Tax Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Significant Components Of Deferred Income Tax Expense [Line Items]	'	'	'
Depreciation and amortization	($3,581)	($2,825)	$38
Inventory capitalization	646	84	-1,947
Net operating loss and credit carryforwards net of valuation allowances	533	4,786	1,859
Share-based compensation expense	-984	-3,487	-2,442
Other	-1,049	3,404	3,069
Nondeductible expense, total	($4,435)	$1,962	$577

Schedule_of_Gross_Operating_Lo

Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Federal research and development credits	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards	4,117
Federal research and development credits \| Minimum	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards, expiration date	'June 2019
Federal research and development credits \| Maximum	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards, expiration date	'June 2034
State Tax Credits	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards	2,827
State Tax Credits \| Minimum	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards, expiration date	'June 2014
State Tax Credits \| Maximum	'
Operating Loss Carryforwards [Line Items]	'
Tax credit carryforwards, expiration date	'June 2029
Federal	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards	36,124
Federal \| Minimum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2022
Federal \| Maximum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2029
State	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards	25,116
State \| Minimum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2014
State \| Maximum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2034
Foreign	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards	9,427
Foreign \| Minimum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2016
Foreign \| Maximum	'
Operating Loss Carryforwards [Line Items]	'
Loss carryforwards, expiration date	'June 2022

Schedule_of_Changes_in_Liabili

Schedule of Changes in Liability for Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]	'	'	'
Balance at Beginning of Year	$3,181	$2,850	$4,744
Increases in current year tax positions	298	338	738
Increases in prior year tax positions	2	'	'
Decreases in prior year tax positions	'	-7	-41
Settlements	'	'	-1,788
Expiration of statute of limitations	-706	'	-803
Balance at End of Year	$2,775	$3,181	$2,850

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	12 Months Ended
Earnings Per Share - Additional Information (Detail)	Jun. 30, 2014	Jun. 30, 2013	Jun. 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	507,000	470,000	220,000

Computation_of_Earnings_Per_Sh

Computation of Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Earnings from continuing operations attributable to II-VI Incorporated	'	'	'	'	'	'	'	'	$38,316	$57,602	$69,749
Earnings (loss) from discontinued operation	'	'	131	2	-4,226	-166	-608	-1,789	133	-6,789	-9,443
Net Earnings Attributable to II-VI Incorporated	$12,655	$8,531	$7,569	$9,694	$10,026	$15,869	$12,200	$12,718	$38,449	$50,813	$60,306
Weighted average shares	'	'	'	'	'	'	'	'	62,248	62,411	62,823
Basic earnings (loss) attributable to II-VI Incorporated per common share:	'	'	'	'	'	'	'	'	'	'	'
Continuing operations	$0.21	$0.14	$0.12	$0.16	$0.23	$0.26	$0.20	$0.23	$0.62	$0.92	$1.10
Discontinued operation	'	'	'	$0	($0.07)	$0	($0.01)	($0.03)	'	($0.11)	($0.15)
Consolidated	$0.21	$0.14	$0.12	$0.16	$0.16	$0.26	$0.19	$0.20	$0.62	$0.81	$0.96
Diluted effect of common stock equivalents	'	'	'	'	'	'	'	'	1,438	1,473	1,562
Diluted weighted average common shares	'	'	'	'	'	'	'	'	63,686	63,884	64,385
Diluted earnings (loss) attributable to II-VI Incorporated per common share:	'	'	'	'	'	'	'	'	'	'	'
Continuing operations	$0.20	$0.13	$0.12	$0.15	$0.22	$0.25	$0.20	$0.23	$0.60	$0.90	$1.08
Discontinued operation	'	'	'	$0	($0.07)	$0	($0.01)	($0.03)	'	($0.11)	($0.15)
Consolidated	$0.20	$0.13	$0.12	$0.15	$0.16	$0.25	$0.19	$0.20	$0.60	$0.80	$0.94

Operating_Leases_Additional_In

Operating Leases - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Operating Leased Assets [Line Items]	'	'	'
Operating leases expiration date	31-Jul-61	'	'
Rent expense	$13.60	$9.80	$7.60

Operating_Lease_Future_Rental_

Operating Lease Future Rental Commitments (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified	Jun. 30, 2014
Operating Leased Assets [Line Items]	'
2015	$13,298
2016	10,056
2017	7,191
2018	5,158
2019	1,990
Thereafter	$18,795

ShareBased_Compensation_Plans_1

Share-Based Compensation Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'
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%	'	'
Share based compensation expense	$12,997,000	$12,657,000	$11,584,000
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, outstanding	5,200,000	9,700,000	14,600,000
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, exercised	5,200,000	9,700,000	14,600,000
Total intrinsic value of stock options and cash-based stock appreciation rights, exercised	3,100,000	2,900,000	4,500,000
Unrecognized compensation cost, weighted-average period of recognition, years	'3 years	'	'
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	5,818,000	5,046,000	6,025,000
Weighted-average fair values of stock options granted under the stock option Plan	$8.21	$8.37	$9.32
Share based compensation, estimated forfeiture percentage	16.00%	'	'
Share based compensation expense attributable to non-vested shares	9,400,000	'	'
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	4,868,000	4,411,000	2,945,000
Share based compensation, estimated forfeiture percentage	7.50%	'	'
Share based compensation, vesting period years	'3 years	'	'
Restricted Stock	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'
Share based compensation expense attributable to non-vested shares	5,700,000	'	'
Unrecognized compensation cost, weighted-average period of recognition, years	'2 years	'	'
Total fair value of restricted stock grant	4,500,000	7,000,000	5,500,000
Total fair value of restricted stock vested	3,800,000	700,000	'
Performance Shares	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'
Share based compensation expense attributable to non-vested shares	3,300,000	'	'
Unrecognized compensation cost, weighted-average period of recognition, years	'2 years	'	'
Total fair value of restricted stock grant	2,100,000	5,900,000	3,300,000
Total fair value of restricted stock vested	1,300,000	2,600,000	1,600,000
Liability Awards	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'
Share based compensation expense	$700,000	$700,000	'
Omnibus Incentive Plan	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'
Common stock authorized for issuance under the Plan	1,900,000	'	'
Shares available to be issued under the Plan	1,242,317	'	'

ShareBased_Compensation_Expens

Share-Based Compensation Expense by Award Type (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Share based compensation expense	$12,997	$12,657	$11,584
Stock Options and Cash-Based Stock Appreciation Rights	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Share based compensation expense	5,818	5,046	6,025
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	4,868	4,411	2,945
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	$2,311	$3,200	$2,614

Fair_Value_Assumptions_for_Sto

Fair Value Assumptions for Stock Option and Stock Appreciation Rights (Detail)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Fair Value Option [Line Items]	'	'	'
Risk-free interest rate	1.71%	0.98%	1.05%
Expected volatility	47.00%	49.00%	59.00%
Expected life of options	'5 years 6 months 22 days	'5 years 7 months 28 days	'5 years 5 months 19 days
Dividend yield	0.00%	0.00%	0.00%

Stock_Option_and_CashBased_Sto

Stock Option and Cash-Based Stock Appreciation Rights Activity (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014
Number of Shares	'
Outstanding - July 1, 2013	4,670,011
Granted	612,180
Exercised	-438,449
Forfeited and Expired	-139,188
Outstanding - June 30, 2014	4,704,554
Exercisable - June 30, 2014	3,025,156
Weighted Average Exercise Price	'
Outstanding - July 1, 2013	$15.59
Granted	$18.38
Exercised	$10.22
Forfeited and Expired	$18.51
Outstanding - June 30, 2014	$16.37
Exercisable - June 30, 2014	$15.48
Cash-Based Stock Appreciation Rights	'
Number of Shares	'
Outstanding - July 1, 2013	60,820
Granted	58,470
Exercised	-460
Forfeited and Expired	-10,112
Outstanding - June 30, 2014	108,718
Exercisable - June 30, 2014	10,574
Weighted Average Exercise Price	'
Outstanding - July 1, 2013	$18.78
Granted	$17.88
Exercised	$18.93
Forfeited and Expired	$18.94
Outstanding - June 30, 2014	$18.28
Exercisable - June 30, 2014	$18.79

ShareBased_Compensation_Outsta

Share-Based Compensation Outstanding and Exercisable Options (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014
Stock Options and Cash-Based Stock Appreciation Rights	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Number of Shares	4,813,272
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	'5 years 6 months 7 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$16.42
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares	3,035,730
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	'4 years 1 month 21 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$15.49
$8.44-$12.80	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower range	$8.44
Range of Exercise Prices, Upper range	$12.80
$8.44-$12.80 \| Stock Options and Cash-Based Stock Appreciation Rights	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Number of Shares	1,331,888
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	'3 years 18 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$10.70
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares	1,233,668
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	'2 years 10 months 17 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$10.59
$13.17-$20.26	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower range	$13.17
Range of Exercise Prices, Upper range	$20.26
$13.17-$20.26 \| Stock Options and Cash-Based Stock Appreciation Rights	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Number of Shares	2,831,846
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	'7 years
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$17.45
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares	1,196,748
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	'5 years 5 months 9 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$16.47
$20.47-$27.18	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Range of Exercise Prices, Lower range	$20.47
Range of Exercise Prices, Upper range	$27.18
$20.47-$27.18 \| Stock Options and Cash-Based Stock Appreciation Rights	'
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]	'
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Number of Shares	649,538
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	'4 years 4 months 13 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$23.52
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares	605,314
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	'4 years 2 months 5 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$23.49

Restricted_Share_and_CashBased

Restricted Share and Cash-Based Restricted Share Unit Activity (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014
Restricted Stock	'
Number of Shares	'
Nonvested - June 30, 2013	798,624
Granted	223,760
Vested	-195,707
Forfeited	-42,642
Nonvested - June 30, 2014	784,035
Weighted Average Grant Date Fair Value	'
Nonvested - June 30, 2013	$18.18
Granted	$17.26
Vested	$19.19
Forfeited	$18.29
Nonvested - June 30, 2014	$17.66
Cash-Based Restricted Share Units	'
Number of Shares	'
Nonvested - June 30, 2013	30,270
Granted	39,880
Forfeited	-5,840
Nonvested - June 30, 2014	64,310
Weighted Average Grant Date Fair Value	'
Nonvested - June 30, 2013	$18.78
Granted	$17.05
Forfeited	$18.63
Nonvested - June 30, 2014	$17.72

Performance_Share_Award_Activi

Performance Share Award Activity (Detail) (USD $)	12 Months Ended
Performance Share Award Activity (Detail) (USD $)	Jun. 30, 2014
Performance Shares	'
Number of Shares	'
Nonvested - June 30, 2013	359,754
Granted	105,900
Vested	-77,656
Forfeited	-55,818
Nonvested - June 30, 2014	332,180
Performance Share Awards	'
Weighted Average Grant Date Fair Value	'
Nonvested - June 30, 2013	17.85
Granted	19.37
Vested	17.53
Forfeited	17.56
Nonvested - June 30, 2014	18.46
Cash-Based Performance Share Units	'
Number of Shares	'
Nonvested - June 30, 2013	107,096
Granted	2,150
Forfeited	-10,102
Nonvested - June 30, 2014	99,144
Weighted Average Grant Date Fair Value	'
Nonvested - June 30, 2013	18.93
Granted	19.37
Forfeited	18.93
Nonvested - June 30, 2014	18.94

Financial_Information_of_Compa

Financial Information of Company's Operation by Segment (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	$187,921	$173,555	$171,765	$150,020	$154,030	$143,940	$125,107	$127,998	$683,261	$551,075	$516,403
Segment earnings (loss)	'	'	'	'	'	'	'	'	46,486	71,491	81,522
Interest expense	-1,415	-1,412	-1,169	-483	-452	-449	-223	-36	-4,479	-1,160	-212
Other income, net	'	'	'	'	'	'	'	'	3,634	7,155	7,168
Income taxes	-1,502	-494	-2,086	-3,243	-4,922	-2,861	-6,721	-4,262	-7,325	-18,766	-17,760
Earnings (loss) from discontinued operation	'	'	131	2	-4,226	-166	-608	-1,789	133	-6,789	-9,443
Net earnings	'	'	'	'	10,238	16,094	12,467	13,132	38,449	51,931	61,275
Depreciation and amortization	'	'	'	'	'	'	'	'	53,098	40,792	34,523
Segment assets	1,071,926	'	'	'	863,802	'	'	'	1,071,926	863,802	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	29,220	25,205	42,797
Total carrying value of equity method investment	11,589	'	'	'	11,203	'	'	'	11,589	11,203	'
Goodwill	196,145	'	'	'	123,352	'	'	'	196,145	123,352	80,748
Eliminations	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Inter-segment revenues	'	'	'	'	'	'	'	'	-17,479	-13,678	-17,193
Infrared Optics \| Operating Segments	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	209,658	203,319	201,611
Inter-segment revenues	'	'	'	'	'	'	'	'	1,608	2,618	3,174
Segment earnings (loss)	'	'	'	'	'	'	'	'	40,736	49,457	51,095
Depreciation and amortization	'	'	'	'	'	'	'	'	9,174	8,423	8,480
Segment assets	231,874	'	'	'	238,700	'	'	'	231,874	238,700	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	9,719	5,812	8,072
Goodwill	9,754	'	'	'	9,677	'	'	'	9,754	9,677	9,612
Near-Infrared Optics \| Operating Segments	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	144,677	154,852	140,001
Inter-segment revenues	'	'	'	'	'	'	'	'	2,406	896	2,135
Segment earnings (loss)	'	'	'	'	'	'	'	'	9,814	19,628	14,060
Depreciation and amortization	'	'	'	'	'	'	'	'	16,764	17,286	15,803
Segment assets	295,953	'	'	'	307,431	'	'	'	295,953	307,431	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	8,171	9,170	12,249
Goodwill	60,408	'	'	'	60,269	'	'	'	60,408	60,269	48,496
Military & Materials \| Operating Segments	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	98,324	97,116	100,235
Inter-segment revenues	'	'	'	'	'	'	'	'	6,514	4,853	7,589
Segment earnings (loss)	'	'	'	'	'	'	'	'	12,851	656	7,925
Depreciation and amortization	'	'	'	'	'	'	'	'	8,111	7,023	5,957
Segment assets	117,730	'	'	'	139,923	'	'	'	117,730	139,923	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	5,539	3,909	11,983
Goodwill	30,712	'	'	'	30,712	'	'	'	30,712	30,712	12,326
Advanced Products Group \| Operating Segments	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	115,394	95,788	74,556
Inter-segment revenues	'	'	'	'	'	'	'	'	6,388	5,311	4,295
Segment earnings (loss)	'	'	'	'	'	'	'	'	9,419	1,750	8,442
Depreciation and amortization	'	'	'	'	'	'	'	'	9,947	8,060	4,283
Segment assets	175,986	'	'	'	177,748	'	'	'	175,986	177,748	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	3,525	6,314	10,493
Total carrying value of equity method investment	11,589	'	'	'	11,203	'	'	'	11,589	11,203	'
Goodwill	22,178	'	'	'	22,694	'	'	'	22,178	22,694	10,314
Active Optical Products \| Operating Segments	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	115,208	'	'
Inter-segment revenues	'	'	'	'	'	'	'	'	563	'	'
Segment earnings (loss)	'	'	'	'	'	'	'	'	-26,334	'	'
Depreciation and amortization	'	'	'	'	'	'	'	'	9,102	'	'
Segment assets	250,383	'	'	'	'	'	'	'	250,383	'	'
Expenditures for property, plant and equipment	'	'	'	'	'	'	'	'	2,266	'	'
Goodwill	$73,093	'	'	'	'	'	'	'	$73,093	'	'

Geographical_Information_of_Re

Geographical Information of Revenue (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	$187,921	$173,555	$171,765	$150,020	$154,030	$143,940	$125,107	$127,998	$683,261	$551,075	$516,403
UNITED STATES	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	263,493	251,735	204,706
CHINA	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	114,247	123,306	123,348
SWITZERLAND	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	70,260	10,268	11,714
GERMANY	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	69,983	59,628	51,962
HONG KONG	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	54,602	'	'
JAPAN	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	38,110	29,462	35,915
VIET NAM	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	23,141	29,425	31,500
PHILIPPINES	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	14,959	17,400	26,185
ITALY	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	8,897	7,593	7,214
SINGAPORE	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	8,273	6,280	7,238
UNITED KINGDOM	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	7,148	6,865	6,026
BELGIUM	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	6,578	5,821	6,010
AUSTRALIA	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	3,570	3,292	4,585
Total Non-United States	'	'	'	'	'	'	'	'	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	$419,768	$299,340	$311,697

Geographical_Information_of_Lo

Geographical Information of Long Lived Assets (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	$216,099	$176,120	$155,825
UNITED STATES	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	109,138	110,337	85,709
CHINA	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	45,667	43,139	45,412
SWITZERLAND	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	22,524	5	10
GERMANY	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	16,129	2,107	1,581
VIET NAM	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	9,107	10,081	10,278
PHILIPPINES	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	6,205	7,207	8,692
HONG KONG	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	5,111	'	'
Other Country	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	2,218	3,244	4,143
Total Non-United States	'	'	'
Revenues From External Customers And Long Lived Assets [Line Items]	'	'	'
Long-Lived Assets	$106,961	$65,783	$70,116

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'
Payment of earnout arrangement	$3
Business acquisition, additional cash earnout opportunities	4.2
Unrealized gain due to fair value re-measurement	$0.30

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 $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Liabilities:	'	'
Contingent Earnout Arrangement	'	$3,300
Foreign currency forward contracts	54	23
Fair Value, Inputs, Level 1	'	'
Liabilities:	'	'
Contingent Earnout Arrangement	'	'
Fair Value, Inputs, Level 2	'	'
Liabilities:	'	'
Contingent Earnout Arrangement	'	'
Foreign currency forward contracts	54	23
Fair Value, Inputs, Level 3	'	'
Liabilities:	'	'
Contingent Earnout Arrangement	'	$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) (USD $)	12 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014
		Fair Value, Measurements, Recurring	Fair Value, Measurements, Recurring	Fair Value, Inputs, Level 3
				Fair Value, Measurements, Recurring
Business Acquisition Contingent Consideration [Line Items]	'	'	'	'
Balance - beginning of period	'	'	$3,300	$3,300
Payment of earnout arrangement	3,000	'	'	-3,000
Changes in fair value	-300	'	'	-300
Balance - end of period	'	'	$3,300	'

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail)	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
In Millions, unless otherwise specified	USD ($)	JPY (¥)	USD ($)
Derivative [Line Items]	'	'	'
Foreign currency forward exchange contracts, notional amount	$7.40	¥ 250	$4.70

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Contributions to profit sharing retirement plan	$2,500,000	$2,200,000	$2,800,000
Common stock discount percentage from the prevailing market price	5.00%	'	'
Percentage of maximum employee subscription rate on base pay	10.00%	'	'
Contributions to the Compensation Plan by the employer	2,253,000	'	'
Contributions to the Compensation Plan by the employer in fiscal year 2015	2,100,000	'	'
Amount recognized as a component of net periodic benefit cost	'	300,000	'
Expected future benefit payments, 2015	1,300,000	'	'
Expected future benefit payments, 2016	1,100,000	'	'
Expected future benefit payments, 2017	1,600,000	'	'
Expected future benefit payments, 2018	700,000	'	'
Expected future benefit payments, 2019	3,100,000	'	'
Expected future benefit payments, Next five years thereafter	10,700,000	'	'
Pension liability	600,000	1,100,000	'
Percentage of discretionary incentive compensation	100.00%	'	'
Contributions to the Compensation Plan by the employees	1,900,000	1,800,000	1,400,000
P R M Defined Benefit Plan	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Contributions to the Compensation Plan by the employer	$0	$0	$0
Employee Stock	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Common stock authorized for issuance under the Plan	1,600,000	'	'
Common stock available for purchase under the plan	543,234	560,034	'

Schedule_of_Changes_in_Project

Schedule of Changes in Projected Benefit Obligations and Plan Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Change in projected benefit obligation:	'
Projected benefit obligation, date of acquisition	$38,748
Service cost	3,375
Interest cost	812
Plan amendments	-1,661
Participant contributions	1,110
Benefits (paid) received	-3,959
Actuarial (gain) loss on obligation	-867
Currency translation adjustment	1,832
Projected benefit obligation, end of period	39,390
Change in plan assets:	'
Plan assets at fair value, date of acquisition	30,167
Actual return on plan assets	776
Employer contributions	2,253
Participant contributions	1,110
Benefits (paid) received	-3,959
Currency translation adjustment	1,617
Plan assets at fair value, end of period	31,965
Other non-current assets:	'
Deferred tax asset	1,570
Other non-current liabilities:	'
Underfunded pension liability	7,425
Amounts recognized in accumulated other comprehensive income, net of tax:	'
Pension adjustment, net of taxes of $387	1,443
Accumulated benefit obligation, end of period	$35,581

Schedule_of_Net_Periodic_Pensi

Schedule of Net Periodic Pension Costs (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]	'
Service cost	$3,375
Interest cost	812
Expected return on plan assets	-1,338
Net amortization	'
Net period pension cost	$2,849

Schedule_of_Projected_and_Accu

Schedule of Projected and Accumulated Benefit Obligations Rates (Detail)	12 Months Ended
	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]	'
Discount rate	2.00%
Salary increase rate	2.00%
Expected return on plan assets	3.50%
Expected average remaining working life (in years)	'13 years 1 month 6 days

Schedule_of_Swiss_Plans_Asset_

Schedule of Swiss Plan's Asset Allocation (Detail)	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	100.00%
Fixed Income Investments	'
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	22.00%
Equity Investments	'
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	54.00%
Real Estate	'
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	14.00%
Cash	'
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	8.00%
Alternative Investments	'
Defined Benefit Plan Disclosure [Line Items]	'
Percentage of plan assets	2.00%

Components_of_Other_Accrued_Li

Components of Other Accrued Liabilities (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	$31,521	$34,695
Acquisition holdbacks	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	10,000	'
Redeemable noncontrolling interest liability	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	'	8,568
Earnout arrangement	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	'	3,300
Warranty reserves	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	2,859	1,661
Other accrued liabilities	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Other accrued liabilities	$18,662	$21,166

Other_Accrued_Liabilities_Addi

Other Accrued Liabilities - Additional Information (Detail) (Redeemable noncontrolling interest liability, USD $)	12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Redeemable noncontrolling interest liability	'	'
Schedule Of Accrued Liabilities [Line Items]	'	'
Minority interest, ownership percentage	'	25.07%
Minority interest, value	'	$7.60
Dividends declared and paid to the noncontrolling interest holder	$1	'

Changes_in_the_Carrying_Amount

Changes in the Carrying Amount of Redeemable Noncontrolling Interest (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Redeemable Noncontrolling Interest [Line Items]	'	'	'
Balance at Beginning of Year	'	$5,160	$1,828
Net earnings attributable to redeemable noncontrolling interest	'	1,118	969
Other changes	'	-585	-267
Redemption value adjustment to redeemable noncontrolling interest	'	2,875	2,630
Reclassification of redeemable noncontrolling interest to Other accrued liabilities	'	-8,568	'
Balance at End of Year	'	'	$5,160

Change_in_Carrying_Value_of_Co

Change in Carrying Value of Company's Warranty Reserve (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Guarantee Obligations [Line Items]	'
Balance-Beginning of Year	$1,661
Settlements during the period	-1,843
Additional warranty liability recorded	1,868
Warranty liability assumed through acquisitions	1,173
Balance-End of Year	$2,859

Schedule_of_Future_Commitments

Schedule of Future Commitments (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified	Jun. 30, 2014
Unrecorded Unconditional Purchase Obligation [Line Items]	'
2015	$15,906
2016	489
2017	488
2018	'
2019	'

Schedule_of_Future_Minimum_Lea

Schedule of Future Minimum Lease Payments Due Under Non-Cancelable Capital Lease (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified	Jun. 30, 2014
Capital Leased Assets [Line Items]	'
2015	$1,071
2016	1,071
2017	1,071
2018	1,071
2019	1,071
Thereafter	12,228
Total minimum lease payments	17,583
Less amount representing interest	5,947
Present value of capitalized payments	11,636
Less: current portion	453
Long-term portion	$11,183

Capital_Lease_Additional_Infor

Capital Lease - Additional Information (Detail) (USD $)	Jun. 30, 2014	Aug. 31, 2014	Jun. 30, 2014
		Forecast	Capital Lease
		HIGHYAG
Capital Leased Assets [Line Items]	'	'	'
Capitalized payments property plant and equipment	$11,636,000	'	'
Property, plant and equipment estimated useful lives, years	'	'	'17 years
Cash paid for purchase of business	'	$13,400,000	'

Share_Repurchase_Program_Detai

Share Repurchase Program (Detail) (USD $)	1 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended
	Feb. 28, 2014	31-May-12	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Aug. 31, 2014	Jun. 30, 2015
	Feb. 28, 2014	31-May-12	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Forecast	Forecast
Equity Class Of Treasury Stock [Line Items]	'	'	'	'	'	'	'
Stock repurchase program, authorized amount	$20,000,000	$25,000,000	'	'	'	$50,000,000	'
Treasury stock, shares	'	'	1,333,355	1,141,022	301,716	'	180,000
Purchase of Treasury Stock	'	'	$19,973,000	$19,978,000	$4,988,000	'	$2,500,000

Quarterly_Financial_Data_Detai

Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Quarterly Financial Data [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net revenues	$187,921	$173,555	$171,765	$150,020	$154,030	$143,940	$125,107	$127,998	$683,261	$551,075	$516,403
Cost of goods sold	125,600	118,865	118,371	93,709	99,134	92,986	77,839	77,599	456,545	347,558	315,056
Internal research and development	11,322	12,099	11,355	7,747	5,697	5,781	5,626	5,585	42,523	22,689	21,410
Selling, general and administrative	36,295	33,848	32,471	35,093	29,803	27,004	26,174	26,356	137,707	109,337	98,415
Interest expense	1,415	1,412	1,169	483	452	449	223	36	4,479	1,160	212
Other expense (income), net	-868	-1,694	-1,125	53	-442	-1,401	-4,551	-761	-3,634	-7,155	-7,168
Earnings Before Income Taxes	14,157	9,025	9,524	12,935	19,386	19,121	19,796	19,183	45,641	77,486	88,478
Income taxes	1,502	494	2,086	3,243	4,922	2,861	6,721	4,262	7,325	18,766	17,760
Earnings from continuing operations	12,655	8,531	7,438	9,692	14,464	16,260	13,075	14,921	38,316	58,720	70,718
Earnings (loss) from discontinued operation	'	'	131	2	-4,226	-166	-608	-1,789	133	-6,789	-9,443
Net earnings	'	'	'	'	10,238	16,094	12,467	13,132	38,449	51,931	61,275
Net Earnings Attributable to Noncontrolling Interest	'	'	'	'	212	225	267	414	'	'	'
Net Earnings Attributable to II-VI Incorporated	$12,655	$8,531	$7,569	$9,694	$10,026	$15,869	$12,200	$12,718	$38,449	$50,813	$60,306
Net Earnings Attributable to II-VI Incorporated: Basic earnings per share:	'	'	'	'	'	'	'	'	'	'	'
Continuing operations	$0.21	$0.14	$0.12	$0.16	$0.23	$0.26	$0.20	$0.23	$0.62	$0.92	$1.10
Discontinued operation	'	'	'	$0	($0.07)	$0	($0.01)	($0.03)	'	($0.11)	($0.15)
Consolidated	$0.21	$0.14	$0.12	$0.16	$0.16	$0.26	$0.19	$0.20	$0.62	$0.81	$0.96
Net Earnings Attributable to II-VI Incorporated: Diluted earnings per share:	'	'	'	'	'	'	'	'	'	'	'
Continuing operations	$0.20	$0.13	$0.12	$0.15	$0.22	$0.25	$0.20	$0.23	$0.60	$0.90	$1.08
Discontinued operation	'	'	'	$0	($0.07)	$0	($0.01)	($0.03)	'	($0.11)	($0.15)
Consolidated	$0.20	$0.13	$0.12	$0.15	$0.16	$0.25	$0.19	$0.20	$0.60	$0.80	$0.94

Valuation_and_Qualifying_Accou1

Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Allowance for doubtful accounts	'		'		'
Valuation And Qualifying Accounts Disclosure [Line Items]	'		'		'
Balance at Beginning of Year	$1,479		$1,536		$766
Additions Charged to Expense	993		-92		940
Additions Charged to Other Accounts	'		179	[1]	-18
Deduction from Reserves	-620	[2]	-144	[2]	-152	[2]
Balance at End of Year	1,852		1,479		1,536
Warranty reserves	'		'		'
Valuation And Qualifying Accounts Disclosure [Line Items]	'		'		'
Balance at Beginning of Year	1,661		1,247		1,187
Additions Charged to Expense	1,868		1,851		1,710
Additions Charged to Other Accounts	1,173	[3]	'		'
Deduction from Reserves	-1,843		-1,437		-1,650
Balance at End of Year	$2,859		$1,661		$1,247

[1]	Primarily relates to allowance for doubtful accounts from the acquisitions
[2]	Primarily relates to write-offs of accounts receivable
[3]	Relates to the warranty reserve acquired from the acquisitions