Coherent (COHR) 10-K 21 Aug 17 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Aug. 14, 2017	Dec. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	IIVI
Entity Registrant Name	II-VI INC
Entity Central Index Key	820,318
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		63,279,520
Entity Public Float			$ 1,763,329,797

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Current Assets
Cash and cash equivalents	$ 271,888	$ 218,445
Accounts receivable - less allowance for doubtful accounts of $1,314 at June 30, 2017 and $2,016 at June 30, 2016	193,379	164,817
Inventories	203,695	175,133
Prepaid and refundable income taxes	6,732	6,535
Prepaid and other current assets	26,602	18,033
Total Current Assets	702,296	582,963
Property, plant & equipment, net	367,728	242,857
Goodwill	250,342	233,755
Other intangible assets, net	133,957	124,590
Investment	11,727	11,354
Deferred income taxes	3,023	7,848
Other assets	8,224	8,614
Total Assets	1,477,297	1,211,981
Current Liabilities
Current portion of long-term debt	20,000	20,000
Accounts payable	65,540	53,796
Accrued compensation and benefits	58,178	59,012
Accrued income taxes payable	12,178	12,588
Other accrued liabilities	29,056	25,846
Total Current Liabilities	184,952	171,242
Long-term debt	322,022	215,307
Capital lease obligation	23,415
Deferred income taxes	15,345	11,103
Other liabilities	31,000	31,991
Total Liabilities	576,734	429,643
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 - 74,081,451 shares at June 30, 2017; 72,840,257 shares at June 30, 2016	269,638	243,812
Accumulated other comprehensive income (loss)	(13,778)	(14,017)
Retained earnings	748,062	652,788
Shareholders' equity excluding treasury stock	1,003,922	882,583
Treasury stock, at cost - 10,940,062 shares at June 30, 2017 and 10,965,925 shares at June 30, 2016	(103,359)	(100,245)
Total Shareholders' Equity	900,563	782,338
Total Liabilities and Shareholders' Equity	$ 1,477,297	$ 1,211,981

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,314	$ 2,016
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	74,081,451	72,840,257
Treasury stock, shares	10,940,062	10,965,925

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 972,046	$ 827,216	$ 741,961
Costs, Expenses and Other Expense (Income)
Cost of goods sold	583,693	514,403	470,363
Internal research and development	96,810	60,354	51,260
Selling, general and administrative	176,002	160,646	143,539
Interest expense	6,809	3,081	3,863
Other expense (income), net	(10,056)	(1,223)	(6,176)
Total Costs, Expenses and Other Expense (Income)	853,258	737,261	662,849
Earnings Before Income Taxes	118,788	89,955	79,112
Income Taxes	23,514	24,469	13,137
Net Earnings	$ 95,274	$ 65,486	$ 65,975
Basic Earnings Per Share	$ 1.52	$ 1.07	$ 1.08
Diluted Earnings Per Share	$ 1.48	$ 1.04	$ 1.05

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 95,274	$ 65,486	$ 65,975
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,275)	(15,651)	(8,497)
Pension adjustment, net of taxes of $674, ($1,886), and $($602) for the years ended June 30, 2017, 2016, and 2015, respectively	2,514	(7,031)	(2,244)
Other comprehensive income (loss)	239	(22,682)	(10,741)
Comprehensive income	$ 95,513	$ 42,804	$ 55,234

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Pension adjustment tax	$ 674	$ (1,886)	$ (602)

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning Balance at Jun. 30, 2014	$ 675,043	$ 213,573	$ 19,406	$ 521,327	$ (79,263)
Beginning Balance, shares at Jun. 30, 2014		70,935,000			(9,482,000)
Shares issued under share-based compensation plans	4,111	$ 5,196			$ (1,085)
Shares issued under share-based compensation plans (in shares)		773,000			(75,000)
Net earnings	65,975			65,975
Purchases of treasury stock	$ (12,729)				$ (12,729)
Purchases of treasury stock, shares	(936,049)				(936,000)
Treasury stock under deferred compensation arrangements		$ 418			$ (418)
Treasury stock under deferred compensation arrangements, (in shares)		72,000			(72,000)
Foreign currency translation adjustments	$ (8,497)		(8,497)
Share-based compensation expense	11,340	$ 11,340
Pension adjustment, net of taxes of $674 for the year ended June 30, 2017,($1,886) for the year ended June 30, 2016 and ($602) for the year ended June 30, 2015, respectively	(2,244)		(2,244)
APIC pool reclassification	(3,812)	(3,812)
Tax deficiency from share-based compensation expense	(106)	(106)
Ending Balance at Jun. 30, 2015	729,081	$ 226,609	8,665	587,302	$ (93,495)
Ending Balance, shares at Jun. 30, 2015		71,780,000			(10,565,000)
Shares issued under share-based compensation plans	7,649	$ 9,653			$ (2,004)
Shares issued under share-based compensation plans (in shares)		1,046,000			(112,000)
Net earnings	65,486			65,486
Purchases of treasury stock	$ (6,284)				$ (6,284)
Purchases of treasury stock, shares	(380,538)				(381,000)
Treasury stock under deferred compensation arrangements		$ (1,538)			$ 1,538
Treasury stock under deferred compensation arrangements, (in shares)		14,000			92,000
Foreign currency translation adjustments	$ (15,651)		(15,651)
Share-based compensation expense	9,675	$ 9,675
Pension adjustment, net of taxes of $674 for the year ended June 30, 2017,($1,886) for the year ended June 30, 2016 and ($602) for the year ended June 30, 2015, respectively	(7,031)		(7,031)
Tax deficiency from share-based compensation expense	(587)	(587)
Ending Balance at Jun. 30, 2016	782,338	$ 243,812	(14,017)	652,788	$ (100,245)
Ending Balance, shares at Jun. 30, 2016		72,840,000			(10,966,000)
Shares issued under share-based compensation plans	10,956	$ 15,092			$ (4,136)
Shares issued under share-based compensation plans (in shares)		1,204,000			(159,000)
Net earnings	$ 95,274			95,274
Purchases of treasury stock, shares	0
Treasury stock under deferred compensation arrangements		$ (1,022)			$ 1,022
Treasury stock under deferred compensation arrangements, (in shares)		37,000			185,000
Foreign currency translation adjustments	$ (2,275)		(2,275)
Share-based compensation expense	11,756	$ 11,756
Pension adjustment, net of taxes of $674 for the year ended June 30, 2017,($1,886) for the year ended June 30, 2016 and ($602) for the year ended June 30, 2015, respectively	2,514		2,514
Ending Balance at Jun. 30, 2017	$ 900,563	$ 269,638	$ (13,778)	$ 748,062	$ (103,359)
Ending Balance, shares at Jun. 30, 2017		74,081,000			(10,940,000)

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Statement Of Stockholders Equity [Abstract]
Pension adjustment tax	$ 674	$ (1,886)	$ (602)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities
Net earnings	$ 95,274	$ 65,486	$ 65,975
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	50,894	44,324	41,114
Amortization	12,743	12,339	11,969
Share-based compensation expense	11,756	9,675	11,340
Impairment of intangible assets			1,964
(Gains) losses on foreign currency remeasurements and transactions	(1,275)	(51)	2,178
Earnings from equity investment	(744)	(29)	(948)
Deferred income taxes	(1,184)	977	(3,781)
Excess tax benefits from share-based compensation expense		(589)	(335)
Increase (decrease) in cash from changes in (net of effects of acquisitions and dispositions):
Accounts receivable	(26,247)	(20,770)	(10,742)
Inventories	(24,992)	(8,650)	(4,207)
Accounts payable	6,704	5,715	61
Income taxes	735	13,416	7,589
Other operating net assets	(5,048)	1,127	7,189
Net cash provided by operating activities	118,616	122,970	129,366
Cash Flows from Investing Activities
Additions to property, plant & equipment	(138,517)	(58,170)	(52,313)
Proceeds from the sale of business		45,000
Purchases of businesses, net of cash acquired	(40,015)	(122,157)
Other investing activities	1,291	161	67
Net cash used in investing activities	(177,241)	(135,166)	(52,246)
Cash Flows from Financing Activities
Proceeds from borrowings	129,000	125,200	3,000
Payments on borrowings	(25,000)	(65,700)	(68,500)
Payment on earnout consideration	(2,000)
Proceeds from exercises of stock options	15,092	9,653	5,196
Payments in satisfaction of employees' minimum tax obligations	(4,136)	(2,004)	(1,089)
Debt issuance costs	(1,384)
Purchases of treasury stock		(6,284)	(12,729)
Payments on holdback arrangements			(2,350)
Other financing activities		587	408
Net cash provided by (used in) financing activities	111,572	61,452	(76,064)
Effect of exchange rate changes on cash and cash equivalents	496	(4,445)	(2,082)
Net increase (decrease) in cash and cash equivalents	53,443	44,811	(1,026)
Cash and Cash Equivalents at Beginning of Period	218,445	173,634	174,660
Cash and Cash Equivalents at End of Period	271,888	218,445	$ 173,634
Non cash transactions:
Purchases of business - earnout consideration recorded in Other liabilities		2,417
Purchases of business - earnout consideration recorded in Other accrued liabilities	2,250	$ 1,935
Capital lease obligation incurred on facility lease	25,000
Additions to property, plant & equipment included in accounts payable	$ 4,428

Nature of Business and Summary

Nature of Business and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
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 global leader in engineered materials and optoelectronic components and devices, is a vertically-integrated manufacturing company that develops, manufactures and markets engineered materials and optoelectronic componenets and devices for precision use in industrial materials processing, optical communications, military, consumer electronics, semiconductor equipment, life sciences and automotive 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. Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“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. Foreign Currency Translation. For II-VI Singapore Pte., Ltd. and its subsidiaries, II-VI Laser Enterprise of the II-VI Laser Solutions segment, II-VI Network Solutions Division of the II-VI Photonics segment, and II-VI Performance Metals of the II-VI Performance Products segment 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, the United Kingdom, South Korea and Taiwan. 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, 2017 and 2016. Factoring is done with high credit quality financial institutions in Japan. During the years ended June 30, 2017 and 2016, $23.1 million and $20.5 million, respectively, of accounts receivable had been factored. As of June 30, 2017 and 2016, 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 generally records an inventory reserve as a charge against earnings for all products on hand more than 12 to 24 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 may be 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 $18.5 million and $17.7 million at June 30, 2017 and 2016, 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 three to 20 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 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. The Company accounts for contingent consideration received in accordance with the “Loss Recovery Approach” under U.S. GAAP. Contingent consideration is accounted for as a gain contingency and not recognized in other expense (income), net until all contingencies have been satisfied. 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 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 five to 20 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 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, 2017 and June 30, 2016 was $11.7 million and $11.4 million, respectively. During the years ended June 30, 2017, 2016 and 2015, the Company’s pro-rata share of earnings from this investment was $0.7 million, $0.1 million and $0.9 million, respectively, and was recorded in other expense (income), net in the Consolidated Statements of Earnings. During the years ended June 30, 2017, 2016 and 2015, the Company received dividends from this equity investment of $0.4 million, $0.6 million and $0.6 million, 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 material loss contingency liabilities at June 30, 2017 related to commitments and contingencies. Accrued Bonus Compensation and Benefits. 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 with adjustments possible for changes in product lines or unusual conditions that come to the Company’s attention. 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 adopted an accounting policy to apply acquired deferred tax liabilities to pre-existing deferred tax assets before evaluating the need for a valuation allowance for acquired deferred tax assets. 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 based on historical experience and believe the collection of revenues, net of this reserve, is reasonably assured. Our reserve estimate has 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 for the periods covered herein, we did 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 1% 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 not significant for the fiscal years ended June 30, 2017, 2016 and 2015. 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 arrangements require the recognition of the grant-date 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. At least annually, 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 ($8.4) million and ($6.2) million as of June 30, 2017 and 2016, respectively, and pension adjustments of ($5.4) million and ($7.8) million as of June 30, 2017 and 2016, respectively. 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. Operating The Company classifies operating leases 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 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. Capital The Company accounts for capital leases at the lesser of the estimated fair market value of the leased property or the net present value of the aggregate future minimum lease payments. The current and long-term portion of the capital lease obligation is recorded in Other accrued liabilities and Capital lease obligations, respectively, in the Consolidated Balance Sheet. Capital lease assets are included in property, plant & equipment and are generally depreciated over the term of the lease. Interest expense on capital leases are included in interest expense in the Consolidated Statement of Earnings. Recently Issued Financial Accounting Standards Adopted Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. This ASU requires entities to present debt issuance costs in the balance sheet as a direct deduction from the carrying amount of the corresponding debt liability, consistent with debt discounts. The Company adopted ASU 2015-03, as clarified by ASU 2015-15, which did not have a material impact on the Company’s Consolidated Financial Statements other than corresponding reductions to total assets and total liabilities on the Condensed Consolidated Balance Sheets. Prior to adoption, the Company recorded deferred financing costs as Other assets. Upon adoption, the Company reclassified these costs as a reduction to long term debt and retrospectively reclassified $0.6 million that were previously presented as deferred financing costs, an asset on the Consolidated Balance Sheets as of June 30, 2016. There was no effect on the Consolidated Statements of Earnings as a result of the adoption. In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. This update requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. This update provides guidance about whether a cloud computing arrangement includes a software license. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. This update affects reporting organizations that are required to evaluate whether they should consolidate certain legal entities. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements-Going Concern. This update provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. The adoption of this ASU did not have a material effect on the Company’s Consolidated Financial Statements. Revenue Recognition Pronouncement Currently Under Evaluation In May 2014, the FASB issued ASU 2014-09: Revenue from Contracts with Customers (Topic 606) 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 allows for the use of either the retrospective or modified retrospective approach of adoption. On July 9, 2015, the FASB approved a one year deferral of the effective date of the update. The update will be effective for the Company’s 2019 fiscal year (July 1, 2018). In May 2016, the FASB issued an amendment which did not change the core principles of the guidance in Topic 606. Rather, the amendments in this update affect only narrow aspects of Topic 606. We commenced our evaluation of the impact of the ASU in fiscal 2017 by evaluating its impact on selected contracts at each of our business segments. As the ASU will supersede all existing revenue guidance affecting U.S. GAAP, it could impact revenue and cost recognition on our contracts across all our business segments, as well as our business processes and our information technology. As a result, our evaluation of the effect of the ASU will extend through fiscal year 2018. To date, the Company has completed its assessment of its military related contracts that comprise approximately 10% of consolidated revenues and have tentatively concluded that the Company will accelerate the recognition of revenue under the ASU for these contracts as the customer obtains control of the goods or service promised in the contract. For the commercial portion of the Company’s business, we will complete our assessment in fiscal year 2018. Based upon our evaluation to date, we cannot currently estimate the impacts of adopting the ASU. We have periodically updated our Audit Committee on our progress made towards this adoption. The Company will adopt this ASU using the modified retrospective method whereby the cumulative effect of applying the ASU would be recognized at the beginning of the year of adoption. Other Pronouncements Currently Under Evaluation In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 provides clarification on when modification accounting should be used for changes to the terms or conditions of a share-based payment award. This ASU does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. The new guidance will be applied prospectively to awards modified on or after the adoption date. The guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. The standard will be effective for the Company’s 2018 fiscal year. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07, Consolidation (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This update affects employers’ presentation of defined benefit retirement plan costs. Early adoption is permitted. The standard will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Accounting for Goodwill Impairment. This standard removes the second step of the goodwill impairment test, where a determination of the fair value of individual assets and liabilities of a reporting unit were needed to measure the goodwill impairment. Under this updated standard, goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The Company will adopt this for any impairment test performed after July 1, 2017 as permitted under the standard. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the definition of a business. This update changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. Early adoption is permitted. The standard will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. This update requires that when intra-entity asset transfers occur, the entity must recognize tax effects in the period in which the transfer occurs. The standard will be effective for The Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The guidance clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. The guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flow. The update will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This update is intended to provide financial statement users with more decision-useful information about expected credit losses and other commitments to extend credit held by the reporting entity. The standard replaces the incurred loss impairment methodology in current GAAP with one that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The update will be effective for the Company’s 2021 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This update simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, and classification in the statement of cash flows. The standard will be effective for the Company’s 2018 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07, Investments – Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. This update eliminates the requirement to retrospectively apply the equity method in previous periods when an investor obtains significant influence over an investee. The standard will be effective for the Company’s 2018 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): This update requires that a lessee recognize leased assets with terms greater than 12 months on the balance sheet for the rights and obligations created by those leases. The standard will be effective for the Company’s 2020 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Recognition and measurement of Financial Assets and Financial Liabilities (Topic 825): This update requires that public entities measure equity investments with readily determinable fair values, at fair value, with changes in their fair value recorded through net income. This ASU also clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity’s other deferred tax assets. Early adoption is permitted. The standard will be effective for the Company’s 2018 fiscal year. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. This update simplifies the measurement of inventory valuation at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The new inventory measurement requirements will be effective for the Company’s 2018 fiscal year and will replace the current inventory valuation guidance that requires the use of a lower of cost or market framework. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements.

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions	Note 2. Acquisitions Acquisition of Integrated Photonics, Inc. In June 2017, the Company acquired all the outstanding shares of Integrated Photonics, Inc. (“IPI”) a privately held company based in New Jersey. IPI is a leader in engineered magneto-optic materials that enable high-performance directional components such as optical isolators for the optical communications market. Under the terms of the merger agreement, the consideration consisted of initial cash paid at the acquisition date of $39.4 million, net of cash acquired and a working capital adjustment of $0.7 million. In addition, the agreement provides up to a maximum of $2.5 million of additional cash earnout opportunities based upon IPI achieving certain agreed upon financial and transitional objectives, which if earned would be payable in the amount of $2.5 million for the achievement of the annual target. The following table presents the preliminary purchase price at the date of acquisition ($000): Net cash paid at acquisition $ 39,436 Fair value of cash earnout arrangement 2,250 Purchase price $ 41,686 The following table presents the preliminary allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition, as the Company intends to finalize its accounting for the valuation of property, plant and equipment, identifiable intangibles and deferred income tax liabilities and anticipates completion of the valuation within one year from the date of the acquisition ($000): Assets Accounts receivable $ 2,083 Inventories 3,968 Prepaid and other assets 322 Property, plant & equipment 11,257 Intangible assets 22,213 Goodwill 17,107 Total assets acquired $ 56,950 Liabilities Accounts payable $ 846 Other accrued liabilities 1,032 Long-term debt assumed 3,834 Deferred tax liabilities 9,552 Total liabilities assumed 15,264 Net assets acquired $ 41,686 The goodwill of $17.1 million is included in the II-VI Photonics segment and is attributed to the expected synergies and the assembled workforce of IPI. None of the goodwill is deductible for income tax purposes. The fair value of accounts receivable acquired was $2.1 million with the gross contractual amount being $2.1 million. At the time of acquisition, the Company expected to collect all of the accounts receivable. The Company expensed transaction costs of $0.3 million for the year ended June 30, 2017. The amount of revenues and net earnings of IPI included in the Company’s Consolidated Statement of Earnings since the acquisition was immaterial. Pro forma information was omitted due to the immaterial impact of IPI financial results. Acquisition of DirectPhotonics Industries GmbH During the quarter ended December 31, 2016, the Company purchased certain assets, mainly inventory and fixed assets, of DirectPhotonics Industries GmbH located in Berlin, Germany for approximately $0.6 million. This business was combined with the Company’s II-VI HIGHYAG division in the II-VI Laser Solutions segment. Due to the insignificant amount of the acquisition purchase price, certain business combinations disclosures typically required under U.S. GAAP have been omitted. Acquisition of EpiWorks, Inc. In February 2016, the Company acquired all the outstanding shares of EpiWorks, Inc. (“EpiWorks”) a privately held company based in Illinois. Under the terms of the merger agreement, the consideration consisted of initial cash paid at the acquisition date of $43.0 million, net of cash acquired and a working capital adjustment of $0.2 million. In addition, the agreement provided up to a maximum of $6.0 million of additional cash earnout opportunities based upon EpiWorks achieving certain agreed upon financial and operational targets for capacity, wafer output and gross margin, which if earned would be payable in the amount of $2.0 million for the achievement of each specific annual target over the next three years. EpiWorks develops and manufactures compound semiconductor epitaxial wafers for applications in optical components, wireless devices and high-speed communication systems. EpiWorks is a business unit of the Company’s II-VI Laser Solutions operating segment for financial reporting purposes. The following table presents the allocation of the purchase price at the date of acquisition ($000): Net cash paid at acquisition $ 42,981 Cash paid for working capital adjustment 163 Fair value of cash earnout arrangement 4,352 Purchase price $ 47,496 The following table presents the final allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition. ($000): Assets Accounts receivable $ 2,121 Inventories 2,435 Prepaid and other assets 68 Property, plant & equipment 9,043 Intangible assets 14,124 Goodwill 27,588 Total assets acquired $ 55,379 Liabilities Accounts payable $ 605 Other accrued liabilities 859 Deferred tax liabilities 6,419 Total liabilities assumed 7,883 Net assets acquired $ 47,496 The goodwill of $27.6 million is included in the II-VI Laser Solutions segment and is attributed to the expected synergies and the assembled workforce of EpiWorks. None of the goodwill is deductible for income tax purposes. The fair value of accounts receivable acquired was $2.1 million with the gross contractual amount being $2.1 million. At the time of acquisition, the Company expected to collect all of the accounts receivable. The Company expensed transaction costs of $0.4 million for the year ended June 30, 2016. The purchase price allocation was finalized in the 2017 first quarter and did not result in any adjustments to the preliminary fair values. Acquisition of ANADIGICS, Inc. In March 2016, the Company acquired all the outstanding shares of ANADIGICS (Nasdaq:ANAD), which was a publicly traded company based in New Jersey. Under the terms of the merger agreement, the consideration consisted of both a working capital advance of $3.5 million and cash paid of $78.2 million at the acquisition date, net of cash acquired of $2.7 million. ANADIGICS has a 6-inch gallium arsenide wafer fabrication capability allowing for the production of high performance lasers and integrated circuits in high volume. In addition, at the time of the acquisition, ANADIGICS designed and manufactured innovative radio frequency (RF) solutions for CATV infrastructure, small-cell, WIFI and cellular markets. The Company divested this portion of the business in June 2016. In conjunction with the sale of the RF business, the Company renamed ANADIGICS as II-VI Optoelectronic Devices Division. OED is a business unit of the Company’s II-VI Laser Solutions operating segment for financial reporting purposes. The following table presents the final allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition. ($000): Assets Accounts receivable $ 3,973 Inventories 8,322 Prepaid and other assets 2,347 Property, plant & equipment 25,810 Intangible assets 1,060 Goodwill 48,312 Total assets acquired $ 89,824 Liabilities Accounts payable $ 3,586 Other accrued liabilities 7,226 Total liabilities assumed 10,812 Net assets acquired $ 79,012 The goodwill of $48.3 million is included in the II-VI Laser Solutions segment and is attributed to the expected synergies and the assembled workforce of ANADIGICS. None of the goodwill is deductible for income tax purposes. In conjunction with the June 3, 2016 sale of the RF business noted below, the Company disposed of $35.4 million of goodwill. The fair value of accounts receivable acquired was $4.0 million with the gross contractual amount being $4.0 million. At the time of acquisition, the Company expected to collect all of the accounts receivable. The Company expensed transaction costs of $2.9 million for the year ended June 30, 2016. The purchase price allocation was finalized in the 2017 first quarter and did not result in any adjustments to the preliminary fair values. Deferred Income Taxes In connection with the acquisitions of EpiWorks and ANADGICS, the Company adopted an accounting policy to apply acquired deferred tax liabilities to pre-existing deferred tax assets before evaluating the need for a valuation allowance for acquired deferred tax assets. During fiscal year 2016, the Company recorded a $36.2 million valuation allowance within purchase accounting as a result of the Company incurring a cumulative U.S. three year loss. Divesture of the RF Business of ANADIGICS On June 3, 2016, the Company sold the RF business of ANADIGICS that it acquired on March 15, 2016. The consideration consisted of $45.0 million of cash received at closing, a working capital adjustment of $0.6 million to be received within 60 days after closing and $5.0 million contingent consideration to be earned based upon supplying minimum volumes of wafers to the purchaser over an 18-month period through December 2017. The $5.0 million contingent consideration will be recognized in net earnings when earned and received from the purchaser. The Company believes the sale of this non-strategic business will allow the Company to focus its financial resources and devote greater attention to the 6-inch wafer fab business. The Company incurred approximately $0.4 million in transaction expenses and recorded an immaterial gain of less than $0.1 million on the sale of the RF business. The following table presents the carrying value of the assets and liabilities included as part of the disposal of the RF business of ANADIGICS ($000): Assets Inventories $ 5,378 Equipment 5,813 Goodwill 35,352 $ 46,543 Liabilities Accounts payable $ 963 Total Consideration $ 45,580 In conjunction with the sale of the RF business, the Company recorded approximately $7.5 million of severance expense for employees of the business. The amount of revenue and net loss from the RF business of ANADIGICS from the acquisition date to the date of sale included in the Company’s Consolidated Statements of Earnings were $10.1 million and $8.4 million, respectively, for the year ended June 30, 2016.

Inventories

Inventories	12 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Inventories	Note 3. Inventories The components of inventories, net of reserves, were as follows: June 30, 2017 2016 ($000) Raw materials $ 78,979 $ 70,623 Work in progress 61,679 57,566 Finished goods 63,037 46,944 $ 203,695 $ 175,133

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Jun. 30, 2017
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	Note 4. Property, Plant and Equipment Property, plant and equipment consist of the following: June 30, 2017 2016 ($000) Land and land improvements $ 5,667 $ 4,990 Buildings and improvements 144,293 110,219 Machinery and equipment 492,042 409,551 Construction in progress 88,458 34,602 730,460 559,362 Less accumulated depreciation (362,732 ) (316,505 ) $ 367,728 $ 242,857 During the quarter ended March 31, 2017, the Company sold its manufacturing facility located in Newport Ritchey, Florida. The Company received $1.7 million, net of customary closing costs and a $0.3 million reserve held in escrow for environmental purposes. The gain on sale of $0.3 million was recorded in other expense (income), net in the Consolidated Statement of Earnings. Depreciation expense was $50.9 million, $44.3 million and $41.1 million for the fiscal years ended June 30, 2017, 2016 and 2015, respectively. Included in the cost and accumulated depreciation of property, plant and equipment is the effect of foreign currency translation on the portion relating to the Company’s foreign subsidiaries.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Jun. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 5. 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. Changes in the carrying amount of goodwill were as follows ($000): Year Ended June 30, 2017 II-VI Laser II-VI II- VI Performance Solutions Photonics Products Total Balance-beginning of period $ 84,105 $ 96,760 $ 52,890 $ 233,755 Goodwill acquired - 17,107 - 17,107 Foreign currency translation 75 (595 ) - (520 ) Balance-end of period $ 84,180 $ 113,272 $ 52,890 $ 250,342 Year Ended June 30, 2016 II-VI Laser II-VI II- VI Performance Solutions Photonics Products Total Balance-beginning of period $ 43,578 $ 99,426 $ 52,890 $ 195,894 Goodwill acquired 75,900 - - 75,900 Goodwill attributed to the RF business sold (35,352 ) - - (35,352 ) Foreign currency translation (21 ) (2,666 ) - (2,687 ) Balance-end of period $ 84,105 $ 96,760 $ 52,890 $ 233,755 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 primarily used a discounted cash flow (DCF) model and a market analysis to determine the current fair value of its reporting units. A number of significant assumptions and estimates are involved in estimating the forecasted cash flows used in the DCF model, including markets and market shares, sales volume and pricing, costs to produce, working capital changes and income tax rates. Management considers historical experience and all available information at the time the fair values of the reporting units are estimated. 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. As of April 1 of fiscal years 2017 and 2016, the Company completed its annual impairment tests of its reporting units. Based on the results of these analyses, the Company’s goodwill was not impaired. The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of June 30, 2017 and 2016 were as follows ($000): June 30, 2017 June 30, 2016 Gross Net Gross Net Carrying Accumulated Book Carrying Accumulated Book Amount Amortization Value Amount Amortization Value Technology and Patents $ 65,438 $ (27,313 ) $ 38,125 $ 54,344 $ (22,724 ) $ 31,620 Trade Names 15,806 (1,340 ) 14,466 15,869 (1,209 ) 14,660 Customer Lists 123,058 (41,740 ) 81,318 112,141 (33,912 ) 78,229 Other 1,571 (1,523 ) 48 1,571 (1,490 ) 81 Total $ 205,873 $ (71,916 ) $ 133,957 $ 183,925 $ (59,335 ) $ 124,590 Amortization expense recorded on the intangible assets for the fiscal years ended June 30, 2017, 2016 and 2015 was $12.7 million, $12.3 million, and $12.0 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 100 months. The customer lists are being amortized over 60 to 240 months with a weighted-average remaining life of approximately 149 months. In conjunction with the acquisitions of IPI, the Company recorded $11.3 million of technology and patents and $10.9 million of customer lists. The intangibles were recorded based on the Company’s preliminary purchase price allocation which is expected to be finalized within one year from the date of the acquisition. In connection with past acquisitions, the Company acquired trade names with indefinite lives. The carrying amount of these trade names of $14.0 million as of June 30, 2017 is not amortized but tested annually for impairment. The Company completed its impairment test of these trade names with indefinite lives in the fourth quarter of fiscal years 2017 and 2016. Based on the results of these tests, the trade names were not impaired in fiscal years 2017 and 2016. During the year ended June 30, 2015, the Company recognized an impairment charge on two of its indefinite lived trade names in the II-VI Photonics reporting unit as these trade names were abandoned as a result of the Company’s rebranding efforts. Total impairment recorded during the year ended June 30, 2015 was $2.0 million, which represented the entire carrying value of these two trade names and was recorded in other expense (income), net in the Consolidated Statements of Earnings. Included in the gross carrying amount and accumulated amortization of the Company’s technology and patents, customer list and other component of intangible assets and goodwill is the effect of the foreign currency translation on the portion relating to the Company’s German and China subsidiaries. The estimated amortization expense for existing intangible assets for each of the five succeeding years is as follows ($000): Year Ending June 30, 2018 $ 13,800 2019 13,500 2020 12,500 2021 11,800 2022 10,300

Debt

Debt	12 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	Note 6. Debt The components of debt were as follows ($000): June 30, 2017 2016 Line of credit, interest at LIBOR, as defined, plus 1.5% $ 252,000 $ 188,000 Term loan, interest at LIBOR, as defined, plus 1.5% 85,000 45,000 Yen denominated line of credit, interest at LIBOR, as defined, plus 0.625% 2,679 2,917 Note payable assumed in IPI acquisition 3,834 - Total debt 343,513 235,917 Current portion of long-term debt (20,000 ) (20,000 ) Unamortized debt issuance costs (1,491 ) (610 ) Long-term debt, less current portion $ 322,022 $ 215,307 On July 28, 2016, the Company amended and restated its existing credit agreement. The Third Amended and Restated Credit Agreement (the “Amended Credit Facility”) provides for a revolving credit facility of $325 million, as well as a $100 million term loan. The term loan is being repaid in consecutive quarterly principal payments on the first business day of each January, April, July and October, with the first payment having commenced on October 1, 2016, 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 of July 2021. Amounts borrowed under the revolving credit facility are 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 revolving credit facility in an aggregate additional amount not to exceed $100 million. The Amended Credit Facility has a five-year term through July 28, 2021 and has an interest rate of either a Base Rate Option or a Euro-Rate Option, plus an Applicable Margin, as defined in the agreement governing the Amended Credit Facility. If the Base Rate option is selected for a borrowing, the Applicable Margin is 0.00% to 1.25% and if the Euro-Rate Option is selected for a borrowing, the Applicable Margin is 1.00% to 2.25%. The Applicable Margin is based on the Company’s ratio of consolidated indebtedness to consolidated EBITDA. Additionally, the Amended Credit Facility is subject to certain covenants, including those relating to minimum interest coverage and maximum leverage ratios. As of June 30, 2017, the Company was in compliance with all financial covenants under its Amended Credit Facility. The Company’s Yen denominated line of credit is a 500 million Yen ($4.9 million) facility. The Yen line of credit matures August 2020. The interest rate equal to the Euro-Rate, as defined in the loan agreement, plus 1.00% to 2.25%. At June 30, 2017, the Company had 300 million yen outstanding under the line of credit. Additionally, the facility is subject to certain covenants, including those relating to minimum interest coverage and maximum leverage ratios. As of June 30, 2017, the Company had $2.7 million outstanding and was in compliance with all financial covenants under its Yen facility. The Company had aggregate availability of $73.5 million and $37.7 million under its lines of credit as of June 30, 2017 and 2016, respectively. The amounts available under the Company’s lines of credit are reduced by outstanding letters of credit. As of June 30, 2017 and 2016, total outstanding letters of credit supported by the credit facilities were $1.3 million and $1.2 million, respectively. The weighted-average interest rate of total borrowings for each of the years ended June 30, 2017 and 2016 was 2.2% and 1.6%, respectively. The weighted-average of total borrowings for the fiscal years ended June 30, 2017 and 2016 was $272.1 million and $193.7 million, respectively. The Company has a line of credit facility with a Singapore bank which permits maximum borrowings in the local currency of approximately $0.6 million for the fiscal years ended June 30, 2017 and 2016, respectively. 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, 2017 and June 30, 2016. At June 30, 2017 and 2016, there were no outstanding borrowings under this facility. The Company had $0.3 million and $0.2 million of letters of credit supported by the Singapore line of credit facility as of June 30, 2017 and 2016, respectively. In conjunction with the acquisition of IPI, the Company assumed a non-interest bearing note payable owed to a major customer of IPI. The agreement if not terminated early by either party is payable in full in May 2019. 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, 2017, 2016 and 2015 were $6.1 million, $3.1 million and $4.0 million, respectively. Remaining annual principal payments under the Company’s existing credit facilities and note payable as of June 30, 2017 were as follows ($000): U.S. Dollar Term Yen Line Line of Note Period Loan of Credit Credit Payable Total Year 1 $ 20,000 $ - $ - $ - $ 20,000 Year 2 20,000 - - 3,834 $ 23,834 Year 3 20,000 - $ 20,000 Year 4 20,000 2,679 - - $ 22,679 Year 5 5,000 - 252,000 - $ 257,000 Thereafter - - - - $ - Total $ 85,000 $ 2,679 $ 252,000 $ 3,834 $ 343,513

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note 7. Income Taxes The components of earnings (losses) before income taxes were as follows: Year Ended June 30, 2017 2016 2015 ($000) U.S. loss $ (6,944 ) $ (5,809 ) $ (5,326 ) Non-U.S. income 125,732 95,764 84,438 Earnings before income taxes $ 118,788 $ 89,955 $ 79,112 The components of income tax expense were as follows: Year Ended June 30, 2017 2016 2015 ($000) Current: Federal $ 2,133 $ 3,704 $ (146 ) State 253 5 86 Foreign 22,312 19,783 16,978 Total Current $ 24,698 $ 23,492 $ 16,918 Deferred: Federal $ (6,963 ) $ 2,759 $ (2,762 ) State (1,251 ) 1,302 (251 ) Foreign 7,030 (3,084 ) (768 ) Total Deferred $ (1,184 ) $ 977 $ (3,781 ) Total Income Tax Expense $ 23,514 $ 24,469 $ 13,137 Principal items comprising deferred income taxes were as follows: June 30, 2017 2016 ($000) Deferred income tax assets Inventory capitalization $ 6,338 $ 6,814 Non-deductible accruals 1,705 2,212 Accrued employee benefits 9,738 15,543 Net-operating loss and credit carryforwards 53,048 43,516 Share-based compensation expense 12,386 11,693 Other 1,761 1,770 Valuation allowances (42,562 ) (42,641 ) Total deferred income tax assets $ 42,414 $ 38,907 Deferred income tax liabilities Tax over book accumulated depreciation $ (7,803 ) $ (9,759 ) Intangible assets (38,108 ) (29,628 ) Tax on unremitted earnings (6,210 ) (797 ) Other (2,615 ) (1,978 ) Total deferred income tax liabilities $ (54,736 ) $ (42,162 ) Net deferred income taxes $ (12,322 ) $ (3,255 ) The reconciliation of income tax expense at the statutory federal rate to the reported income tax expense is as follows: Year Ended June 30, 2017 % 2016 % 2015 % ($000) Taxes at statutory rate $ 41,576 35 $ 31,484 35 $ 27,689 35 Increase (decrease) in taxes resulting from: State income taxes-net of federal benefit (641 ) - 864 1 (196 ) - Taxes on non U.S. earnings (12,907 ) (11 ) (13,860 ) (15 ) (11,687 ) (15 ) Valuation allowance (806 ) (1 ) 8,464 9 678 1 Research and manufacturing incentive deductions (3,346 ) (3 ) (3,074 ) (3 ) (2,573 ) (3 ) Other (362 ) - 591 - (774 ) (1 ) $ 23,514 20 $ 24,469 27 $ 13,137 17 During the fiscal years ended June 30, 2017, 2016, and 2015, net cash paid by the Company for income taxes was $23.6 million, $18.5 million, and $13.0 million, respectively. Our foreign subsidiaries in the Philippines operate under various tax holiday arrangements. The benefits of such arrangements phase out through the fiscal year ended June 30, 2019. The impact of the tax holidays on our effective rate is a reduction in the rate of 0.31%, 0.37% and 0.22% for the fiscal years ended June 30, 2017, 2016 and 2015, respectively, and the impact of the tax holidays on diluted earnings per share is immaterial. The cumulative amount of the Company’s foreign undistributed net earnings for which no deferred taxes have been provided was approximately $715 million at June 30, 2017. If the The Company has the following gross operating loss carryforwards and tax credit carryforwards as of June 30, 2017: Type Amount Expiration Date ($000) Tax credit carryforwards: Federal research and development credits $ 10,953 June 2019-June 2037 Foreign tax credits 4,539 June 2024-June 2027 State tax credits 4,820 June 2018-June 2037 Operating loss carryforwards: Loss carryforwards - federal $ 100,922 June 2020-June 2037 Loss carryforwards - state 71,536 June 2018-June 2037 Loss carryforwards - foreign 2,610 June 2018-June 2024 The Company has recorded a valuation allowance against the majority of the loss and 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 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, 2017, 2016 and 2015 were as follows: 2017 2016 2015 ($000) Balance at Beginning of Year $ 5,559 $ 4,022 $ 2,775 Increases in current year tax positions 895 2,146 2,450 Increases in prior year tax positions 2,605 190 203 Decreases in prior year tax positions - (67 ) - Settlements (1,143 ) - - Expiration of statute of limitations (339 ) (732 ) (1,406 ) Balance at End of Year $ 7,577 $ 5,559 $ 4,022 The Company classifies all estimated and actual interest and penalties as income tax expense. During fiscal year 2017, there was $0.5 million of interest and penalties within income tax expense. During the fiscal year 2016, there was no interest and penalties within income tax expense. During the fiscal year 2015, there was a benefit of $0.1 million of interest and penalties within tax expense. The Company had $0.3 million, $0.1 million, and $0.1 million of interest and penalties accrued at June 30, 2017, 2016, and 2015, 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 $1.3 million and $0.5 million at June 30, 2017 and 2016, respectively. The Company expects a decrease of $0.4 million of unrecognized tax benefits during the next 12 months due to the expiration of statutes of limitation. Fiscal years 2014 to 2017 remain open to examination by the Internal Revenue Service, fiscal years 2012 to 2017 remain open to examination by certain state jurisdictions, and fiscal years 2007 to 2017 remain open to examination by certain foreign taxing jurisdictions. The Company’s subsidiary in Germany has been notified of an examination to start in fiscal year 2018. The Company believes its income tax reserves for these tax matters are adequate.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Note 8. 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 140,000, 153,000 and 576,000 for the fiscal years ended June 30, 2017, 2016 and 2015, respectively, because they were anti-dilutive. Year Ended June 30, 2017 2016 2015 ($000 except per share) Net earnings $ 95,274 $ 65,486 $ 65,975 Divided by: Weighted average shares 62,576 61,366 61,219 Basic earnings per common share $ 1.52 $ 1.07 $ 1.08 Net earnings $ 95,274 $ 65,486 $ 65,975 Divided by: Weighted average shares 62,576 61,366 61,219 Dilutive effect of common stock equivalents 1,931 1,543 1,367 Diluted weighted average common shares 64,507 62,909 62,586 Diluted earnings per common share $ 1.48 $ 1.04 $ 1.05

Operating Leases

Operating Leases	12 Months Ended
	Jun. 30, 2017
Leases [Abstract]
Operating Leases	Note 9. Operating Leases The Company leases certain property under operating leases that expire at various dates. Future rental commitments applicable to the operating leases at June 30, 2017 are as follows: Year Ending June 30, ($000) 2018 $ 14,400 2019 12,400 2020 10,500 2021 6,800 2022 4,600 Thereafter 17,900 Rent expense was approximately $14.7 million, $14.2 million, and $15.0 million for the fiscal years ended June 30, 2017, 2016 and 2015, respectively.

Share-Based Compensation Plans

Share-Based Compensation Plans	12 Months Ended
	Jun. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shared-Based Compensation Plans	Note 10. Share-Based Compensation Plans The Company’s Board of Directors adopted the II-VI Incorporated Amended and Restated 2012 Omnibus Incentive Plan (the “Plan”) which was approved by the shareholders at the Annual Meeting in November 2014. 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 is limited to 4,900,000 shares of Common Stock, not including any remaining shares forfeited under the predecessor plans 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, 2017, there were approximately 1,644,000 shares available to be issued under the Plan, including forfeited shares from predecessor plans. The Company records share-based compensation expense for these awards which requires the recognition of the grant-date 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, 2017, 2016 and 2015 is as follows ($000): Year Ended June 30, 2017 2016 2015 Stock Options and Cash-Based Stock Appreciation Rights $ 5,611 $ 4,309 $ 5,158 Restricted Share Awards and Cash-Based Restricted Share Unit Awards 6,799 4,401 5,182 Performance Share Awards and Cash-Based Performance Share Unit Awards 3,626 2,196 2,649 $ 16,036 $ 10,906 $ 12,989 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 $4.3 million, $1.2 million, and $1.6 million, in fiscal years ended June 30, 2017, 2016, and 2015, respectively. 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, 2017, 2016 and 2015, the weighted-average fair value of options granted under the stock option plan was $8.88, $7.35 and $5.76, respectively, per option using the following assumptions: Year Ended June 30, 2017 2016 2015 Risk-free interest rate 1.43 % 1.68 % 1.71 % Expected volatility 37 % 38 % 41 % Expected life of options 6.28 years 6.43 years 5.94 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 18.71%. 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, 2017 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, 2016 4,251,926 $ 17.15 178,234 $ 17.13 Granted 771,900 $ 23.15 86,705 $ 22.51 Exercised (858,445 ) $ 17.58 (44,856 ) $ 17.42 Forfeited and Expired (84,466 ) $ 19.62 (5,616 ) $ 19.39 Outstanding - June 30, 2017 4,080,915 $ 18.15 214,467 $ 19.17 Exercisable - June 30, 2017 2,242,901 $ 16.97 34,334 $ 17.59 As of June 30, 2017, 2016 and 2015, the aggregate intrinsic value of stock options and cash-based stock appreciation rights outstanding and exercisable was $69.3 million, $10.1 million and $14.3 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, 2017, 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, 2017. 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, 2017, 2016, and 2015 was $12.3 million, $4.5 million, and $2.9 million, respectively. As of June 30, 2017, total unrecognized compensation cost related to non-vested stock options and cash-based stock appreciation rights was $12.0 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, 2017 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 $10.04 - $15.38 1,093,446 4.80 $ 13.18 717,394 3.59 $ 12.74 $15.41 - $23.45 2,852,141 6.61 $ 19.12 1,331,371 4.76 $ 18.13 $23.49 - $35.50 328,075 3.78 $ 25.53 228,470 1.29 $ 23.65 $39.65 - $39.65 21,720 9.62 39.65 - - $ - 4,295,382 5.95 $ 18.20 2,277,235 $ 4.04 $ 16.98 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 (for restricted share awards) or the stock price at the period end date (for cash-based restricted share unit awards), 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 13.0%. Restricted share and cash-based restricted share unit activity during the fiscal year ended June 30, 2017, 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, 2016 760,915 $ 17.49 105,935 $ 16.67 Granted 271,113 $ 23.23 67,790 $ 22.09 Vested (200,799 ) $ 17.22 (29,470 ) $ 17.22 Forfeited (19,396 ) $ 18.32 (3,328 ) $ 18.61 Nonvested - June 30, 2017 811,833 $ 19.45 140,927 $ 19.12 As of June 30, 2017, total unrecognized compensation cost related to non-vested restricted share and cash-based restricted share unit awards was $9.5 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, 2017, 2016 and 2015, was $7.8 million, $6.3 million and $5.9 million, respectively. The total fair value of restricted shares vested was $6.2 million, $5.5 million and $5.1 million during fiscal years 2017, 2016 and 2015, respectively. Performance Share Awards and Cash-Based Performance Share Unit Awards: The Compensation Committee of the Board of Directors of the Company has granted certain executive officers and employees performance share awards and performance share unit awards under the Plan. As of June 30, 2017, the Company had outstanding grants covering performance periods ranging from 12 to 36 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, 2017, 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, 2016 293,541 $ 16.12 98,659 $ 18.44 Granted 234,174 $ 21.67 10,808 $ 21.67 Vested (88,354 ) $ 15.56 (58,654 ) $ 18.52 Forfeited (61,651 ) $ 17.16 (33,661 ) $ 18.70 Nonvested - June 30, 2017 377,710 $ 19.52 17,152 $ 19.37 As of June 30, 2017, total unrecognized compensation cost related to non-vested performance share and cash-based performance share unit awards was $4.2 million. This cost is expected to be recognized over a weighted-average period of approximately one year. The total fair value of the performance share and cash-based performance share unit awards granted during the fiscal years ended June 30, 2017, 2016 and 2015 was $5.3 million, $2.4 million and $2.3 million, respectively. The total fair value of performance shares vested during the fiscal years ended June 30, 2017, 2016 and 2015 was $5.9 million, $1.5 million and $1.6 million, respectively. For our relative Total Shareholder Return, or TSR, performance-based awards, which are based on market performance of our stock as compared to the Russel 2000 Index, the compensation cost is recognized over the performance period on a straight-line basis net of forfeitures, because the awards vest only at the end of the measurement period and the probability of actual shares expected to be earned is considered in the grant date valuation. As a result, the expense is not adjusted to reflect the actual shares earned. We estimate the fair value of the TSR performance-based awards using the Monte-Carlo simulation model.

Segment and Geographic Reportin

Segment and Geographic Reporting	12 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Segment and Geographic Reporting	Note 11. Segment and Geographic Reporting The Company reports its business segments using the “management approach” model for segment reporting. This means that 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. The Company reports its financial results in the following three segments: (i) II-VI Laser Solutions, (ii) II-VI Photonics, and (iii) II-VI Performance Products, and the Company’s chief operating decision maker receives and reviews financial information based on these segments. The Company evaluates business segment performance based upon segment operating income, which is defined as earnings before income taxes, interest and other income or expense. The segments are managed separately due to the market, production requirements and facilities unique to each segment. The II-VI Laser Solutions segment is located in the United States, Singapore, China, Germany, Switzerland, Japan, Belgium, the United Kingdom, Italy, South Korea, the Philippines and Taiwan. II-VI Laser Solutions is directed by the President of II-VI Laser Solutions, while each geographic location is directed by a general manager, and is further divided into production and administrative units that are directed by managers. II-VI Laser Solutions designs, manufactures and markets optical and electro-optical components and materials sold under the II-VI Infrared brand name and used primarily in high-power CO 2 The II-VI Photonics segment is located in the United States, China, Vietnam, Germany, Japan, the United Kingdom., Italy and Hong Kong. II-VI Photonics is directed by the President of II-VI Photonics and is further divided into production and administrative units that are directed by managers. II-VI Photonics manufactures crystal materials, optics, microchip lasers and optoelectronic modules for use in optical communication networks and other diverse consumer and commercial applications. In addition, the segment also manufactures pump lasers, optical isolators, and optical amplifiers and micro-optics for optical amplifiers for both terrestrial and submarine applications within the optical communications market. The II-VI Performance Products segment is located in the United States, Vietnam, Japan, China, Germany and the Philippines. II-VI Performance Products is directed by the President of II-VI Performance Products, while each geographic location is directed by a general manager. II-VI Performance Products is further divided into production and administrative units that are directed by managers. II-VI Performance Products designs, manufactures and markets infrared optical components and high-precision optical assemblies for military, medical and commercial laser imaging applications. In addition, the segment designs, manufactures and markets unique engineered materials for thermoelectric and silicon carbide applications servicing the semiconductor, military and medical markets. On June 19, 2017, the Company completed its acquisition of IPI. See Note 2. Acquisitions. The operating results of this acquisition have been reflected in the selected financial information of the Company’s II-VI Photonics segment The accounting policies of the segments are the same as those of the Company. The Company’s corporate expenses are allocated to the segments. The Company evaluates segment performance based upon reported segment operating income, 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: II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2017 Revenues $ 339,341 $ 418,515 $ 214,190 $ - $ 972,046 Inter-segment revenues 33,792 14,236 10,189 (58,217 ) - Operating income 30,931 62,975 21,635 - 115,541 Interest expense - - - - (6,809 ) Other income, net - - - - 10,056 Income taxes - - - - (23,514 ) Net earnings - - - - 95,274 Depreciation and amortization 24,958 21,442 17,237 - 63,637 Expenditures for property, plant & equipment 82,760 27,397 32,788 - 142,945 Segment assets 589,239 578,315 309,743 - 1,477,297 Equity investment - - 11,727 - 11,727 Goodwill 84,180 113,272 52,890 - 250,342 II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2016 Revenues $ 303,002 $ 325,879 $ 198,335 $ - $ 827,216 Inter-segment revenues 24,290 12,081 7,274 (43,645 ) - Operating income 36,184 37,849 17,780 - 91,813 Interest expense - - - - (3,081 ) Other income, net - - - - 1,223 Income taxes - - - - (24,469 ) Net earnings - - - - 65,486 Depreciation and amortization 17,222 19,855 19,586 - 56,663 Expenditures for property, plant & equipment 25,620 21,096 11,454 - 58,170 Segment assets 469,754 467,486 274,741 - 1,211,981 Equity investment - - 11,354 - 11,354 Goodwill 84,105 96,760 52,890 - 233,755 II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2015 Revenues $ 287,881 $ 260,825 $ 193,255 $ - $ 741,961 Inter-segment revenues 21,021 13,210 9,325 (43,556 ) - Operating income 55,039 7,208 14,552 - 76,799 Interest expense - - - - (3,863 ) Other income, net - - - - 6,176 Income taxes - - - - (13,137 ) Net earnings - - - - 65,975 Depreciation and amortization 14,127 21,073 17,883 - 53,083 Expenditures for property, plant & equipment 27,349 11,324 13,640 - 52,313 Geographic information for revenues from the country of origin (shipped from), 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, were as follows: Revenues Year Ended June 30, 2017 2016 2015 ($000) United States $ 294,200 $ 266,347 $ 241,974 Non-United States China 208,595 172,292 140,586 Hong Kong 190,702 140,821 109,428 Germany 88,304 72,070 77,524 Japan 76,212 57,287 52,864 Switzerland 50,497 54,760 56,940 Vietnam 22,497 24,267 24,307 Italy 10,791 10,160 9,313 United Kingdom 8,473 8,154 7,749 Belgium 7,503 6,026 5,731 Korea 6,584 3,887 - Singapore 3,913 3,039 3,897 Philippines 3,057 8,106 11,334 Taiwan 718 - - Australia - - 314 Total Non-United States 677,846 560,869 499,987 $ 972,046 $ 827,216 $ 741,961 Long-Lived Assets June 30, 2017 2016 2015 ($000) United States $ 240,029 $ 137,521 $ 102,171 Non-United States China 62,024 51,824 46,794 Switzerland 36,795 38,202 26,384 Germany 15,323 15,162 15,790 Vietnam 8,272 8,895 7,985 Philippines 6,115 4,399 6,003 Hong Kong 1,914 1,765 2,476 Other 1,100 1,146 1,282 Total Non-United States 131,543 121,393 106,714 $ 371,572 $ 258,914 $ 208,885

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Fair Value of Financial Instruments	Note 12. 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, 2017, 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. In February 2016, the Company entered into a contingent earnout arrangement which provides up to a maximum of $6.0 million of additional cash earnout opportunities based upon EpiWorks achieving certain agreed upon financial and operational targets for capacity, wafer output and gross margin, which if earned would be payable for the achievement of each specific annual target over the next three years. The Company paid the first year earnout amount of $2.0 million during the quarter ended June 30, 2017. In June 2017, the Company entered into a contingent earnout arrangement which provides up to a maximum of $2.5 million of additional cash earnout opportunities based upon IPI achieving certain agreed upon financial and transitional objectives relating to finance, information technology and human resources, which if earned would be payable for the achievement of each specific annual target over the next year. The fair values of these contingent earnout arrangements were measured using valuations based upon other unobservable inputs that are significant to the fair value measurement (Level 3). The following tables provide a summary by level of the fair value of financial instruments that are measured on a recurring basis as of June 30, 2017 and 2016 ($000): Fair Value Measurements at June 30, 2017 Using: Quoted Prices in Significant Active Markets Other Significant for Identical Observable Unobservable Assets Inputs Inputs June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Foreign currency forward contracts $ 191 $ - $ 191 $ - Liabilities: Contingent earnout arrangements $ 5,795 $ - $ - $ 5,795 Fair Value Measurements at June 30, 2016 Using: Quoted Prices in Significant Active Markets Other Significant for Identical Observable Unobservable Assets Inputs Inputs June 30, 2016 (Level 1) (Level 2) (Level 3) Liabilities: Foreign currency forward contracts $ 511 $ - $ 511 $ - Contingent earnout arrangement $ 4,352 $ - $ - $ 4,352 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 2017 and 2016. 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 acquisitions of II-VI EpiWorks and IPI ($000): Significant Unobservable Inputs (Level 3) Balance at July 1, 2016 $ 4,352 Contingent earnout arrangements: Contingent earnout - IPI 2,250 Payments (2,000 ) Changes in fair value recorded in other expense, (income) 1,193 Balance at June 30, 2017 $ 5,795 The fair values of cash and cash equivalents 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 include variable interest rate, non-interest bearing debt and a capital lease obligation and are considered Level 2 among the fair value hierarchy and accordingly their carrying amounts approximate fair value.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Jun. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 13. 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 $12.7 million and $9.2 million at June 30, 2017 and 2016, respectively. As of June 30, 2017, these forward contracts had expiration dates ranging from July 2017 through October 2017, with Japanese Yen denominations individually between 300 million and 400 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 prepaid and other current assets in the Company’s Consolidated Balance Sheets as of June 30, 2017. The change in the fair value of these contracts for the fiscal year ended June 30, 2017, 2016 and 2015 was insignificant.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2017
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 14. 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 $4.3 million, $3.4 million, and $2.8 million for the years ended June 30, 2017, 2016 and 2015, 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 477,949 and 492,913 shares of Common Stock available for purchase under the plan at June 30, 2017 and 2016, respectively. Switzerland Defined Benefit Plan In conjunction with the acquisition of II-VI Laser Enterprise in fiscal year 2014, the Company assumed a pension plan covering employees of our Swiss subsidiary (the “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, 2017 were $2.4 million. Expected employer contributions in fiscal year 2018 are $2.6 million. The funded status of the Swiss Plan in the fiscal years ended June 30, 2017 and 2016 were as follows: Year Ended June 30, 2017 2016 Change in projected benefit obligation: Projected benefit obligation, beginning of period $ 54,094 $ 42,575 Service cost 3,689 2,680 Interest cost 163 434 Participant contributions 1,262 1,046 Benefits received 1,743 1,567 Actuarial (gain) loss on obligation (2,777 ) 8,071 Currency translation adjustment 1,344 (2,279 ) Projected benefit obligation, end of period $ 59,518 $ 54,094 Change in plan assets: Plan assets at fair value, beginning of period 35,857 32,509 Actual return on plan assets 805 431 Employer contributions 2,432 2,043 Participant contributions 1,262 1,046 Benefits received 1,743 1,567 Currency translation adjustment 891 (1,739 ) Plan assets at fair value, end of period $ 42,990 $ 35,857 Amounts recognized in consolidated balance sheets: Other non-current assets: Deferred tax asset $ 3,496 $ 3,857 Other non-current liabilities: Underfunded pension liability $ 16,528 18,237 Amounts recognized in accumulated other comprehensive income, net of tax: Pension adjustment $ 2,514 $ (7,031 ) Accumulated benefit obligation, end of period $ 56,457 $ 50,772 Net periodic pension cost associated with the Swiss Plan included the following components: Year Ended June 30, 2017 2016 Service cost $ 3,689 $ 2,680 Interest cost 163 434 Expected return on plan assets (742 ) (1,097 ) Prior service cost 594 (234 ) Net period pension cost $ 3,704 $ 1,783 The projected and accumulated benefit obligations for the Swiss Plan were calculated as of June 30, 2017 and 2016 using the following assumptions: Year Ended June 30, 2017 2016 Discount rate 0.8 % 0.3 % Salary increase rate 2.0 % 2.0 % Expected return on plan assets 2.0 % 2.0 % Expected average remaining working life (in years) 9.9 10.2 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. As is customary with Swiss pension plans, the assets of the plan are invested in a collective fund with multiple employers. We have no investment authority over the assets of the plan that are held and invested by a Swiss insurance company. The investment strategy of the Swiss Plan is managed by an independent asset manager with the objective of achieving a consistent long-term return which will provide sufficient funding for future pension obligations while limiting risk. The Swiss Plan is legally separate from II-VI, as are the assets of the plan. As of June 30, 2017, the Swiss Plan’s asset allocation was as follows: Year Ended June 30, 2017 2016 Fixed income investments 10.0 % 15.0 % Equity investments 52.0 % 51.0 % Real estate 26.0 % 28.0 % Cash 9.0 % 3.0 % Alternative investments 3.0 % 3.0 % 100.0 % 100.0 % Estimated future benefit payments under the Swiss Plan are estimated to be as follows: Year Ending June 30, ($000) 2018 $ 2,683 2019 4,062 2020 1,575 2021 2,533 2022 2,681 Next five years 19,163 Other Employee Benefit Plans 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, as it is currently implemented by the Company, eligible participants can elect to defer up to 100% of certain discretionary incentive compensation and certain equity 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 $0.8 million, $1.2 million, and $0.7 million for the fiscal years ended June 30, 2017, 2016, and 2015, respectively. During the fiscal year ended June 30, 2017, the Company made a contribution of $0.1 million to the Compensation Plan on behalf of Dr. Mattera for his appointment as Chief Executive Officer. There were no employer contributions made to the Compensation Plan for the fiscal years ended June 30, 2016 and 2015.

Other Accrued Liabilities

Other Accrued Liabilities	12 Months Ended
	Jun. 30, 2017
Payables And Accruals [Abstract]
Other Accrued Liabilities	Note 15. Other Accrued Liabilities The components of other accrued liabilities were as follows: Year Ended June 30, 2017 2016 ($000) Deferred revenue $ 2,345 $ 4,014 Warranty reserve 4,546 3,908 Current portion of earnout arrangements 3,930 1,935 Other accrued liabilities 18,235 15,989 $ 29,056 $ 25,846 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, 2017. Year Ended June 30, 2017 ($000) Balance-Beginning of Year $ 3,908 Settlements during the period (4,212 ) Additional warranty liability recorded 4,850 Balance-End of Year $ 4,546

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2017
Guarantees [Abstract]
Commitments and Contingencies	Note 16. 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 are 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, ($000) 2018 $ 21,988 2019 866 2020 578 2021 - 2022 -

Share Repurchase Programs

Share Repurchase Programs	12 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Share Repurchase Programs	Note 17. Share Repurchase Programs In August 2014, the Board of Directors authorized the Company to purchase up to $50 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 the fiscal year ended June 30, 2017, the Company did not repurchase shares of its Common Stock. During fiscal years ended June 30, 2016 and 2015, the Company purchased 380,538 and 936,049 shares of its Common Stock for $6.3 million and $12.7 million respectively, under this repurchase program.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Note 18. Accumulated Other Comprehensive Income (Loss) The changes in accumulated other comprehensive income (“AOCI”) by component, net of tax, for the years ended June 30, 2017, 2016, and 2015 were as follows ($000): Foreign Total Currency Defined Accumulated Other Translation Benefit Comprehensive Adjustment Pension Plan Income AOCI - June 30, 2014 $ 17,963 $ 1,443 $ 19,406 Other comprehensive income (loss) before reclassifications (8,497 ) (2,244 ) (10,741 ) Amounts reclassified from AOCI - - - Net current-period other comprehensive income (8,497 ) (2,244 ) (10,741 ) AOCI - June 30, 2015 9,466 (801 ) 8,665 Other comprehensive income (loss) before reclassifications (15,651 ) (6,805 ) (22,456 ) Amounts reclassified from AOCI - (226 ) (226 ) Net current-period other comprehensive income (15,651 ) (7,031 ) (22,682 ) AOCI - June 30, 2016 $ (6,185 ) $ (7,832 ) $ (14,017 ) Other comprehensive income (loss) before reclassifications (2,275 ) 1,920 (355 ) Amounts reclassified from AOCI - 594 594 Net current-period other comprehensive income (2,275 ) 2,514 239 AOCI - June 30, 2017 $ (8,460 ) $ (5,318 ) $ (13,778 )

Capital Lease

Capital Lease	12 Months Ended
	Jun. 30, 2017
Leases [Abstract]
Capital Lease	Note 19. Capital Lease During the quarter ended December 31, 2016, the Company’s OptoElectronic Devices subsidiary entered into a capital lease related to a building in Warren, New Jersey. The following table shows the future minimum lease payments due under the non-cancelable capital lease ($000): Fiscal Year Ending June 30, Amount 2018 $ 2,579 2019 2,579 2020 2,579 2021 2,579 2022 2,579 Thereafter 24,503 Total minimum lease payments $ 37,398 Less amount representing interest 12,909 Present value of capitalized payments $ 24,489 Less: current portion 1,074 Long-term portion $ 23,415 The current and long-term portion of the capital lease obligation was recorded in Other accrued liabilities and Capital lease obligation, respectively, in the Company’s Consolidated Balance Sheet as of June 30, 2017. The present value of the minimum capital lease payments at inception was $25.0 million recorded in Property, Plant & Equipment, net, in the Company’s Consolidated Balance Sheet as of June 30, 2017, with associated depreciation being recorded over the 15 year life of the lease. During the fiscal year ended June 30, 2017, the Company recorded $0.8 million of depreciation expense associated with the capital leased asset.

Subsequent Events

Subsequent Events	12 Months Ended
	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Note 20. Subsequent Events On July 26, 2017, the Company signed a definitive purchase agreement to acquire 100% of the outstanding stock of Kaim Laser Limited, a company located in the United Kingdom for $80 million. The Company will operate under the name II-VI Compound Semiconductor Ltd. and will be included in the II-VI Laser Solutions segment for financial reporting purposes. The preliminary purchase price allocation is incomplete at this time and will be accounted for in accordance with ASU 805 Business Combinations.

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Quarterly Financial Data (unaudited) Fiscal Year 2017 September 30, December 31, March 31, June 30, Quarter Ended 2016 2016 2017 2017 ($000) 2017 Net revenues $ 221,520 $ 231,822 $ 244,987 $ 273,717 Cost of goods sold 133,918 137,559 147,277 164,939 Internal research and development 21,832 23,632 25,380 25,966 Selling, general and administrative 42,079 43,495 43,291 47,137 Interest expense 1,246 1,365 1,936 2,262 Other expense (income) - net (1,402 ) (6,045 ) (2,164 ) (445 ) Earnings before income taxes 23,847 31,816 29,267 33,858 Income taxes 7,553 7,913 6,837 1,211 Net Earnings $ 16,294 $ 23,903 $ 22,430 $ 32,647 Basic earnings per share $ 0.26 $ 0.38 $ 0.36 $ 0.52 Diluted earnings per share $ 0.26 $ 0.37 $ 0.35 $ 0.50 Fiscal Year 2016 September 30, December 31, March 31, June 30, Quarter Ended 2015 2015 2016 2016 ($000) 2016 Net revenues $ 189,207 $ 191,434 $ 205,105 $ 241,470 Cost of goods sold 118,018 120,090 127,436 148,859 Internal research and development 13,151 12,155 14,946 20,102 Selling, general and administrative 36,310 37,408 43,333 43,595 Interest expense 649 597 769 1,066 Other expense (income) - net (1,057 ) (994 ) 1,257 (429 ) Earnings before income taxes 22,136 22,178 17,364 28,277 Income taxes 4,922 3,187 2,426 13,934 Net Earnings $ 17,214 $ 18,991 $ 14,938 $ 14,343 Basic earnings per share $ 0.28 $ 0.31 $ 0.24 $ 0.23 Diluted earnings per share $ 0.27 $ 0.30 $ 0.24 $ 0.23

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Jun. 30, 2017
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	SCHEDULE II II-VI INCORPORATED AND SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS YEARS ENDED JUNE 30, 2017, 2016, 2015 AND (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, 2017: Allowance for doubtful accounts $ 2,016 $ (134 ) $ - $ (568 ) (2) $ 1,314 Warranty reserves $ 3,908 $ 4,850 $ - $ (4,212 ) $ 4,546 Deferred tax asset valuation allowance $ 42,641 $ (79 ) $ - $ - $ 42,562 YEAR ENDED JUNE 30, 2016: Allowance for doubtful accounts $ 1,048 $ 1,123 $ - $ (155 ) (2) $ 2,016 Warranty reserves $ 3,251 $ 4,648 $ 82 (1) $ (4,073 ) $ 3,908 Deferred tax asset valuation allowance $ 2,713 $ 8,464 $ 36,240 (3) $ (4,776 ) (4) $ 42,641 YEAR ENDED JUNE 30, 2015: Allowance for doubtful accounts $ 1,852 $ (482 ) $ - $ (322 ) (2) $ 1,048 Warranty reserves $ 2,859 $ 5,047 $ - $ (4,655 ) $ 3,251 (1) Relates to the warranty reserve acquired from the acquisitions. (2) Primarily relates to write-offs of accounts receivable. (3) Valuation allowance recorded through goodwill. (4) Reduction in valuation allowance as a result of divesture of portion of business.

Nature of Business and Summar32

Nature of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation. The Consolidated Financial Statements include the accounts of the Company. All intercompany transactions and balances have been eliminated.
Estimates	Estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“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.
Foreign Currency Translation	Foreign Currency Translation. For II-VI Singapore Pte., Ltd. and its subsidiaries, II-VI Laser Enterprise of the II-VI Laser Solutions segment, II-VI Network Solutions Division of the II-VI Photonics segment, and II-VI Performance Metals of the II-VI Performance Products segment 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. 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, the United Kingdom, South Korea and Taiwan.
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, 2017 and 2016. Factoring is done with high credit quality financial institutions in Japan. During the years ended June 30, 2017 and 2016, $23.1 million and $20.5 million, respectively, of accounts receivable had been factored. As of June 30, 2017 and 2016, 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 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 generally records an inventory reserve as a charge against earnings for all products on hand more than 12 to 24 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 may be 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 $18.5 million and $17.7 million at June 30, 2017 and 2016, respectively.
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 three to 20 years for machinery and equipment.
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 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. The Company accounts for contingent consideration received in accordance with the “Loss Recovery Approach” under U.S. GAAP. Contingent consideration is accounted for as a gain contingency and not recognized in other expense (income), net until all contingencies have been satisfied.
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 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. 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 five to 20 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. The Company has an equity investment in Guangdong Fuxin Electronic Technology 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, 2017 and June 30, 2016 was $11.7 million and $11.4 million, respectively. During the years ended June 30, 2017, 2016 and 2015, the Company’s pro-rata share of earnings from this investment was $0.7 million, $0.1 million and $0.9 million, respectively, and was recorded in other expense (income), net in the Consolidated Statements of Earnings. During the years ended June 30, 2017, 2016 and 2015, the Company received dividends from this equity investment of $0.4 million, $0.6 million and $0.6 million, respectively.
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 material loss contingency liabilities at June 30, 2017 related to commitments and contingencies.
Accrued Bonus Compensation and Benefits	Accrued Bonus Compensation and Benefits. 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. 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 with adjustments possible for changes in product lines or unusual conditions that come to the Company’s attention.
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 adopted an accounting policy to apply acquired deferred tax liabilities to pre-existing deferred tax assets before evaluating the need for a valuation allowance for acquired deferred tax assets. 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 based on historical experience and believe the collection of revenues, net of this reserve, is reasonably assured. Our reserve estimate has 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 for the periods covered herein, we did 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 1% 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 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 not significant for the fiscal years ended June 30, 2017, 2016 and 2015.
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 arrangements require the recognition of the grant-date 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. 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. At least annually, 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 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 ($8.4) million and ($6.2) million as of June 30, 2017 and 2016, respectively, and pension adjustments of ($5.4) million and ($7.8) million as of June 30, 2017 and 2016, respectively.
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.
Operating Leases	Operating The Company classifies operating leases 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 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.
Capital Leases	Capital The Company accounts for capital leases at the lesser of the estimated fair market value of the leased property or the net present value of the aggregate future minimum lease payments. The current and long-term portion of the capital lease obligation is recorded in Other accrued liabilities and Capital lease obligations, respectively, in the Consolidated Balance Sheet. Capital lease assets are included in property, plant & equipment and are generally depreciated over the term of the lease. Interest expense on capital leases are included in interest expense in the Consolidated Statement of Earnings.
Recently Issued Financial Accounting Standards	Recently Issued Financial Accounting Standards Adopted Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, Interest – Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. This ASU requires entities to present debt issuance costs in the balance sheet as a direct deduction from the carrying amount of the corresponding debt liability, consistent with debt discounts. The Company adopted ASU 2015-03, as clarified by ASU 2015-15, which did not have a material impact on the Company’s Consolidated Financial Statements other than corresponding reductions to total assets and total liabilities on the Condensed Consolidated Balance Sheets. Prior to adoption, the Company recorded deferred financing costs as Other assets. Upon adoption, the Company reclassified these costs as a reduction to long term debt and retrospectively reclassified $0.6 million that were previously presented as deferred financing costs, an asset on the Consolidated Balance Sheets as of June 30, 2016. There was no effect on the Consolidated Statements of Earnings as a result of the adoption. In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. This update requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. This update provides guidance about whether a cloud computing arrangement includes a software license. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. This update affects reporting organizations that are required to evaluate whether they should consolidate certain legal entities. The adoption of this standard did not have a material effect on the Company’s Consolidated Financial Statements. In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements-Going Concern. This update provides U.S. GAAP guidance on management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and about related footnote disclosures. For each reporting period, management will be required to evaluate whether there are conditions or events that raise substantial doubt about a company’s ability to continue as a going concern within one year from the date the financial statements are issued. The adoption of this ASU did not have a material effect on the Company’s Consolidated Financial Statements. Revenue Recognition Pronouncement Currently Under Evaluation In May 2014, the FASB issued ASU 2014-09: Revenue from Contracts with Customers (Topic 606) 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 allows for the use of either the retrospective or modified retrospective approach of adoption. On July 9, 2015, the FASB approved a one year deferral of the effective date of the update. The update will be effective for the Company’s 2019 fiscal year (July 1, 2018). In May 2016, the FASB issued an amendment which did not change the core principles of the guidance in Topic 606. Rather, the amendments in this update affect only narrow aspects of Topic 606. We commenced our evaluation of the impact of the ASU in fiscal 2017 by evaluating its impact on selected contracts at each of our business segments. As the ASU will supersede all existing revenue guidance affecting U.S. GAAP, it could impact revenue and cost recognition on our contracts across all our business segments, as well as our business processes and our information technology. As a result, our evaluation of the effect of the ASU will extend through fiscal year 2018. To date, the Company has completed its assessment of its military related contracts that comprise approximately 10% of consolidated revenues and have tentatively concluded that the Company will accelerate the recognition of revenue under the ASU for these contracts as the customer obtains control of the goods or service promised in the contract. For the commercial portion of the Company’s business, we will complete our assessment in fiscal year 2018. Based upon our evaluation to date, we cannot currently estimate the impacts of adopting the ASU. We have periodically updated our Audit Committee on our progress made towards this adoption. The Company will adopt this ASU using the modified retrospective method whereby the cumulative effect of applying the ASU would be recognized at the beginning of the year of adoption. Other Pronouncements Currently Under Evaluation In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 provides clarification on when modification accounting should be used for changes to the terms or conditions of a share-based payment award. This ASU does not change the accounting for modifications but clarifies that modification accounting guidance should only be applied if there is a change to the value, vesting conditions, or award classification and would not be required if the changes are considered non-substantive. The new guidance will be applied prospectively to awards modified on or after the adoption date. The guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted. The standard will be effective for the Company’s 2018 fiscal year. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07, Consolidation (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This update affects employers’ presentation of defined benefit retirement plan costs. Early adoption is permitted. The standard will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Accounting for Goodwill Impairment. This standard removes the second step of the goodwill impairment test, where a determination of the fair value of individual assets and liabilities of a reporting unit were needed to measure the goodwill impairment. Under this updated standard, goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. The Company will adopt this for any impairment test performed after July 1, 2017 as permitted under the standard. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the definition of a business. This update changes the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. Early adoption is permitted. The standard will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. This update requires that when intra-entity asset transfers occur, the entity must recognize tax effects in the period in which the transfer occurs. The standard will be effective for The Company’s 2019 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The guidance clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. The guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flow. The update will be effective for the Company’s 2019 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This update is intended to provide financial statement users with more decision-useful information about expected credit losses and other commitments to extend credit held by the reporting entity. The standard replaces the incurred loss impairment methodology in current GAAP with one that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The update will be effective for the Company’s 2021 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This update simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, and classification in the statement of cash flows. The standard will be effective for the Company’s 2018 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In March 2016, the FASB issued ASU 2016-07, Investments – Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. This update eliminates the requirement to retrospectively apply the equity method in previous periods when an investor obtains significant influence over an investee. The standard will be effective for the Company’s 2018 fiscal year. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): This update requires that a lessee recognize leased assets with terms greater than 12 months on the balance sheet for the rights and obligations created by those leases. The standard will be effective for the Company’s 2020 fiscal year. Early adoption is permitted. The Company is evaluating the impact of this guidance on the Company’s Consolidated Financial Statements. In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Recognition and measurement of Financial Assets and Financial Liabilities (Topic 825): This update requires that public entities measure equity investments with readily determinable fair values, at fair value, with changes in their fair value recorded through net income. This ASU also clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity’s other deferred tax assets. Early adoption is permitted. The standard will be effective for the Company’s 2018 fiscal year. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. This update simplifies the measurement of inventory valuation at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The new inventory measurement requirements will be effective for the Company’s 2018 fiscal year and will replace the current inventory valuation guidance that requires the use of a lower of cost or market framework. The adoption of this ASU is not expected to have a material effect on the Company’s Consolidated Financial Statements.

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2017
Disposal Group, Disposed of by Sale, Not Discontinued Operations | RF Business of ANADIGICS
Carrying Value of the Assets and Liabilities Included as Part of Disposal	The following table presents the carrying value of the assets and liabilities included as part of the disposal of the RF business of ANADIGICS ($000): Assets Inventories $ 5,378 Equipment 5,813 Goodwill 35,352 $ 46,543 Liabilities Accounts payable $ 963 Total Consideration $ 45,580
Integrated Photonics, Inc
Purchase Price at the Date of Acquisition	The following table presents the preliminary purchase price at the date of acquisition ($000): Net cash paid at acquisition $ 39,436 Fair value of cash earnout arrangement 2,250 Purchase price $ 41,686
Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the preliminary allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition, as the Company intends to finalize its accounting for the valuation of property, plant and equipment, identifiable intangibles and deferred income tax liabilities and anticipates completion of the valuation within one year from the date of the acquisition ($000): Assets Accounts receivable $ 2,083 Inventories 3,968 Prepaid and other assets 322 Property, plant & equipment 11,257 Intangible assets 22,213 Goodwill 17,107 Total assets acquired $ 56,950 Liabilities Accounts payable $ 846 Other accrued liabilities 1,032 Long-term debt assumed 3,834 Deferred tax liabilities 9,552 Total liabilities assumed 15,264 Net assets acquired $ 41,686
EpiWorks
Purchase Price at the Date of Acquisition	The following table presents the allocation of the purchase price at the date of acquisition ($000): Net cash paid at acquisition $ 42,981 Cash paid for working capital adjustment 163 Fair value of cash earnout arrangement 4,352 Purchase price $ 47,496
Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the final allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition. ($000): Assets Accounts receivable $ 2,121 Inventories 2,435 Prepaid and other assets 68 Property, plant & equipment 9,043 Intangible assets 14,124 Goodwill 27,588 Total assets acquired $ 55,379 Liabilities Accounts payable $ 605 Other accrued liabilities 859 Deferred tax liabilities 6,419 Total liabilities assumed 7,883 Net assets acquired $ 47,496
ANADIGICS
Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	The following table presents the final allocation of the purchase price of the assets acquired and liabilities assumed at the date of acquisition. ($000): Assets Accounts receivable $ 3,973 Inventories 8,322 Prepaid and other assets 2,347 Property, plant & equipment 25,810 Intangible assets 1,060 Goodwill 48,312 Total assets acquired $ 89,824 Liabilities Accounts payable $ 3,586 Other accrued liabilities 7,226 Total liabilities assumed 10,812 Net assets acquired $ 79,012

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Jun. 30, 2017
Inventory Disclosure [Abstract]
Components of Inventories, Net of Reserves	The components of inventories, net of reserves, were as follows: June 30, 2017 2016 ($000) Raw materials $ 78,979 $ 70,623 Work in progress 61,679 57,566 Finished goods 63,037 46,944 $ 203,695 $ 175,133

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Jun. 30, 2017
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment consist of the following: June 30, 2017 2016 ($000) Land and land improvements $ 5,667 $ 4,990 Buildings and improvements 144,293 110,219 Machinery and equipment 492,042 409,551 Construction in progress 88,458 34,602 730,460 559,362 Less accumulated depreciation (362,732 ) (316,505 ) $ 367,728 $ 242,857

Goodwill and Other Intangible36

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Jun. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill were as follows ($000): Year Ended June 30, 2017 II-VI Laser II-VI II- VI Performance Solutions Photonics Products Total Balance-beginning of period $ 84,105 $ 96,760 $ 52,890 $ 233,755 Goodwill acquired - 17,107 - 17,107 Foreign currency translation 75 (595 ) - (520 ) Balance-end of period $ 84,180 $ 113,272 $ 52,890 $ 250,342 Year Ended June 30, 2016 II-VI Laser II-VI II- VI Performance Solutions Photonics Products Total Balance-beginning of period $ 43,578 $ 99,426 $ 52,890 $ 195,894 Goodwill acquired 75,900 - - 75,900 Goodwill attributed to the RF business sold (35,352 ) - - (35,352 ) Foreign currency translation (21 ) (2,666 ) - (2,687 ) Balance-end of period $ 84,105 $ 96,760 $ 52,890 $ 233,755
Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill	The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of June 30, 2017 and 2016 were as follows ($000): June 30, 2017 June 30, 2016 Gross Net Gross Net Carrying Accumulated Book Carrying Accumulated Book Amount Amortization Value Amount Amortization Value Technology and Patents $ 65,438 $ (27,313 ) $ 38,125 $ 54,344 $ (22,724 ) $ 31,620 Trade Names 15,806 (1,340 ) 14,466 15,869 (1,209 ) 14,660 Customer Lists 123,058 (41,740 ) 81,318 112,141 (33,912 ) 78,229 Other 1,571 (1,523 ) 48 1,571 (1,490 ) 81 Total $ 205,873 $ (71,916 ) $ 133,957 $ 183,925 $ (59,335 ) $ 124,590
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 ($000): Year Ending June 30, 2018 $ 13,800 2019 13,500 2020 12,500 2021 11,800 2022 10,300

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Components of Debt	The components of debt were as follows ($000): June 30, 2017 2016 Line of credit, interest at LIBOR, as defined, plus 1.5% $ 252,000 $ 188,000 Term loan, interest at LIBOR, as defined, plus 1.5% 85,000 45,000 Yen denominated line of credit, interest at LIBOR, as defined, plus 0.625% 2,679 2,917 Note payable assumed in IPI acquisition 3,834 - Total debt 343,513 235,917 Current portion of long-term debt (20,000 ) (20,000 ) Unamortized debt issuance costs (1,491 ) (610 ) Long-term debt, less current portion $ 322,022 $ 215,307
Remaining Annual Principal Payments of Credit Facilities and Note Payable	Remaining annual principal payments under the Company’s existing credit facilities and note payable as of June 30, 2017 were as follows ($000): U.S. Dollar Term Yen Line Line of Note Period Loan of Credit Credit Payable Total Year 1 $ 20,000 $ - $ - $ - $ 20,000 Year 2 20,000 - - 3,834 $ 23,834 Year 3 20,000 - $ 20,000 Year 4 20,000 2,679 - - $ 22,679 Year 5 5,000 - 252,000 - $ 257,000 Thereafter - - - - $ - Total $ 85,000 $ 2,679 $ 252,000 $ 3,834 $ 343,513

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Components of Earnings (Losses) Before Income Taxes	The components of earnings (losses) before income taxes were as follows: Year Ended June 30, 2017 2016 2015 ($000) U.S. loss $ (6,944 ) $ (5,809 ) $ (5,326 ) Non-U.S. income 125,732 95,764 84,438 Earnings before income taxes $ 118,788 $ 89,955 $ 79,112
Components of Income Tax Expense	The components of income tax expense were as follows: Year Ended June 30, 2017 2016 2015 ($000) Current: Federal $ 2,133 $ 3,704 $ (146 ) State 253 5 86 Foreign 22,312 19,783 16,978 Total Current $ 24,698 $ 23,492 $ 16,918 Deferred: Federal $ (6,963 ) $ 2,759 $ (2,762 ) State (1,251 ) 1,302 (251 ) Foreign 7,030 (3,084 ) (768 ) Total Deferred $ (1,184 ) $ 977 $ (3,781 ) Total Income Tax Expense $ 23,514 $ 24,469 $ 13,137
Schedule of Principal Items Comprising Deferred Income Taxes	Principal items comprising deferred income taxes were as follows: June 30, 2017 2016 ($000) Deferred income tax assets Inventory capitalization $ 6,338 $ 6,814 Non-deductible accruals 1,705 2,212 Accrued employee benefits 9,738 15,543 Net-operating loss and credit carryforwards 53,048 43,516 Share-based compensation expense 12,386 11,693 Other 1,761 1,770 Valuation allowances (42,562 ) (42,641 ) Total deferred income tax assets $ 42,414 $ 38,907 Deferred income tax liabilities Tax over book accumulated depreciation $ (7,803 ) $ (9,759 ) Intangible assets (38,108 ) (29,628 ) Tax on unremitted earnings (6,210 ) (797 ) Other (2,615 ) (1,978 ) Total deferred income tax liabilities $ (54,736 ) $ (42,162 ) Net deferred income taxes $ (12,322 ) $ (3,255 )
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, 2017 % 2016 % 2015 % ($000) Taxes at statutory rate $ 41,576 35 $ 31,484 35 $ 27,689 35 Increase (decrease) in taxes resulting from: State income taxes-net of federal benefit (641 ) - 864 1 (196 ) - Taxes on non U.S. earnings (12,907 ) (11 ) (13,860 ) (15 ) (11,687 ) (15 ) Valuation allowance (806 ) (1 ) 8,464 9 678 1 Research and manufacturing incentive deductions (3,346 ) (3 ) (3,074 ) (3 ) (2,573 ) (3 ) Other (362 ) - 591 - (774 ) (1 ) $ 23,514 20 $ 24,469 27 $ 13,137 17
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, 2017: Type Amount Expiration Date ($000) Tax credit carryforwards: Federal research and development credits $ 10,953 June 2019-June 2037 Foreign tax credits 4,539 June 2024-June 2027 State tax credits 4,820 June 2018-June 2037 Operating loss carryforwards: Loss carryforwards - federal $ 100,922 June 2020-June 2037 Loss carryforwards - state 71,536 June 2018-June 2037 Loss carryforwards - foreign 2,610 June 2018-June 2024
Schedule of Changes in Liability for Unrecognized Tax Benefits	Changes in the liability for unrecognized tax benefits for the fiscal years ended June 30, 2017, 2016 and 2015 were as follows: 2017 2016 2015 ($000) Balance at Beginning of Year $ 5,559 $ 4,022 $ 2,775 Increases in current year tax positions 895 2,146 2,450 Increases in prior year tax positions 2,605 190 203 Decreases in prior year tax positions - (67 ) - Settlements (1,143 ) - - Expiration of statute of limitations (339 ) (732 ) (1,406 ) Balance at End of Year $ 7,577 $ 5,559 $ 4,022

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
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 140,000, 153,000 and 576,000 for the fiscal years ended June 30, 2017, 2016 and 2015, respectively, because they were anti-dilutive. Year Ended June 30, 2017 2016 2015 ($000 except per share) Net earnings $ 95,274 $ 65,486 $ 65,975 Divided by: Weighted average shares 62,576 61,366 61,219 Basic earnings per common share $ 1.52 $ 1.07 $ 1.08 Net earnings $ 95,274 $ 65,486 $ 65,975 Divided by: Weighted average shares 62,576 61,366 61,219 Dilutive effect of common stock equivalents 1,931 1,543 1,367 Diluted weighted average common shares 64,507 62,909 62,586 Diluted earnings per common share $ 1.48 $ 1.04 $ 1.05

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Jun. 30, 2017
Leases [Abstract]
Operating Lease Future Rental Commitments	Future rental commitments applicable to the operating leases at June 30, 2017 are as follows: Year Ending June 30, ($000) 2018 $ 14,400 2019 12,400 2020 10,500 2021 6,800 2022 4,600 Thereafter 17,900

Share-Based Compensation Plans

Share-Based Compensation Plans (Tables)	12 Months Ended
	Jun. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation Expense by Award Type	Share-based compensation expense for the fiscal years ended June 30, 2017, 2016 and 2015 is as follows ($000): Year Ended June 30, 2017 2016 2015 Stock Options and Cash-Based Stock Appreciation Rights $ 5,611 $ 4,309 $ 5,158 Restricted Share Awards and Cash-Based Restricted Share Unit Awards 6,799 4,401 5,182 Performance Share Awards and Cash-Based Performance Share Unit Awards 3,626 2,196 2,649 $ 16,036 $ 10,906 $ 12,989
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, 2017, 2016 and 2015, the weighted-average fair value of options granted under the stock option plan was $8.88, $7.35 and $5.76, respectively, per option using the following assumptions: Year Ended June 30, 2017 2016 2015 Risk-free interest rate 1.43 % 1.68 % 1.71 % Expected volatility 37 % 38 % 41 % Expected life of options 6.28 years 6.43 years 5.94 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, 2017 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, 2016 4,251,926 $ 17.15 178,234 $ 17.13 Granted 771,900 $ 23.15 86,705 $ 22.51 Exercised (858,445 ) $ 17.58 (44,856 ) $ 17.42 Forfeited and Expired (84,466 ) $ 19.62 (5,616 ) $ 19.39 Outstanding - June 30, 2017 4,080,915 $ 18.15 214,467 $ 19.17 Exercisable - June 30, 2017 2,242,901 $ 16.97 34,334 $ 17.59
Share-Based Compensation Outstanding and Exercisable Options	Outstanding and exercisable stock options at June 30, 2017 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 $10.04 - $15.38 1,093,446 4.80 $ 13.18 717,394 3.59 $ 12.74 $15.41 - $23.45 2,852,141 6.61 $ 19.12 1,331,371 4.76 $ 18.13 $23.49 - $35.50 328,075 3.78 $ 25.53 228,470 1.29 $ 23.65 $39.65 - $39.65 21,720 9.62 39.65 - - $ - 4,295,382 5.95 $ 18.20 2,277,235 $ 4.04 $ 16.98
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, 2017, 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, 2016 760,915 $ 17.49 105,935 $ 16.67 Granted 271,113 $ 23.23 67,790 $ 22.09 Vested (200,799 ) $ 17.22 (29,470 ) $ 17.22 Forfeited (19,396 ) $ 18.32 (3,328 ) $ 18.61 Nonvested - June 30, 2017 811,833 $ 19.45 140,927 $ 19.12
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, 2017, 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, 2016 293,541 $ 16.12 98,659 $ 18.44 Granted 234,174 $ 21.67 10,808 $ 21.67 Vested (88,354 ) $ 15.56 (58,654 ) $ 18.52 Forfeited (61,651 ) $ 17.16 (33,661 ) $ 18.70 Nonvested - June 30, 2017 377,710 $ 19.52 17,152 $ 19.37

Segment and Geographic Report42

Segment and Geographic Reporting (Tables)	12 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Financial Information of Company's Operation by Segment	The following tables summarize selected financial information of the Company’s operations by segment: II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2017 Revenues $ 339,341 $ 418,515 $ 214,190 $ - $ 972,046 Inter-segment revenues 33,792 14,236 10,189 (58,217 ) - Operating income 30,931 62,975 21,635 - 115,541 Interest expense - - - - (6,809 ) Other income, net - - - - 10,056 Income taxes - - - - (23,514 ) Net earnings - - - - 95,274 Depreciation and amortization 24,958 21,442 17,237 - 63,637 Expenditures for property, plant & equipment 82,760 27,397 32,788 - 142,945 Segment assets 589,239 578,315 309,743 - 1,477,297 Equity investment - - 11,727 - 11,727 Goodwill 84,180 113,272 52,890 - 250,342 II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2016 Revenues $ 303,002 $ 325,879 $ 198,335 $ - $ 827,216 Inter-segment revenues 24,290 12,081 7,274 (43,645 ) - Operating income 36,184 37,849 17,780 - 91,813 Interest expense - - - - (3,081 ) Other income, net - - - - 1,223 Income taxes - - - - (24,469 ) Net earnings - - - - 65,486 Depreciation and amortization 17,222 19,855 19,586 - 56,663 Expenditures for property, plant & equipment 25,620 21,096 11,454 - 58,170 Segment assets 469,754 467,486 274,741 - 1,211,981 Equity investment - - 11,354 - 11,354 Goodwill 84,105 96,760 52,890 - 233,755 II-VI II-VI Laser II-VI Performance Solutions Photonics Products Eliminations Total ($000) 2015 Revenues $ 287,881 $ 260,825 $ 193,255 $ - $ 741,961 Inter-segment revenues 21,021 13,210 9,325 (43,556 ) - Operating income 55,039 7,208 14,552 - 76,799 Interest expense - - - - (3,863 ) Other income, net - - - - 6,176 Income taxes - - - - (13,137 ) Net earnings - - - - 65,975 Depreciation and amortization 14,127 21,073 17,883 - 53,083 Expenditures for property, plant & equipment 27,349 11,324 13,640 - 52,313
Geographic Information for Revenues from Country of Origin (Shipped from), and Long-Lived Assets from Country of Origin	Geographic information for revenues from the country of origin (shipped from), 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, were as follows: Revenues Year Ended June 30, 2017 2016 2015 ($000) United States $ 294,200 $ 266,347 $ 241,974 Non-United States China 208,595 172,292 140,586 Hong Kong 190,702 140,821 109,428 Germany 88,304 72,070 77,524 Japan 76,212 57,287 52,864 Switzerland 50,497 54,760 56,940 Vietnam 22,497 24,267 24,307 Italy 10,791 10,160 9,313 United Kingdom 8,473 8,154 7,749 Belgium 7,503 6,026 5,731 Korea 6,584 3,887 - Singapore 3,913 3,039 3,897 Philippines 3,057 8,106 11,334 Taiwan 718 - - Australia - - 314 Total Non-United States 677,846 560,869 499,987 $ 972,046 $ 827,216 $ 741,961 Long-Lived Assets June 30, 2017 2016 2015 ($000) United States $ 240,029 $ 137,521 $ 102,171 Non-United States China 62,024 51,824 46,794 Switzerland 36,795 38,202 26,384 Germany 15,323 15,162 15,790 Vietnam 8,272 8,895 7,985 Philippines 6,115 4,399 6,003 Hong Kong 1,914 1,765 2,476 Other 1,100 1,146 1,282 Total Non-United States 131,543 121,393 106,714 $ 371,572 $ 258,914 $ 208,885

Fair Value of Financial Instr43

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jun. 30, 2017
Summary by Level of Fair Value of Financial Instruments Measured on Recurring Basis	The following tables provide a summary by level of the fair value of financial instruments that are measured on a recurring basis as of June 30, 2017 and 2016 ($000): Fair Value Measurements at June 30, 2017 Using: Quoted Prices in Significant Active Markets Other Significant for Identical Observable Unobservable Assets Inputs Inputs June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Foreign currency forward contracts $ 191 $ - $ 191 $ - Liabilities: Contingent earnout arrangements $ 5,795 $ - $ - $ 5,795 Fair Value Measurements at June 30, 2016 Using: Quoted Prices in Significant Active Markets Other Significant for Identical Observable Unobservable Assets Inputs Inputs June 30, 2016 (Level 1) (Level 2) (Level 3) Liabilities: Foreign currency forward contracts $ 511 $ - $ 511 $ - Contingent earnout arrangement $ 4,352 $ - $ - $ 4,352
EpiWorks and IPI
Reconciliation of Beginning and Ending Fair Value Measurements of Level Three Contingent Earnout Arrangement Related to Acquisitions	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 acquisitions of II-VI EpiWorks and IPI ($000): Significant Unobservable Inputs (Level 3) Balance at July 1, 2016 $ 4,352 Contingent earnout arrangements: Contingent earnout - IPI 2,250 Payments (2,000 ) Changes in fair value recorded in other expense, (income) 1,193 Balance at June 30, 2017 $ 5,795

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2017
Compensation And Retirement Disclosure [Abstract]
Schedule of Changes in Projected Benefit Obligations and Plan Assets	The funded status of the Swiss Plan in the fiscal years ended June 30, 2017 and 2016 were as follows: Year Ended June 30, 2017 2016 Change in projected benefit obligation: Projected benefit obligation, beginning of period $ 54,094 $ 42,575 Service cost 3,689 2,680 Interest cost 163 434 Participant contributions 1,262 1,046 Benefits received 1,743 1,567 Actuarial (gain) loss on obligation (2,777 ) 8,071 Currency translation adjustment 1,344 (2,279 ) Projected benefit obligation, end of period $ 59,518 $ 54,094 Change in plan assets: Plan assets at fair value, beginning of period 35,857 32,509 Actual return on plan assets 805 431 Employer contributions 2,432 2,043 Participant contributions 1,262 1,046 Benefits received 1,743 1,567 Currency translation adjustment 891 (1,739 ) Plan assets at fair value, end of period $ 42,990 $ 35,857 Amounts recognized in consolidated balance sheets: Other non-current assets: Deferred tax asset $ 3,496 $ 3,857 Other non-current liabilities: Underfunded pension liability $ 16,528 18,237 Amounts recognized in accumulated other comprehensive income, net of tax: Pension adjustment $ 2,514 $ (7,031 ) Accumulated benefit obligation, end of period $ 56,457 $ 50,772
Schedule of Net Periodic Pension Costs	Net periodic pension cost associated with the Swiss Plan included the following components: Year Ended June 30, 2017 2016 Service cost $ 3,689 $ 2,680 Interest cost 163 434 Expected return on plan assets (742 ) (1,097 ) Prior service cost 594 (234 ) Net period pension cost $ 3,704 $ 1,783
Schedule of Projected and Accumulated Benefit Obligations Rates	The projected and accumulated benefit obligations for the Swiss Plan were calculated as of June 30, 2017 and 2016 using the following assumptions: Year Ended June 30, 2017 2016 Discount rate 0.8 % 0.3 % Salary increase rate 2.0 % 2.0 % Expected return on plan assets 2.0 % 2.0 % Expected average remaining working life (in years) 9.9 10.2
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, 2017, the Swiss Plan’s asset allocation was as follows: Year Ended June 30, 2017 2016 Fixed income investments 10.0 % 15.0 % Equity investments 52.0 % 51.0 % Real estate 26.0 % 28.0 % Cash 9.0 % 3.0 % Alternative investments 3.0 % 3.0 % 100.0 % 100.0 %
Schedule of Estimated Future Benefit Payments Under Swiss Plan	Estimated future benefit payments under the Swiss Plan are estimated to be as follows: Year Ending June 30, ($000) 2018 $ 2,683 2019 4,062 2020 1,575 2021 2,533 2022 2,681 Next five years 19,163

Other Accrued Liabilities (Tabl

Other Accrued Liabilities (Tables)	12 Months Ended
	Jun. 30, 2017
Payables And Accruals [Abstract]
Components of Other Accrued Liabilities	The components of other accrued liabilities were as follows: Year Ended June 30, 2017 2016 ($000) Deferred revenue $ 2,345 $ 4,014 Warranty reserve 4,546 3,908 Current portion of earnout arrangements 3,930 1,935 Other accrued liabilities 18,235 15,989 $ 29,056 $ 25,846
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, 2017. Year Ended June 30, 2017 ($000) Balance-Beginning of Year $ 3,908 Settlements during the period (4,212 ) Additional warranty liability recorded 4,850 Balance-End of Year $ 4,546

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2017
Guarantees [Abstract]
Schedule of Future Commitments	Total future commitments are as follows: Year Ending June 30, ($000) 2018 $ 21,988 2019 866 2020 578 2021 - 2022 -

Accumulated Other Comprehensi47

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income ("AOCI") by Component, Net of Tax	The changes in accumulated other comprehensive income (“AOCI”) by component, net of tax, for the years ended June 30, 2017, 2016, and 2015 were as follows ($000): Foreign Total Currency Defined Accumulated Other Translation Benefit Comprehensive Adjustment Pension Plan Income AOCI - June 30, 2014 $ 17,963 $ 1,443 $ 19,406 Other comprehensive income (loss) before reclassifications (8,497 ) (2,244 ) (10,741 ) Amounts reclassified from AOCI - - - Net current-period other comprehensive income (8,497 ) (2,244 ) (10,741 ) AOCI - June 30, 2015 9,466 (801 ) 8,665 Other comprehensive income (loss) before reclassifications (15,651 ) (6,805 ) (22,456 ) Amounts reclassified from AOCI - (226 ) (226 ) Net current-period other comprehensive income (15,651 ) (7,031 ) (22,682 ) AOCI - June 30, 2016 $ (6,185 ) $ (7,832 ) $ (14,017 ) Other comprehensive income (loss) before reclassifications (2,275 ) 1,920 (355 ) Amounts reclassified from AOCI - 594 594 Net current-period other comprehensive income (2,275 ) 2,514 239 AOCI - June 30, 2017 $ (8,460 ) $ (5,318 ) $ (13,778 )

Capital Lease (Tables)

Capital Lease (Tables)	12 Months Ended
	Jun. 30, 2017
Leases [Abstract]
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 June 30, Amount 2018 $ 2,579 2019 2,579 2020 2,579 2021 2,579 2022 2,579 Thereafter 24,503 Total minimum lease payments $ 37,398 Less amount representing interest 12,909 Present value of capitalized payments $ 24,489 Less: current portion 1,074 Long-term portion $ 23,415

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Jun. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Fiscal Year 2017 September 30, December 31, March 31, June 30, Quarter Ended 2016 2016 2017 2017 ($000) 2017 Net revenues $ 221,520 $ 231,822 $ 244,987 $ 273,717 Cost of goods sold 133,918 137,559 147,277 164,939 Internal research and development 21,832 23,632 25,380 25,966 Selling, general and administrative 42,079 43,495 43,291 47,137 Interest expense 1,246 1,365 1,936 2,262 Other expense (income) - net (1,402 ) (6,045 ) (2,164 ) (445 ) Earnings before income taxes 23,847 31,816 29,267 33,858 Income taxes 7,553 7,913 6,837 1,211 Net Earnings $ 16,294 $ 23,903 $ 22,430 $ 32,647 Basic earnings per share $ 0.26 $ 0.38 $ 0.36 $ 0.52 Diluted earnings per share $ 0.26 $ 0.37 $ 0.35 $ 0.50 Fiscal Year 2016 September 30, December 31, March 31, June 30, Quarter Ended 2015 2015 2016 2016 ($000) 2016 Net revenues $ 189,207 $ 191,434 $ 205,105 $ 241,470 Cost of goods sold 118,018 120,090 127,436 148,859 Internal research and development 13,151 12,155 14,946 20,102 Selling, general and administrative 36,310 37,408 43,333 43,595 Interest expense 649 597 769 1,066 Other expense (income) - net (1,057 ) (994 ) 1,257 (429 ) Earnings before income taxes 22,136 22,178 17,364 28,277 Income taxes 4,922 3,187 2,426 13,934 Net Earnings $ 17,214 $ 18,991 $ 14,938 $ 14,343 Basic earnings per share $ 0.28 $ 0.31 $ 0.24 $ 0.23 Diluted earnings per share $ 0.27 $ 0.30 $ 0.24 $ 0.23

Nature of Business and Summar50

Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Significant Accounting Policies [Line Items]
Accounts receivable factored	$ 23,100,000	$ 20,500,000
Inventory reserve amount	$ 18,500,000	17,700,000
Property, plant and equipment estimated useful lives, years	15 years
Total carrying value of equity method investment	$ 11,700,000	11,400,000
Pro-rata share of earnings from equity method investment	744,000	29,000	$ 948,000
Loss contingency liability	$ 0
Maximum percentage of total revenues represented by distributors and agents that are not granted price protection	10.00%
Maximum percentage of contract related revenues	1.00%
Accumulated foreign currency translation adjustments, net of income taxes	$ (8,400,000)	(6,200,000)
Accumulated pension adjustments, net of income taxes	$ (5,400,000)	(7,800,000)
ASU 2015-03
Significant Accounting Policies [Line Items]
Reclassification as unamortized debt issuance costs		600,000
ASU 2014-09 | Military Related Contracts | Consolidated Revenues | Product Concentration Risk
Significant Accounting Policies [Line Items]
Percentage of consolidated revenues	10.00%
Guangdong Fuxin Electronic Technology
Significant Accounting Policies [Line Items]
Non-controlling minority interest	20.20%
Pro-rata share of earnings from equity method investment	$ 700,000	100,000	900,000
Dividends from equity investment	$ 400,000	$ 600,000	$ 600,000
Minimum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	5 years
Maximum
Significant Accounting Policies [Line Items]
Finite-lived intangible assets useful life, years	20 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	20 years

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)	Jun. 03, 2016	Jun. 30, 2017	Mar. 31, 2016	Feb. 29, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Net cash paid at acquisition						$ 40,015,000	$ 122,157,000
Goodwill		$ 250,342,000				250,342,000	233,755,000	$ 195,894,000
Goodwill attributed to the RF business sold							35,352,000
Deferred income taxes, valuation allowance		42,562,000				42,562,000	42,641,000
Proceeds from the sale of business							45,000,000
Integrated Photonics, Inc
Business Acquisition [Line Items]
Net cash paid at acquisition		39,436,000
Payment of additional amount for working capital adjustment		700,000
Goodwill		17,107,000				17,107,000
Fair value of accounts receivable acquired		2,100,000				2,100,000
Fair value of accounts receivable gross contractual amount		2,100,000				2,100,000
Business acquisition, transaction costs		300,000				300,000
Integrated Photonics, Inc | Upon Achievement of Financial And Transitional Objectives Relating to Finance Information Technology And Human Resources
Business Acquisition [Line Items]
Business acquisitions, contingent consideration, current		2,500,000				2,500,000
Integrated Photonics, Inc | Upon Achievement of Financial And Transitional Objectives Relating to Finance Information Technology And Human Resources | Maximum
Business Acquisition [Line Items]
Business acquisitions, contingent consideration		$ 2,500,000				$ 2,500,000
DirectPhotonics Industries GmbH | Germany
Business Acquisition [Line Items]
Payment for purchase of certain assets					$ 600,000
EpiWorks
Business Acquisition [Line Items]
Net cash paid at acquisition				$ 42,981,000
Payment of additional amount for working capital adjustment				163,000
Goodwill				27,588,000
Fair value of accounts receivable acquired				2,100,000
Fair value of accounts receivable gross contractual amount				2,100,000
Business acquisition, transaction costs							400,000
EpiWorks | Upon Achievement of Financial and Operational Targets For Capacity Wafer Output and Gross Margin | Maximum
Business Acquisition [Line Items]
Business acquisitions, contingent consideration				6,000,000
EpiWorks | Upon Achievement of Financial and Operational Targets for Capacity, Wafer Output and Gross Margin in Year One
Business Acquisition [Line Items]
Business acquisitions, contingent consideration, current				2,000,000
EpiWorks | Upon Achievement of Financial and Operational Targets for Capacity, Wafer Output and Gross Margin in Year Two
Business Acquisition [Line Items]
Business acquisitions, contingent consideration, non current				2,000,000
EpiWorks | Upon Achievement of Financial and Operational Targets for Capacity, Wafer Output and Gross Margin in Year Three
Business Acquisition [Line Items]
Business acquisitions, contingent consideration, non current				$ 2,000,000
ANADIGICS
Business Acquisition [Line Items]
Net cash paid at acquisition			$ 78,200,000
Payment of additional amount for working capital adjustment			3,500,000
Goodwill			48,312,000
Fair value of accounts receivable acquired			4,000,000
Fair value of accounts receivable gross contractual amount			4,000,000
Business acquisition, transaction costs							2,900,000
Business acquisition, cash acquired			$ 2,700,000
Goodwill attributed to the RF business sold	$ 35,400,000
Deferred income taxes, valuation allowance	36,200,000
RF Business of ANADIGICS
Business Acquisition [Line Items]
Proceeds from the sale of business	45,000,000
Working capital adjustment to be received from divesture of business	600,000
Contingent consideration to be earned from divesture of business	$ 5,000,000
Contingent consideration, period	18 months
Contingent consideration recognized in net earnings	$ 5,000,000
Business divesture transaction expenses							400,000
Severance expense for employees of the business	$ 7,500,000
Business acquisition, revenue of acquired entity							10,100,000
Business acquisition, loss of acquired entity							8,400,000
RF Business of ANADIGICS | Maximum
Business Acquisition [Line Items]
Working capital adjustment recognition period	60 days
Gain on sale of business							$ 100,000

Purchase Price at the Date of A

Purchase Price at the Date of Acquisition (Detail) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 30, 2017	Feb. 29, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Net cash paid at acquisition			$ 40,015	$ 122,157
Integrated Photonics, Inc
Business Acquisition [Line Items]
Net cash paid at acquisition	$ 39,436
Cash paid for working capital adjustment	700
Fair value of cash earnout arrangement	2,250
Purchase price	$ 41,686
EpiWorks
Business Acquisition [Line Items]
Net cash paid at acquisition		$ 42,981
Cash paid for working capital adjustment		163
Fair value of cash earnout arrangement		4,352
Purchase price		$ 47,496

Allocation of Purchase Price of

Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail)) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Jun. 30, 2015
Assets
Goodwill	$ 250,342	$ 233,755			$ 195,894
Integrated Photonics, Inc
Assets
Accounts receivable	2,083
Inventories	3,968
Prepaid and other assets	322
Property, plant & equipment	11,257
Intangible assets	22,213
Goodwill	17,107
Total assets acquired	56,950
Liabilities
Accounts payable	846
Other accrued liabilities	1,032
Long-term debt assumed	3,834
Deferred tax liabilities	9,552
Total liabilities assumed	15,264
Net assets acquired	$ 41,686
EpiWorks
Assets
Accounts receivable				$ 2,121
Inventories				2,435
Prepaid and other assets				68
Property, plant & equipment				9,043
Intangible assets				14,124
Goodwill				27,588
Total assets acquired				55,379
Liabilities
Accounts payable				605
Other accrued liabilities				859
Deferred tax liabilities				6,419
Total liabilities assumed				7,883
Net assets acquired				$ 47,496
ANADIGICS
Assets
Accounts receivable			$ 3,973
Inventories			8,322
Prepaid and other assets			2,347
Property, plant & equipment			25,810
Intangible assets			1,060
Goodwill			48,312
Total assets acquired			89,824
Liabilities
Accounts payable			3,586
Other accrued liabilities			7,226
Total liabilities assumed			10,812
Net assets acquired			$ 79,012

Carrying Value of the Assets an

Carrying Value of the Assets and Liabilities Included as Part of Disposal (Detail) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - RF Business of ANADIGICS $ in Thousands	Jun. 03, 2016USD ($)
Assets
Inventories	$ 5,378
Equipment	5,813
Goodwill	35,352
Total assets	46,543
Liabilities
Accounts payable	963
Contingent consideration to be earned from divesture of business	$ 45,580

Components of Inventories, Net

Components of Inventories, Net of Reserves (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 78,979	$ 70,623
Work in progress	61,679	57,566
Finished goods	63,037	46,944
Inventories, Total	$ 203,695	$ 175,133

Property Plant and Equipment (D

Property Plant and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 730,460	$ 559,362
Less accumulated depreciation	(362,732)	(316,505)
Property, Plant and Equipment, net	367,728	242,857
Land and Land Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	5,667	4,990
Buildings and Improvements
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	144,293	110,219
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	492,042	409,551
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, gross	$ 88,458	$ 34,602

Property Plant and Equipment -

Property Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Property Plant And Equipment [Line Items]
Depreciation expense		$ 50,894	$ 44,324	$ 41,114
Manufacturing Facility
Property Plant And Equipment [Line Items]
Proceeds from sale of manufacturing facility	$ 1,700
Proceeds held in escrow for environmental purpose	300
Gain on sale of manufacturing facility	$ 300

Changes in Carrying Amount of G

Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Goodwill [Line Items]
Balance-beginning of period	$ 233,755	$ 195,894
Goodwill acquired	17,107	75,900
Goodwill attributed to the RF business sold		(35,352)
Foreign currency translation	(520)	(2,687)
Balance-end of period	250,342	233,755
II-VI Laser Solutions
Goodwill [Line Items]
Balance-beginning of period	84,105	43,578
Goodwill acquired		75,900
Goodwill attributed to the RF business sold		(35,352)
Foreign currency translation	75	(21)
Balance-end of period	84,180	84,105
II-VI Photonics
Goodwill [Line Items]
Balance-beginning of period	96,760	99,426
Goodwill acquired	17,107
Foreign currency translation	(595)	(2,666)
Balance-end of period	113,272	96,760
II- VI Performance Products
Goodwill [Line Items]
Balance-beginning of period	52,890	52,890
Balance-end of period	$ 52,890	$ 52,890

Gross Carrying Amount and Accum

Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 205,873	$ 183,925
Accumulated Amortization	(71,916)	(59,335)
Net Book Value	133,957	124,590
Technology and Patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	65,438	54,344
Accumulated Amortization	(27,313)	(22,724)
Net Book Value	38,125	31,620
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,806	15,869
Accumulated Amortization	(1,340)	(1,209)
Net Book Value	14,466	14,660
Customer Lists
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	123,058	112,141
Accumulated Amortization	(41,740)	(33,912)
Net Book Value	81,318	78,229
Other
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,571	1,571
Accumulated Amortization	(1,523)	(1,490)
Net Book Value	$ 48	$ 81

Goodwill and Other Intangible60

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Goodwill And Other Intangible Assets [Line Items]
Amortization expense recorded on intangible assets	$ 12,700	$ 12,300	$ 12,000
Carrying amount of indefinite trade names acquired	14,000
Impairment of intangible assets			$ 1,964
IPI
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 22,213
Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	5 years
Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	20 years
Technology and Patents
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months	100 months
Technology and Patents | IPI
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 11,300
Technology and Patents | Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	60 months
Technology and Patents | Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	240 months
Customer Lists
Goodwill And Other Intangible Assets [Line Items]
Remaining amortization period of patents and customer lists, in months	149 months
Customer Lists | IPI
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangibles assets recorded in connection with acquisitions	$ 10,900
Customer Lists | Minimum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	60 months
Customer Lists | Maximum
Goodwill And Other Intangible Assets [Line Items]
Amortization period of finite lived intangible assets, in months	240 months

Estimated Amortization Expense

Estimated Amortization Expense for Existing Intangible Assets for Each of Five Succeeding Years (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2,018	$ 13,800
2,019	13,500
2,020	12,500
2,021	11,800
2,022	$ 10,300

Components of Debt (Detail)

Components of Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Line Of Credit Facility [Line Items]
Total debt	$ 343,513	$ 235,917
Current portion of long-term debt	(20,000)	(20,000)
Unamortized debt issuance costs	(1,491)	(610)
Long-term debt, less current portion	322,022	215,307
Line of credit
Line Of Credit Facility [Line Items]
Total debt	252,000	188,000
Term Loans
Line Of Credit Facility [Line Items]
Total debt	85,000	45,000
Yen denominated line of credit
Line Of Credit Facility [Line Items]
Total debt	2,679	$ 2,917
Note payable
Line Of Credit Facility [Line Items]
Total debt	3,834
Note payable | IPI
Line Of Credit Facility [Line Items]
Total debt	$ 3,834

Components of Debt (Parenthetic

Components of Debt (Parenthetical) (Detail) - London Interbank Offered Rate (LIBOR)	12 Months Ended
	Jun. 30, 2017
Line of credit
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.50%
Term Loans
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.50%
Yen denominated line of credit
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	0.625%

Debt - Additional Information (

Debt - Additional Information (Detail)	Jul. 28, 2016USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2017JPY (¥)
Line Of Credit Facility [Line Items]
Available credit under lines of credit		$ 73,500,000	$ 37,700,000
Total outstanding letters of credit		$ 1,300,000	$ 1,200,000
Weighted average interest rate of total borrowings		2.20%	1.60%		2.20%
Weighted average of total borrowings		$ 272,100,000	$ 193,700,000
Credit facility, interest paid		6,100,000	3,100,000	$ 4,000,000
Credit facility, commitment fees paid		$ 6,100,000	3,100,000	$ 4,000,000
IPI | Note payable
Line Of Credit Facility [Line Items]
Debt instrument, month and year of maturity		2019-05
Singapore Bank
Line Of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		$ 600,000	600,000
Total outstanding letters of credit		$ 0	$ 0
Weighted average interest rate of total borrowings		5.25%	5.25%		5.25%
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	$ 325,000,000
Credit facility, term	5 years
Debt instrument, maturity date	Jul. 28, 2021
Term Loans
Line Of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity	$ 100,000,000
Term loan, quarterly principal Payment	$ 5,000,000
Debt instrument, month and year of maturity	2021-07
Term loan, first quarterly principal payment commencement date	Oct. 1, 2016
Yen denominated line of credit
Line Of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		$ 4,900,000			¥ 500,000,000
Debt instrument, month and year of maturity		2020-08
Line of credit, outstanding		$ 2,700,000			¥ 300,000,000
Letter Of Credit | Singapore Bank
Line Of Credit Facility [Line Items]
Line of credit facility		$ 300,000	$ 200,000
Maximum | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Credit facility, optional additional borrowing amount	$ 100,000,000
Base Rate Option | Maximum | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.25%
Base Rate Option | Minimum | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	0.00%
Euro Rate Option | Maximum | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	2.25%
Euro Rate Option | Maximum | Yen denominated line of credit
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.25%
Euro Rate Option | Minimum | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.00%
Euro Rate Option | Minimum | Yen denominated line of credit
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.00%
Prime Rate | Singapore Bank
Line Of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.00%	1.00%

Remaining Annual Principal Paym

Remaining Annual Principal Payments of Credit Facilities and Note Payable (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Line Of Credit Facility [Line Items]
Year 1	$ 20,000
Year 2	23,834
Year 3	20,000
Year 4	22,679
Year 5	257,000
Total debt	343,513	$ 235,917
Term Loans
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	20,000
Year 4	20,000
Year 5	5,000
Total debt	85,000	45,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Year 4	2,679
Total debt	2,679	2,917
U.S. Dollar Line of Credit
Line Of Credit Facility [Line Items]
Year 5	252,000
Total debt	252,000	$ 188,000
Note Payable
Line Of Credit Facility [Line Items]
Year 2	3,834
Total debt	$ 3,834

Components of Earnings (Losses)

Components of Earnings (Losses) Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
U.S. loss									$ (6,944)	$ (5,809)	$ (5,326)
Non-U.S. income									125,732	95,764	84,438
Earnings Before Income Taxes	$ 33,858	$ 29,267	$ 31,816	$ 23,847	$ 28,277	$ 17,364	$ 22,178	$ 22,136	$ 118,788	$ 89,955	$ 79,112

Components of Income Tax Expens

Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Current, Federal									$ 2,133	$ 3,704	$ (146)
Current, State									253	5	86
Current, Foreign									22,312	19,783	16,978
Total Current									24,698	23,492	16,918
Deferred, Federal									(6,963)	2,759	(2,762)
Deferred, State									(1,251)	1,302	(251)
Deferred, Foreign									7,030	(3,084)	(768)
Total Deferred									(1,184)	977	(3,781)
Total Income Tax Expense	$ 1,211	$ 6,837	$ 7,913	$ 7,553	$ 13,934	$ 2,426	$ 3,187	$ 4,922	$ 23,514	$ 24,469	$ 13,137

Schedule of Principal Items Com

Schedule of Principal Items Comprising Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Inventory capitalization	$ 6,338	$ 6,814
Non-deductible accruals	1,705	2,212
Accrued employee benefits	9,738	15,543
Net-operating loss and credit carryforwards	53,048	43,516
Share-based compensation expense	12,386	11,693
Other	1,761	1,770
Valuation allowances	(42,562)	(42,641)
Total deferred income tax assets	42,414	38,907
Tax over book accumulated depreciation	(7,803)	(9,759)
Intangible assets	(38,108)	(29,628)
Tax on unremitted earnings	(6,210)	(797)
Other	(2,615)	(1,978)
Total deferred income tax liabilities	(54,736)	(42,162)
Net deferred income taxes	$ (12,322)	$ (3,255)

Schedule of Reconciliation of I

Schedule of Reconciliation of Income Tax Expense at Statutory Federal Rate to Reported Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Taxes at statutory rate, amount									$ 41,576	$ 31,484	$ 27,689
State income taxes-net of federal benefit, amount									(641)	864	(196)
Taxes on non U.S. earnings, amount									(12,907)	(13,860)	(11,687)
Valuation allowance, amount									(806)	8,464	678
Research and manufacturing incentive deductions, amount									(3,346)	(3,074)	(2,573)
Other, amount									(362)	591	(774)
Total Income Tax Expense	$ 1,211	$ 6,837	$ 7,913	$ 7,553	$ 13,934	$ 2,426	$ 3,187	$ 4,922	$ 23,514	$ 24,469	$ 13,137
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									(11.00%)	(15.00%)	(15.00%)
Valuation allowance, rate									(1.00%)	9.00%	1.00%
Research and manufacturing incentive deductions, rate									(3.00%)	(3.00%)	(3.00%)
Other, rate											(1.00%)
Total Effective Income Tax, rate									20.00%	27.00%	17.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Contingency [Line Items]
Cash paid for income taxes	$ 23,600,000	$ 18,500,000	$ 13,000,000
Effective income tax rate, reductions	0.31%	0.37%	0.22%
Cumulative foreign undistributed net earnings	$ 715,000,000
Additional deferred tax liability due to undistributed foreign earnings	108,000,000
Interest and penalties recognized within income tax expense (benefit)	500,000	$ 0	$ 100,000
Interest and penalties accrued	300,000	100,000	$ 100,000
Unrecognized tax benefits that would impact effective tax rate	1,300,000	$ 500,000
Unrecognized tax benefits expected decrease during the next 12 months	$ 400,000
Internal Revenue Service | Earliest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,014
Internal Revenue Service | Latest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,017
State Jurisdictions | Earliest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,012
State Jurisdictions | Latest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,017
Foreign Taxing Jurisdictions | Earliest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,007
Foreign Taxing Jurisdictions | Latest Tax Year
Income Tax Contingency [Line Items]
Tax year remain open to examination	2,017
Subsidiary in Germany
Income Tax Contingency [Line Items]
Income tax examination, year(s) under examination	2,018

Schedule of Gross Operating Los

Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2017USD ($)
Federal research and development credits
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 10,953
Federal research and development credits | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2019-06
Federal research and development credits | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2037-06
Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 4,539
Loss carryforwards	$ 2,610
Foreign | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2024-06
Loss carryforwards, expiration date	2018-06
Foreign | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2027-06
Loss carryforwards, expiration date	2024-06
State
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 4,820
Loss carryforwards	$ 71,536
State | Minimum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2018-06
Loss carryforwards, expiration date	2018-06
State | Maximum
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards, expiration date	2037-06
Loss carryforwards, expiration date	2037-06
Federal
Operating Loss Carryforwards [Line Items]
Loss carryforwards	$ 100,922
Federal | Minimum
Operating Loss Carryforwards [Line Items]
Loss carryforwards, expiration date	2020-06
Federal | Maximum
Operating Loss Carryforwards [Line Items]
Loss carryforwards, expiration date	2037-06

Schedule of Changes in Liabilit

Schedule of Changes in Liability for Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Balance at Beginning of Year	$ 5,559	$ 4,022	$ 2,775
Increases in current year tax positions	895	2,146	2,450
Increases in prior year tax positions	2,605	190	203
Decreases in prior year tax positions		(67)
Settlements	(1,143)
Expiration of statute of limitations	(339)	(732)	(1,406)
Balance at End of Year	$ 7,577	$ 5,559	$ 4,022

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Weighted Average
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	140,000	153,000	576,000

Computation of Earnings Per Sha

Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net earnings									$ 95,274	$ 65,486	$ 65,975
Weighted average shares									62,576	61,366	61,219
Basic earnings per common share	$ 0.52	$ 0.36	$ 0.38	$ 0.26	$ 0.23	$ 0.24	$ 0.31	$ 0.28	$ 1.52	$ 1.07	$ 1.08
Net earnings									$ 95,274	$ 65,486	$ 65,975
Weighted average shares									62,576	61,366	61,219
Dilutive effect of common stock equivalents									1,931	1,543	1,367
Diluted weighted average common shares									64,507	62,909	62,586
Diluted earnings per common share	$ 0.50	$ 0.35	$ 0.37	$ 0.26	$ 0.23	$ 0.24	$ 0.30	$ 0.27	$ 1.48	$ 1.04	$ 1.05

Operating Leases - Additional I

Operating Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Leases [Abstract]
Rent expense	$ 14.7	$ 14.2	$ 15

Operating Lease Future Rental C

Operating Lease Future Rental Commitments (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Leases [Abstract]
2,018	$ 14,400
2,019	12,400
2,020	10,500
2,021	6,800
2,022	4,600
Thereafter	$ 17,900

Share-Based Compensation Plan77

Share-Based Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [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	$ 16,036	$ 10,906	$ 12,989
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, outstanding	69,300	10,100	14,300
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, exercised	69,300	10,100	14,300
Total intrinsic value of stock options and cash-based stock appreciation rights, exercised	$ 12,300	4,500	2,900
Unrecognized compensation cost, weighted-average period of recognition, years	3 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance share grant, period	12 months
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance share grant, period	36 months
Stock Options and Cash-Based Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 5,611	$ 4,309	$ 5,158
Weighted-average fair values of stock options granted under the stock option Plan	$ 8.88	$ 7.35	$ 5.76
Share based compensation, estimated forfeiture percentage	18.71%
Share based compensation expense attributable to non-vested shares	$ 12,000
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	$ 6,799	$ 4,401	$ 5,182
Share based compensation, estimated forfeiture percentage	13.00%
Share based compensation, vesting period years	3 years
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares	$ 9,500
Unrecognized compensation cost, weighted-average period of recognition, years	2 years
Total fair value of restricted stock grant	$ 7,800	6,300	5,900
Total fair value of restricted stock vested	6,200	5,500	5,100
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares	$ 4,200
Unrecognized compensation cost, weighted-average period of recognition, years	1 year
Total fair value of restricted stock grant	$ 5,300	2,400	2,300
Total fair value of restricted stock vested	5,900	1,500	1,600
Liability Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 4,300	$ 1,200	$ 1,600
Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock authorized for issuance under the Plan	4,900,000
Shares available to be issued under the Plan	1,644,000

Share-Based Compensation Expens

Share-Based Compensation Expense by Award Type (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	$ 16,036	$ 10,906	$ 12,989
Stock Options and Cash-Based Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense	5,611	4,309	5,158
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	6,799	4,401	5,182
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	$ 3,626	$ 2,196	$ 2,649

Fair Value Assumptions for Stoc

Fair Value Assumptions for Stock Option and Stock Appreciation Rights (Detail)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	1.43%	1.68%	1.71%
Expected volatility	37.00%	38.00%	41.00%
Expected life of options	6 years 3 months 11 days	6 years 5 months 5 days	5 years 11 months 9 days
Dividend yield	0.00%	0.00%	0.00%

Stock Option and Cash-Based Sto

Stock Option and Cash-Based Stock Appreciation Rights Activity (Detail)	12 Months Ended
	Jun. 30, 2017$ / sharesshares
Number of Shares
Outstanding - July 1, 2016 | shares	4,251,926
Granted | shares	771,900
Exercised | shares	(858,445)
Forfeited and Expired | shares	(84,466)
Outstanding - June 30, 2017 | shares	4,080,915
Exercisable - June 30, 2017 | shares	2,242,901
Weighted Average Exercise Price
Outstanding - July 1, 2016 | $ / shares	$ 17.15
Granted | $ / shares	23.15
Exercised | $ / shares	17.58
Forfeited and Expired | $ / shares	19.62
Outstanding - June 30, 2017 | $ / shares	18.15
Exercisable - June 30, 2017 | $ / shares	$ 16.97
Cash-Based Stock Appreciation Rights
Number of Shares
Outstanding - July 1, 2016 | shares	178,234
Granted | shares	86,705
Exercised | shares	(44,856)
Forfeited and Expired | shares	(5,616)
Outstanding - June 30, 2017 | shares	214,467
Exercisable - June 30, 2017 | shares	34,334
Weighted Average Exercise Price
Outstanding - July 1, 2016 | $ / shares	$ 17.13
Granted | $ / shares	22.51
Exercised | $ / shares	17.42
Forfeited and Expired | $ / shares	19.39
Outstanding - June 30, 2017 | $ / shares	19.17
Exercisable - June 30, 2017 | $ / shares	$ 17.59

Share-Based Compensation Outsta

Share-Based Compensation Outstanding and Exercisable Options (Detail)	12 Months Ended
	Jun. 30, 2017$ / sharesshares
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 | shares	4,295,382
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	5 years 11 months 12 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$ 18.20
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares | shares	2,277,235
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	4 years 15 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$ 16.98
$10.04 - $15.38
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower range	10.04
Range of Exercise Prices, Upper range	$ 15.38
$10.04 - $15.38 | 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 | shares	1,093,446
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	4 years 9 months 18 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$ 13.18
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares | shares	717,394
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	3 years 7 months 2 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$ 12.74
$15.41 - $23.45
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower range	15.41
Range of Exercise Prices, Upper range	$ 23.45
$15.41 - $23.45 | 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 | shares	2,852,141
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	6 years 7 months 10 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$ 19.12
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares | shares	1,331,371
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	4 years 9 months 3 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$ 18.13
$23.49 - $35.50
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower range	23.49
Range of Exercise Prices, Upper range	$ 35.50
$23.49 - $35.50 | 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 | shares	328,075
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	3 years 9 months 11 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$ 25.53
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Number of Shares | shares	228,470
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Remaining Contractual Term (Years)	1 year 3 months 15 days
Stock Options and Cash-Based Stock Appreciation Rights Exercisable, Weighted Average Exercise Price	$ 23.65
$39.65 - $39.65
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Range of Exercise Prices, Lower range	39.65
Range of Exercise Prices, Upper range	$ 39.65
$39.65 - $39.65 | 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 | shares	21,720
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Remaining Contractual Term (Years)	9 years 7 months 13 days
Stock Options and Cash-Based Stock Appreciation Rights Outstanding, Weighted Average Exercise Price	$ 39.65

Restricted Share and Cash-Based

Restricted Share and Cash-Based Restricted Share Unit Activity (Detail)	12 Months Ended
	Jun. 30, 2017$ / sharesshares
Restricted Stock
Number of Shares
Nonvested - June 30, 2016 | shares	760,915
Granted | shares	271,113
Vested | shares	(200,799)
Forfeited | shares	(19,396)
Nonvested - June 30, 2017 | shares	811,833
Weighted Average Grant Date Fair Value
Nonvested - June 30, 2016 | $ / shares	$ 17.49
Granted | $ / shares	23.23
Vested | $ / shares	17.22
Forfeited | $ / shares	18.32
Nonvested - June 30, 2017 | $ / shares	$ 19.45
Cash-Based Restricted Share Units
Number of Shares
Nonvested - June 30, 2016 | shares	105,935
Granted | shares	67,790
Vested | shares	(29,470)
Forfeited | shares	(3,328)
Nonvested - June 30, 2017 | shares	140,927
Weighted Average Grant Date Fair Value
Nonvested - June 30, 2016 | $ / shares	$ 16.67
Granted | $ / shares	22.09
Vested | $ / shares	17.22
Forfeited | $ / shares	18.61
Nonvested - June 30, 2017 | $ / shares	$ 19.12

Performance Share Award Activit

Performance Share Award Activity (Detail)	12 Months Ended
	Jun. 30, 2017$ / sharesshares
Performance Share Awards
Number of Shares
Nonvested - June 30, 2016 | shares	293,541
Granted | shares	234,174
Vested | shares	(88,354)
Forfeited | shares	(61,651)
Nonvested - June 30, 2017 | shares	377,710
Weighted Average Grant Date Fair Value
Nonvested - June 30, 2016 | $ / shares	$ 16.12
Granted | $ / shares	21.67
Vested | $ / shares	15.56
Forfeited | $ / shares	17.16
Nonvested - June 30, 2017 | $ / shares	$ 19.52
Cash-Based Performance Share Units
Number of Shares
Nonvested - June 30, 2016 | shares	98,659
Granted | shares	10,808
Vested | shares	(58,654)
Forfeited | shares	(33,661)
Nonvested - June 30, 2017 | shares	17,152
Weighted Average Grant Date Fair Value
Nonvested - June 30, 2016 | $ / shares	$ 18.44
Granted | $ / shares	21.67
Vested | $ / shares	18.52
Forfeited | $ / shares	18.70
Nonvested - June 30, 2017 | $ / shares	$ 19.37

Segment and Geographic Report84

Segment and Geographic Reporting - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2017Segment
Segment Reporting [Abstract]
Number of reporting segments	3

Financial Information of Compan

Financial Information of Company's Operation by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Revenues	$ 273,717	$ 244,987	$ 231,822	$ 221,520	$ 241,470	$ 205,105	$ 191,434	$ 189,207	$ 972,046	$ 827,216	$ 741,961
Operating income									115,541	91,813	76,799
Interest expense	(2,262)	(1,936)	(1,365)	(1,246)	(1,066)	(769)	(597)	(649)	(6,809)	(3,081)	(3,863)
Other income, net	445	2,164	6,045	1,402	429	(1,257)	994	1,057	10,056	1,223	6,176
Income taxes	(1,211)	(6,837)	(7,913)	(7,553)	(13,934)	(2,426)	(3,187)	(4,922)	(23,514)	(24,469)	(13,137)
Net earnings	32,647	$ 22,430	$ 23,903	$ 16,294	14,343	$ 14,938	$ 18,991	$ 17,214	95,274	65,486	65,975
Depreciation and amortization									63,637	56,663	53,083
Expenditures for property, plant & equipment									142,945	58,170	52,313
Segment assets	1,477,297				1,211,981				1,477,297	1,211,981
Equity investment	11,727				11,354				11,727	11,354
Goodwill	250,342				233,755				250,342	233,755	195,894
Eliminations
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Inter-segment revenues									(58,217)	(43,645)	(43,556)
II-VI Laser Solutions
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Goodwill	84,180				84,105				84,180	84,105	43,578
II-VI Laser Solutions | Operating Segments
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Revenues									339,341	303,002	287,881
Inter-segment revenues									33,792	24,290	21,021
Operating income									30,931	36,184	55,039
Depreciation and amortization									24,958	17,222	14,127
Expenditures for property, plant & equipment									82,760	25,620	27,349
Segment assets	589,239				469,754				589,239	469,754
Goodwill	84,180				84,105				84,180	84,105
II-VI Photonics
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Goodwill	113,272				96,760				113,272	96,760	99,426
II-VI Photonics | Operating Segments
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Revenues									418,515	325,879	260,825
Inter-segment revenues									14,236	12,081	13,210
Operating income									62,975	37,849	7,208
Depreciation and amortization									21,442	19,855	21,073
Expenditures for property, plant & equipment									27,397	21,096	11,324
Segment assets	578,315				467,486				578,315	467,486
Goodwill	113,272				96,760				113,272	96,760
II- VI Performance Products
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Goodwill	52,890				52,890				52,890	52,890	52,890
II- VI Performance Products | Operating Segments
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Revenues									214,190	198,335	193,255
Inter-segment revenues									10,189	7,274	9,325
Operating income									21,635	17,780	14,552
Depreciation and amortization									17,237	19,586	17,883
Expenditures for property, plant & equipment									32,788	11,454	$ 13,640
Segment assets	309,743				274,741				309,743	274,741
Equity investment	11,727				11,354				11,727	11,354
Goodwill	$ 52,890				$ 52,890				$ 52,890	$ 52,890

Geographical Information of Rev

Geographical Information of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 273,717	$ 244,987	$ 231,822	$ 221,520	$ 241,470	$ 205,105	$ 191,434	$ 189,207	$ 972,046	$ 827,216	$ 741,961
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									294,200	266,347	241,974
China
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									208,595	172,292	140,586
Hong Kong
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									190,702	140,821	109,428
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									88,304	72,070	77,524
Japan
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									76,212	57,287	52,864
Switzerland
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									50,497	54,760	56,940
Vietnam
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									22,497	24,267	24,307
Italy
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									10,791	10,160	9,313
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									8,473	8,154	7,749
Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									7,503	6,026	5,731
Korea
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									6,584	3,887
Singapore
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									3,913	3,039	3,897
Philippines
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									3,057	8,106	11,334
Taiwan
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									718
Australia
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues											314
Total Non-United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues									$ 677,846	$ 560,869	$ 499,987

Geographical Information of Lon

Geographical Information of Long Lived Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	$ 371,572	$ 258,914	$ 208,885
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	240,029	137,521	102,171
China
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	62,024	51,824	46,794
Switzerland
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	36,795	38,202	26,384
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	15,323	15,162	15,790
Vietnam
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	8,272	8,895	7,985
Philippines
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	6,115	4,399	6,003
Hong Kong
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	1,914	1,765	2,476
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	1,100	1,146	1,282
Total Non-United States
Revenues From External Customers And Long Lived Assets [Line Items]
Long-Lived Assets	$ 131,543	$ 121,393	$ 106,714

Fair Value of Financial Instr88

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Feb. 29, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Payment for earnout amount	$ 2,000
EpiWorks | Upon Achievement of Financial and Operational Targets For Capacity Wafer Output and Gross Margin | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisitions, contingent consideration		$ 6,000
IPI | Upon Achievement of Financial And Transitional Objectives Relating to Finance Information Technology And Human Resources | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business acquisitions, contingent consideration	$ 2,500

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 ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Assets:
Foreign currency forward contracts	$ 191
Liabilities:
Foreign currency forward contracts		$ 511
Contingent earnout arrangements	5,795	4,352
Fair Value, Inputs, Level 2
Assets:
Foreign currency forward contracts	191
Liabilities:
Foreign currency forward contracts		511
Fair Value, Inputs, Level 3
Liabilities:
Contingent earnout arrangements	$ 5,795	$ 4,352

Reconciliation of Beginning and

Reconciliation of Beginning and Ending Fair Value Measurements of Level Three Contingent Earnout Arrangement Related to Acquisition (Detail) - Fair Value, Inputs, Level 3 $ in Thousands	12 Months Ended
	Jun. 30, 2017USD ($)
EpiWorks and IPI
Business Acquisition Contingent Consideration [Line Items]
Balance - beginning of period	$ 4,352
Contingent earnout arrangements:
Payments	(2,000)
Balance - end of period	5,795
EpiWorks and IPI | Other Expense, (Income)
Contingent earnout arrangements:
Changes in fair value recorded in other expense, (income)	1,193
Integrated Photonics, Inc
Business Acquisition Contingent Consideration [Line Items]
Contingent earnout - IPI	$ 2,250

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017JPY (¥)	Jun. 30, 2016USD ($)
Minimum
Derivative [Line Items]
Foreign currency forward exchange contracts, expiration date	2017-07
Maximum
Derivative [Line Items]
Foreign currency forward exchange contracts, expiration date	2017-10
Foreign Currency Forward Exchange Contracts
Derivative [Line Items]
Foreign currency forward exchange contracts, notional amount | $	$ 12,700,000		$ 9,200,000
Foreign Currency Forward Exchange Contracts | Minimum
Derivative [Line Items]
Foreign currency forward exchange contracts, notional amount		¥ 300,000,000
Foreign Currency Forward Exchange Contracts | Maximum
Derivative [Line Items]
Foreign currency forward exchange contracts, notional amount		¥ 400,000,000

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Contributions to profit sharing retirement plan	$ 4,300	$ 3,400	$ 2,800
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	$ 2,432	2,043
Contributions to the Compensation Plan by the employer in fiscal year 2018	$ 2,600
Percentage of discretionary incentive compensation	100.00%
Contributions to the Compensation Plan by the employees	$ 800	1,200	700
II-VI Performance Metals Defined Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the Compensation Plan by the employer		$ 0	$ 0
II-VI Performance Metals Defined Benefit Plan | Dr. Mattera
Defined Benefit Plan Disclosure [Line Items]
Contributions to the Compensation Plan by the employer	$ 100
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	477,949	492,913

Schedule of Changes in Projecte

Schedule of Changes in Projected Benefit Obligations and Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Change in projected benefit obligation:
Projected benefit obligation, beginning of period	$ 54,094	$ 42,575
Service cost	3,689	2,680
Interest cost	163	434
Participant contributions	1,262	1,046
Benefits received	1,743	1,567
Actuarial (gain) loss on obligation	(2,777)	8,071
Currency translation adjustment	1,344	(2,279)
Projected benefit obligation, end of period	59,518	54,094	$ 42,575
Change in plan assets:
Plan assets at fair value, beginning of period	35,857	32,509
Actual return on plan assets	805	431
Employer contributions	2,432	2,043
Participant contributions	1,262	1,046
Benefits received	1,743	1,567
Currency translation adjustment	891	(1,739)
Plan assets at fair value, end of period	42,990	35,857	32,509
Other non-current assets:
Deferred tax asset	3,496	3,857
Other non-current liabilities:
Underfunded pension liability	16,528	18,237
Amounts recognized in accumulated other comprehensive income, net of tax:
Pension adjustment	(2,514)	7,031	$ 2,244
Accumulated benefit obligation, end of period	$ 56,457	$ 50,772

Schedule of Net Periodic Pensio

Schedule of Net Periodic Pension Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]
Service cost	$ 3,689	$ 2,680
Interest cost	163	434
Expected return on plan assets	(742)	(1,097)
Prior service cost	594	(234)
Net period pension cost	$ 3,704	$ 1,783

Schedule of Projected and Accum

Schedule of Projected and Accumulated Benefit Obligations Rates (Detail)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
Discount rate	0.80%	0.30%
Salary increase rate	2.00%	2.00%
Expected return on plan assets	2.00%	2.00%
Expected average remaining working life (in years)	9 years 10 months 25 days	10 years 2 months 12 days

Schedule of Swiss Plan's Asset

Schedule of Swiss Plan's Asset Allocation (Detail)	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	100.00%	100.00%
Fixed Income Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	10.00%	15.00%
Equity Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	52.00%	51.00%
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	26.00%	28.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	9.00%	3.00%
Alternative Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	3.00%	3.00%

Schedule of Estimated Future Be

Schedule of Estimated Future Benefit Payments Under Swiss Plan (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Defined Benefit Plan Estimated Future Benefit Payments [Abstract]
2,018	$ 2,683
2,019	4,062
2,020	1,575
2,021	2,533
2,022	2,681
Next five years	$ 19,163

Components of Other Accrued Lia

Components of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Schedule Of Accrued Liabilities [Line Items]
Other accrued liabilities	$ 29,056	$ 25,846
Deferred revenue
Schedule Of Accrued Liabilities [Line Items]
Other accrued liabilities	2,345	4,014
Current portion of earnout arrangements
Schedule Of Accrued Liabilities [Line Items]
Other accrued liabilities	3,930	1,935
Other accrued liabilities
Schedule Of Accrued Liabilities [Line Items]
Other accrued liabilities	18,235	15,989
Warranty reserve
Schedule Of Accrued Liabilities [Line Items]
Other accrued liabilities	$ 4,546	$ 3,908

Change in Carrying Value of Com

Change in Carrying Value of Company's Warranty Reserve (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2017USD ($)
Other Liabilities Disclosure [Abstract]
Balance-Beginning of Year	$ 3,908
Settlements during the period	(4,212)
Additional warranty liability recorded	4,850
Balance-End of Year	$ 4,546

Schedule of Future Commitments

Schedule of Future Commitments (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,018	$ 21,988
2,019	866
2,020	$ 578

Share Repurchase Programs (Deta

Share Repurchase Programs (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Aug. 31, 2014
Equity [Abstract]
Stock repurchase program, authorized amount				$ 50,000,000
Purchase of common stock, shares	0	380,538	936,049
Purchase of Treasury Stock		$ 6,284,000	$ 12,729,000

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income ("AOCI") by Component, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 782,338	$ 729,081	$ 675,043
Other comprehensive income (loss) before reclassifications	(355)	(22,456)	(10,741)
Amounts reclassified from AOCI	594	(226)
Net current-period other comprehensive income	239	(22,682)	(10,741)
Ending Balance	900,563	782,338	729,081
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(6,185)	9,466	17,963
Other comprehensive income (loss) before reclassifications	(2,275)	(15,651)	(8,497)
Net current-period other comprehensive income	(2,275)	(15,651)	(8,497)
Ending Balance	(8,460)	(6,185)	9,466
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(7,832)	(801)	1,443
Other comprehensive income (loss) before reclassifications	1,920	(6,805)	(2,244)
Amounts reclassified from AOCI	594	(226)
Net current-period other comprehensive income	2,514	(7,031)	(2,244)
Ending Balance	(5,318)	(7,832)	(801)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(14,017)	8,665	19,406
Ending Balance	$ (13,778)	$ (14,017)	$ 8,665

Capital Lease - Schedule of Fut

Capital Lease - Schedule of Future Minimum Lease Payments Due Under Non-Cancelable Capital Lease (Detail) $ in Thousands	Jun. 30, 2017USD ($)
Leases [Abstract]
2,018	$ 2,579
2,019	2,579
2,020	2,579
2,021	2,579
2,022	2,579
Thereafter	24,503
Total minimum lease payments	37,398
Less amount representing interest	12,909
Present value of capitalized payments	24,489
Less: current portion	1,074
Capital lease obligation	$ 23,415

Capital Lease - Additional Info

Capital Lease - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Capital Leased Assets [Line Items]
Capital leases future minimum payments present value at inception	$ 25,000
Property, plant and equipment estimated useful lives, years	15 years
Depreciation expense	$ 50,894	$ 44,324	$ 41,114
Capital Leased Asset
Capital Leased Assets [Line Items]
Depreciation expense	$ 800

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Kaim Laser Limited - Subsequent Event - United Kingdom $ in Millions	Jul. 26, 2017USD ($)
Subsequent Event [Line Items]
Percentage of outstanding stock acquired	100.00%
Acquisition price of shares	$ 80

Quarterly Financial Data (Detai

Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 273,717	$ 244,987	$ 231,822	$ 221,520	$ 241,470	$ 205,105	$ 191,434	$ 189,207	$ 972,046	$ 827,216	$ 741,961
Cost of goods sold	164,939	147,277	137,559	133,918	148,859	127,436	120,090	118,018	583,693	514,403	470,363
Internal research and development	25,966	25,380	23,632	21,832	20,102	14,946	12,155	13,151	96,810	60,354	51,260
Selling, general and administrative	47,137	43,291	43,495	42,079	43,595	43,333	37,408	36,310	176,002	160,646	143,539
Interest expense	2,262	1,936	1,365	1,246	1,066	769	597	649	6,809	3,081	3,863
Other expense (income), net	(445)	(2,164)	(6,045)	(1,402)	(429)	1,257	(994)	(1,057)	(10,056)	(1,223)	(6,176)
Earnings Before Income Taxes	33,858	29,267	31,816	23,847	28,277	17,364	22,178	22,136	118,788	89,955	79,112
Income taxes	1,211	6,837	7,913	7,553	13,934	2,426	3,187	4,922	23,514	24,469	13,137
Net Earnings	$ 32,647	$ 22,430	$ 23,903	$ 16,294	$ 14,343	$ 14,938	$ 18,991	$ 17,214	$ 95,274	$ 65,486	$ 65,975
Basic earnings per share	$ 0.52	$ 0.36	$ 0.38	$ 0.26	$ 0.23	$ 0.24	$ 0.31	$ 0.28	$ 1.52	$ 1.07	$ 1.08
Diluted earnings per share	$ 0.50	$ 0.35	$ 0.37	$ 0.26	$ 0.23	$ 0.24	$ 0.30	$ 0.27	$ 1.48	$ 1.04	$ 1.05

Valuation and Qualifying Acc107

Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Allowance for doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 2,016	$ 1,048	$ 1,852
Additions Charged to Expense		(134)	1,123	(482)
Deduction from Reserves	[1]	(568)	(155)	(322)
Balance at End of Year		1,314	2,016	1,048
Warranty reserve
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		3,908	3,251	2,859
Additions Charged to Expense		4,850	4,648	5,047
Additions Charged to Other Accounts	[2]		82
Deduction from Reserves		(4,212)	(4,073)	(4,655)
Balance at End of Year		4,546	3,908	3,251
Deferred tax asset valuation allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		42,641	2,713
Additions Charged to Expense		(79)	8,464
Additions Charged to Other Accounts	[3]		36,240
Deduction from Reserves	[4]		(4,776)
Balance at End of Year		$ 42,562	$ 42,641	$ 2,713
[1]	Primarily relates to write-offs of accounts receivable.
[2]	Relates to the warranty reserve acquired from the acquisitions.
[3]	Valuation allowance recorded through goodwill.
[4]	Reduction in valuation allowance as a result of divesture of portion of business.