Globe Specialty Metals 10-K 27 Aug 15 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Aug. 17, 2015	Dec. 31, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	GLOBE SPECIALTY METALS INC
Entity Central Index Key	1,383,571
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1,119.7
Entity Common Stock, Shares Outstanding		73,749,990
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2015

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 115,944	$ 97,792
Marketable securities	4,965	10,399
Accounts receivable, net of allowance for doubtful accounts of $778 and $811 at June 30, 2015 and 2014, respectively	54,815	100,829
Inventories	119,732	80,924
Deferred tax assets	6,385	7,042
Prepaid expenses and other current assets	20,501	26,259
Total current assets	322,342	323,245
Property, plant, and equipment, net of accumulated depreciation, depletion and amortization	454,769	469,169
Deferred tax assets	790	901
Goodwill	43,343	43,343
Other intangible assets	477	477
Investments in unconsolidated affiliates	5,973	5,973
Other assets	1,667	2,018
Total assets	829,361	845,126
Current liabilities:
Accounts payable	63,807	46,613
Short-term debt	953	59
Share-based liabilities	4,851	12,552
Accrued expenses and other current liabilities	43,687	38,758
Total current liabilities	113,298	97,982
Long-term liabilities:
Revolving credit agreements and other long-term debt	100,095	125,145
Deferred tax liabilities	50,861	50,845
Other long-term liabilities	52,605	50,626
Total liabilities	$ 316,859	$ 324,598
Commitments and contingencies (note 16)
Stockholders' equity:
Common stock, $0.0001 par value. Authorized, 150,000,000 shares; issued, 75,637,059 and 75,623,454 shares at June 30, 2015 and 2014, respectively	$ 8	$ 8
Additional paid-in capital	403,413	398,685
Retained earnings	79,332	70,875
Accumulated other comprehensive loss:
Foreign currency translation adjustment	(21,766)	(1,832)
Pension liability adjustment, net of tax	(5,399)	(3,689)
Unrealized (loss) gain on available for sale securities, net of tax	(711)	144
Total accumulated other comprehensive loss	(27,876)	(5,377)
Treasury stock at cost, 1,887,069 and 1,874,003 shares at June 30, 2015 and 2014, respectively	(29,208)	(28,966)
Total Globe Specialty Metals, Inc. stockholders' equity	425,669	435,225
Noncontrolling interest	86,833	85,303
Total stockholders' equity	512,502	520,528
Total liabilities and stockholders' equity	$ 829,361	$ 845,126

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
ASSETS
Allowance for doubtful accounts	$ 778	$ 811
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	75,637,059	75,623,454
Treasury stock at cost (in shares)	1,887,069	1,874,003

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Consolidated Statements of Operations [Abstract]
Net sales		$ 800,773	$ 752,817	$ 757,550
Cost of goods sold		650,677	635,735	657,911
Selling, general, and administrative expenses		88,205	92,103	64,663
Contract acquisition cost		0	16,000	0
Curtailment gain		0	(5,831)	0
Business interruption insurance recovery		0	0	(4,594)
Goodwill impairment		0	0	13,130
Impairment of long-lived assets		0	0	35,387
Operating income (loss)		61,891	14,810	(8,947)
Other income (expense):
Gain on remeasurement of equity investment		0	0	1,655
Bargain purchase gain		0	29,538	0
Interest income		267	67	820
Interest expense, net of capitalized interest	[1]	(4,343)	(8,022)	(6,887)
Foreign exchange loss		(2,669)	(3,121)	(4,360)
Other income		1,132	339	644
Income (loss) before provision for income taxes		56,278	33,611	(17,075)
Provision for income taxes		21,651	7,705	2,734
Net income (loss)		34,627	25,906	(19,809)
Income attributable to noncontrolling interest, net of tax		(3,307)	(4,203)	(1,219)
Net income (loss) attributable to Globe Specialty Metals, Inc.		$ 31,320	$ 21,703	$ (21,028)
Weighted average shares outstanding:
Basic (in shares)		73,751	74,674	75,207
Diluted (in shares)		73,892	74,793	75,207
Earnings (loss) per common share:
Basic (in dollars per share)		$ 0.42	$ 0.29	$ (0.28)
Diluted (in dollars per share)		0.42	0.29	(0.28)
Cash dividends declared per common share (in dollars per share)		$ 0.31	$ 0.29	$ 0.38
[1]	Net of capitalized interest.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 34,627	$ 25,906	$ (19,809)
Other comprehensive (loss) income
Foreign currency translation adjustment	(21,474)	(2,232)	(1,642)
Pension liability adjustment, net of tax (benefit) expense of ($735), $635, and $2,053, respectively	(1,947)	1,597	2,954
Unrealized (loss) gain on available for sale securities, net of tax (benefit) expense of ($300), $49, and $13, respectively	(855)	144	38
Total other comprehensive (loss) income	(24,276)	(491)	1,350
Comprehensive income (loss)	10,351	25,415	(18,459)
Comprehensive income attributable to noncontrolling interest	1,530	4,171	647
Comprehensive income (loss) attributable to Globe Specialty Metals, Inc.	$ 8,821	$ 21,244	$ (19,106)

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Pension liability adjustment [Member]
Other comprehensive (loss) income
Other comprehensive income (loss), tax (benefit) expense	$ (735)	$ 635	$ 2,053
Unrealized gain (loss) on available for sale securities [Member]
Other comprehensive (loss) income
Other comprehensive income (loss), tax (benefit) expense	$ (300)	$ 49	$ 13

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock at Cost [Member]	Noncontrolling Interest [Member]	Total
Balance at Jun. 30, 2012	$ 8	$ 405,675	$ 119,863	$ (6,840)	$ (4)	$ 85,097	$ 603,799
Balance (in shares) at Jun. 30, 2012	75,332,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 0	(5,525)	0	0	0	0	(5,525)
Share-based compensation (in shares)	2,000
Stock option exercises	$ 0	1,023	0	0	0	0	$ 1,023
Stock option exercises (in shares)	255,000						(583,333)
Yonvey shares purchased	$ 0	(1,939)	0	0	0	(1,510)	$ (3,449)
Quebec Silicon purchase price allocation adjustments	0	0	0	0	0	(3,102)	(3,102)
Cash dividend	0	0	(28,207)	0	0	0	(28,207)
Comprehensive income (loss)	0	0	(21,028)	1,922	0	647	(18,459)
Balance at Jun. 30, 2013	$ 8	399,234	70,628	(4,918)	(4)	81,132	546,080
Balance (in shares) at Jun. 30, 2013	75,589,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 0	(729)	0	0	0	0	(729)
Share-based compensation (in shares)	4,000
Stock option exercises	$ 0	180	0	0	0	0	180
Share repurchase	$ 0	0	0	0	(28,962)	0	$ (28,962)
Stock option exercises (in shares)	30,000						(45,521)
Cash dividend	$ 0	0	(21,456)	0	0	0	$ (21,456)
Comprehensive income (loss)	0	0	21,703	(459)	0	4,171	25,415
Balance at Jun. 30, 2014	$ 8	398,685	70,875	(5,377)	(28,966)	85,303	520,528
Balance (in shares) at Jun. 30, 2014	75,623,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	$ 0	4,648	0	0	0	0	4,648
Share-based compensation (in shares)	7,000
Stock option exercises	$ 0	80	0	0	0	0	80
Share repurchase	$ 0	0	0	0	(242)	0	$ (242)
Stock option exercises (in shares)	7,000						(56,990)
Cash dividend	$ 0	0	(22,863)	0	0	0	$ (22,863)
Comprehensive income (loss)	0	0	31,320	(22,499)	0	1,530	10,351
Balance at Jun. 30, 2015	$ 8	$ 403,413	$ 79,332	$ (27,876)	$ (29,208)	$ 86,833	$ 512,502
Balance (in shares) at Jun. 30, 2015	75,637,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ 34,627	$ 25,906	$ (19,809)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,029	43,822	45,108
Depletion	752	1,151	1,513
Share-based compensation	4,648	(729)	(5,525)
Curtailment gain	0	(5,831)	0
Bargain purchase gain	0	(29,538)	0
Gain on remeasurement of equity investment	0	0	(1,655)
Goodwill impairment	0	0	13,130
Impairment of long-lived assets	0	0	35,387
Amortization of deferred financing fees	191	3,668	812
Unrealized foreign exchange loss	183	373	1,635
Deferred taxes	4,117	3,731	(3,541)
Amortization of customer contract liabilities	(3,727)	(7,183)	(6,626)
Accretion	225	255	267
Changes in operating assets and liabilities:
Accounts receivable, net	43,309	(16,673)	3,513
Inventories	(45,000)	21,973	16,588
Prepaid expenses and other current assets	1,798	4,074	(4,533)
Accounts payable	15,116	7,251	(14,161)
Accrued expenses and other current liabilities	(486)	6,080	10,565
Other	2,467	4,226	72
Net cash provided by operating activities	109,249	62,556	72,740
Cash flows from investing activities:
Capital expenditures	(50,019)	(47,075)	(44,509)
Acquisition of businesses, net of cash acquired of $0, $200, and $3,656 during the years ended June 30, 2015, 2014, and 2013, respectively	0	(3,800)	(4,520)
Proceeds from sale (purchase) of marketable securities	7,776	(13,396)	0
Net cash used in investing activities	(42,243)	(64,271)	(49,029)
Cash flows from financing activities:
Borrowings of long-term debt	894	145	0
Payments of short-term debt	(50)	(225)	(39)
Borrowings under revolving credit agreements	0	156,400	20,391
Payments under revolving credit agreements	(25,000)	(170,650)	(21,616)
Debt issuance costs	0	(1,080)	0
Dividend payments	(22,863)	(21,456)	(28,207)
Proceeds from stock option exercises	80	180	1,023
Purchase of treasury shares	(242)	(28,962)	0
Other financing activities	(2,572)	(2,960)	(2,546)
Net cash used in financing activities	(49,753)	(68,608)	(30,994)
Effect of exchange rate changes on cash and cash equivalents	899	(1,561)	(1,051)
Net increase (decrease) in cash and cash equivalents	18,152	(71,884)	(8,334)
Cash and cash equivalents at beginning of year	97,792	169,676	178,010
Cash and cash equivalents at end of year	115,944	97,792	169,676
Supplemental disclosures of cash flow information:
Cash paid for interest, net of capitalized interest	1,855	3,938	5,492
Cash paid (refunded) for income taxes, net of refunds totaling $554, $8,708, and $626 during the years ended June 30, 2015, 2014, and 2013, respectively	$ 11,513	$ (6,212)	$ 13,303

Consolidated Statements of Cas9

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Cash flows from investing activities:
Net cash acquired for acquisition of a business	$ 0	$ 200	$ 3,656
Supplemental disclosures of cash flow information:
Refunds for income taxes	$ 554	$ 8,708	$ 626

Organization and Business Opera

Organization and Business Operations	12 Months Ended
	Jun. 30, 2015
Organization and Business Operations [Abstract]
Organization and Business Operations	(1) Organization and Business Operations Globe Specialty Metals, Inc. and subsidiaries (GSM, the Company, we, or our) is among the world’s largest producers of silicon metal and silicon-based alloys, important ingredients in a variety of industrial and consumer products. The Company’s customers include major silicone chemical, aluminum and steel manufacturers, auto companies and their suppliers, ductile iron foundries, manufacturers of photovoltaic solar cells and computer chips, and concrete producers. On November 13, 2006, the Company acquired Globe Metallurgical, Inc. (GMI), a manufacturer of silicon metal and silicon-based alloys. GMI owns and operates plants in Beverly, Ohio, Alloy, West Virginia, Niagara Falls, New York, and Selma, Alabama. GMI’s products are sold primarily to the silicone chemical, aluminum, metal casting, and solar cell industries, primarily in the United States, Canada, and Mexico. GMI also owns Norchem, Inc. (Norchem). Norchem manufactures and sells additives that enhance the durability of concrete, refractory material, and oil well conditioners. GMI sells silica fume (also known as microsilica), a by-product of its ferrosilicon metal and silicon metal production process, to Norchem, as well as other companies. On November 20, 2006, the Company acquired Stein Ferroaleaciones S.A. (SFA), an Argentine manufacturer of silicon-based alloys, and SFA’s affiliate, UltraCore Polska Sp.z.o.o. (UCP), a Polish manufacturer of cored wire alloys. SFA was renamed Globe Metales S.A. (Globe Metales). Globe Metales is headquartered in Buenos Aires, Argentina and operates a silicon-based alloy manufacturing plant in Mendoza province, Argentina and a cored wire packing plant in Police, Poland. Globe Metales’ products are important ingredients in the manufacturing of steel, ductile iron, machine and auto parts, and pipe. On January 31, 2007, the Company acquired Camargo Correa Metais S.A. (CCM), one of Brazil’s largest producers of silicon metal and silica fume. CCM was renamed Globe Metais Indústria e Comércio S.A. (Globe Metais). On November 5, 2009, the Company sold 100% of its interest in Globe Metais. The sale of the Company’s equity interest in Globe Metais was executed in connection with the sale of a 49% membership interest in WVA Manufacturing, LLC (WVA LLC), a newly formed entity by the Company, to Dow Corning Corporation (Dow Corning). On February 29, 2008, the Company completed the acquisition of approximately 81% of Solsil, Inc. (Solsil). Solsil is continuing to develop its technology to produce upgraded metallurgical grade silicon through a proprietary metallurgical process for use in photovoltaic (solar) cells. Solsil is not presently producing material for commercial sale. The Company owns 97.25% of Solsil. On May 15, 2008, the Company purchased an ownership interest of approximately 58% of Ningxia Yonvey Coal Industrial Co., Ltd (Yonvey). Yonvey is a producer of carbon electrodes, an important input in the silicon metal production process. Yonvey now principally supplies its electrodes to our subsidiaries. Yonvey’s operations are located in Chonggang Industrial Park, Shizuishan in the Ningxia Hui Autonomous Region of China. On November 28, 2008, the Company increased its interest by an additional 12%. In January 2013, the Company purchased an additional 28% ownership interest in Yonvey, bringing the Company’s ownership interest in Yonvey to 98%. On April 1, 2010, the Company acquired Core Metals Group Holdings LLC (Core Metals). Core Metals is a leading producer, marketer, and distributor of ferroalloys and specialty materials for the North American steel and foundry industry. On July 28, 2011, the Company acquired Alden Resources, LLC (Alden) and Gatliff Services, LLC (Gatliff), collectively known as Alden. Alden is North America’s leading miner, processor and supplier of specialty metallurgical coal to the silicon and silicon-based alloy industries. The acquisition was made in order to secure a stable, long-term and low-cost supply of specialty metallurgical coal, a key ingredient in the production of silicon metal and silicon-based alloys. On June 13, 2012, the Company acquired Becancour Silicon Metal Inc.'s (BSI) 51% equity interest in Quebec Silicon Limited Partnership (QSLP), collectively known as Quebec Silicon. The Company operates Quebec Silicon’s silicon metal plant located in Becancour, Quebec with its joint venture partner Dow Corning. On November 21, 2013, the Company purchased 100% of the outstanding shares of Silicon Technology (Pty) Ltd. (Siltech). Siltech is a silicon-based alloy producer in South Africa. The acquisition was made to increase the Company’s current silicon-based alloy capacity. See note 3 (Business Combinations) for additional information regarding business combinations. Proposed Business Combination On February 23, 2015, the Company, Grupo Villar Mir, S.A.U., a public limited company (sociedad anónima) incorporated under the laws of Spain (“Grupo VM”), Grupo FerroAtlántica, S.A.U., a Spanish public limited liability company in the form of a sociedad anónima and wholly owned subsidiary of Grupo VM (“FerroAtlántica”), VeloNewco Limited, a newly formed private UK holding company and wholly owned subsidiary of Grupo VM (“VeloNewco”), and Gordon Merger Sub, Inc., a newly formed Delaware corporation and a direct wholly owned subsidiary of VeloNewco (“Merger Sub”), entered into a Business Combination Agreement (the “Original Business Combination Agreement”) pursuant to which the parties agreed, subject to the terms and conditions of the Original Business Combination Agreement, to combine the businesses of the Company and FerroAtlántica under VeloNewco as described below (the “Business Combination”). The Original Business Combination Agreement was amended and restated on May 5, 2015. The Original Business Combination Agreement, as so amended and restated, is referred to as the “Business Combination Agreement”. Transaction Overview Subject to the terms and conditions of the Business Combination Agreement, VeloNewco agreed to acquire from Grupo VM all of the issued and outstanding ordinary shares of FerroAtlántica in exchange for an aggregate of 98,078,161 newly issued VeloNewco Class A ordinary shares (each an “A Ordinary Share”), which will result in FerroAtlántica becoming a wholly owned subsidiary of VeloNewco (the “Stock Exchange”). After consummation of the Stock Exchange, Merger Sub will merge with and into the Company, with the Company surviving the merger as a wholly owned subsidiary of VeloNewco (the “Merger”). In the Stock Exchange, Grupo VM may be required to pay to VeloNewco as additional consideration for the A Ordinary Shares an amount in cash, if any, based upon FerroAtlántica’s net debt at closing. In the Merger, each share of common stock of the Company will be converted into the right to receive one VeloNewco ordinary share (each an “Ordinary Share”). The A Ordinary Shares and the Ordinary Shares will have the same rights, powers and preferences, and vote together as a single class, except for the right of the holders of Ordinary Shares to the R&W Proceeds as described below. In connection with the transaction, VeloNewco expects to purchase a buy side representations and warranties insurance policy (the “R&W Policy”) to insure against certain breaches of certain representations and warranties made by FerroAtlántica and Grupo VM in the Business Combination Agreement. Under the terms of the Articles of Association of VeloNewco (the “VeloNewco Articles”), if VeloNewco receives proceeds under the R&W Policy (after deduction of taxes applicable to such proceeds, if any) (the “R&W Proceeds”), VeloNewco is required to distribute the aggregate R&W Proceeds to the holders of the Ordinary Shares. Each A Ordinary Share automatically converts into one Ordinary Share upon the earlier to occur of: (a) the expiration of the R&W Policy; and (b) its transfer to any person or group which is not Grupo VM, any Grupo VM family member or any affiliate of Grupo VM or a Grupo VM family member. Completion of the Business Combination is subject to Globe shareholder approval, regulatory approvals and customary closing conditions. The special meeting of Globe shareholders to consider adoption of the business combination agreement is scheduled for Thursday, September 10, 2015.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2015
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(2) Summary of Significant Accounting Policies a. Basis of Presentation and Principles of Consolidation The Company’s consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and present the accounts of Globe Specialty Metals, Inc. and its consolidated subsidiaries. When the Company does not have a controlling interest in an entity, but exerts significant influence over the entity, the Company applies the equity method of accounting. For investments in which the Company does not have significant influence, the cost method of accounting is used. All intercompany balances and transactions have been eliminated in consolidation. b. Use of Estimates The Company prepares its consolidated financial statements in accordance with U.S. GAAP. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosure of contingent assets and liabilities. The Company based its estimates and judgments on historical experience, known or expected trends and other factors that are believed to be reasonable under the circumstances. Actual results may differ from these estimates. c. Revenue Recognition Revenue is recognized when title, ownership, and risk of loss pass to the customer, all of which occurs when products are delivered to the Company’s customers or when products are picked up by a customer or a customer’s carrier. Written sales terms, including the selling price, are determined at the time of shipment or delivery. We have not experienced significant credit issues with our customers. d. Foreign Currency Translation The determination of the functional currency for the Company’s subsidiaries is made based on appropriate economic factors, including the currency in which the subsidiary sells its products, the market in which the subsidiary operates, and the currency in which the subsidiary’s financing is denominated. Based on these factors, management has determined that the U.S. dollar is the functional currency for Globe Metales. The functional currency for Yonvey is the Chinese renminbi. Yonvey’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. The functional currency for Quebec Silicon is the Canadian dollar. Quebec Silicon’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. The functional currency for Siltech is the South African rand. Siltech’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. Resulting translation adjustments are reported as a separate component of stockholders’ equity. Translation gains and losses are recognized on transactions in currencies other than the subsidiary’s functional currency and included in the consolidated statement of operations for the period in which the exchange rates changed. e. Cash and Cash Equivalents Cash equivalents consist of highly liquid investments that are readily convertible into cash. Securities with contractual maturities of three months or less, when purchased, are cash equivalents. The carrying amount of these securities approximates fair value because of the short-term maturity of these instruments. f. Receivables Sale Arrangement The Company has the option to sell certain accounts receivables up to a cap of $35,000 on a non-recourse basis to an unrelated financial institution under a receivables purchase arrangement in the U.S. An amendment to the agreement was entered into in the fourth quarter which raised the cap to $55,000. The Company accounts for this transaction as a sale of receivables, removes receivables sold from its financial statements, and records cash proceeds when received by the Company as cash provided by operating activities in the Consolidated Statement of Cash Flows. The receivables are sold at a discount rate of 30 day LIBOR plus 1.25% per annum discounted upfront on the date of purchase. The Company entered into the arrangement in the second quarter of fiscal 2015. The arrangement has a term of twelve months and will be renewed for an additional twelve month period in the absence of written termination notice provided by the Company no later than sixty days prior to the termination date of the arrangement. During fiscal 2015, the Company sold $175,592 of receivables under the arrangement and as of June 30, 2015, $46,567 of receivables was outstanding with the financial institution. g. Marketable Securities Marketable securities consist of trading and available-for-sale securities. Trading securities are bought and held principally for the purpose of selling them in the near term. Available-for-sale securities are not classified as either trading securities or as held-to-maturity securities. Unrealized holding gains and losses for trading securities are included in earnings. Unrealized holding gains and losses for available-for-sale securities are excluded from earnings and reported in other comprehensive income until realized. h. Inventories Cost of inventories is determined by the first-in, first-out method or, in certain cases, by the average cost method. Inventories are valued at the lower of cost or market value. Circumstances may arise (e.g., reductions in market pricing, obsolete, slow moving or defective inventory) that require the carrying amount of our inventory to be written down to net realizable value. The Company estimates market and net realizable value based on current and future expected selling prices, as well as expected costs to complete, including utilization of parts and supplies in the manufacturing process. i. Property, Plant, and Equipment Property, plant, and equipment are recorded at cost. Depreciation is calculated using the straight-line method based on the estimated useful lives of assets. The estimated useful lives of property, plant, and equipment are as follows: Range of Useful Lives Asset Type: Land improvements and land use rights 20 to 36 years Buildings 35 to 40 years Manufacturing equipment 5 to 25 years Furnaces 10 to 20 years Other 2 to 10 years Costs that do not extend the life of an asset, materially add to its value, or adapt the asset to a new or different use are considered repair and maintenance costs and expensed as incurred. Costs for mineral properties, which are incurred to expand capacity of operating mines, are capitalized and charged to operations based on the units-of production method over the estimated proven and probable reserve tons and based on the average useful life of the mine, respectively. Mine development costs include costs incurred for site preparation and development of the mines during the development stage, and are charged to operations on a straight-line basis over the estimated operational life of the mine. j. Business Combinations When the Company acquires a business, the purchase price is allocated based on the fair value of tangible assets and identifiable intangible assets acquired, and liabilities assumed. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Goodwill as of the acquisition date is measured as the residual of the excess of the consideration transferred, plus the fair value of any noncontrolling interest in the acquiree at the acquisition date, over the fair value of the identifiable net assets acquired. If the fair value of the net assets acquired exceeds the purchase price, the resulting bargain purchase is recognized as a gain in the consolidated statement of operations. Prior to the adoption of ASC Subtopic 805-10, Business Combinations k. Goodwill and Other Intangible Assets Impairment testing for goodwill is performed at the reporting unit level. In accordance with ASC Topic 350, Intangibles — Goodwill and Other Impairment is the condition that exists when the carrying amount of goodwill exceeds its implied fair value. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. The excess of the fair value of a reporting unit over the amounts assigned to its assets and liabilities is the implied fair value of goodwill. An impairment loss would be recognized when the carrying amount of goodwill exceeds the implied fair value of goodwill of the reporting unit. Refer to note 3 (Business Combinations) and note 7 (Goodwill and Other Intangibles) for additional information. Trade names have indefinite lives and are not amortized but rather tested annually for impairment and written down to fair value as required. l. Impairment of Long-Lived Assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Impairment losses are recorded on long-lived assets used in operations when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amounts. The impairment loss is measured by comparing the fair value of the asset to its carrying amount. The Company considers various factors in determining whether an impairment test is necessary, including among other things, a significant or prolonged deterioration in operating results and projected cash flows, significant changes in the extent or manner in which assets are used, technological advances with respect to assets which would potentially render them obsolete, our strategy and capital planning, and the economic climate in the markets we serve. When estimating future cash flows and if necessary, fair value, the Company makes judgments as to the expected utilization of assets and estimated future cash flows related to those assets, considering historical and anticipated future results, general economic and market conditions, the impact of planned business and operational strategies and other information available at the time the estimates are made. m. Mineral Reserves Mineral reserves are recorded at fair value at the date of acquisition. Depletion of mineral reserves is computed using the units-of-production method utilizing only proven and probable reserves (as adjusted for recoverability factors) in the depletion base. Mineral reserves are included in Property, plant and equipment, net of accumulated depreciation, depletion and amortization in the consolidated balance sheets. n. Exploration Costs Costs incurred to maintain current production capacity at a mine and exploration expenditures are charged to operating costs as incurred, including costs related to drilling and study costs incurred. o. Share-Based Compensation The Company recognizes share-based compensation expense based on the estimated grant date fair value of share-based awards using a Black-Scholes option pricing model. Prior to vesting, cumulative compensation cost equals the proportionate amount of the award earned to date. The Company has elected to treat each award as a single award and recognize compensation cost on a straight-line basis over the requisite service period of the entire award. If the terms of an award are modified in a manner that affects both the fair value and vesting of the award, the total amount of remaining unrecognized compensation cost (based on the grant-date fair value) and the incremental fair value of the modified award are recognized over the amended vesting period. On August 17, 2013, the Company amended certain outstanding options pursuant to the Company’s 2006 Employee, Director and Consultant Stock Plan, to permit these options alternatively to be settled for cash or exercised for the issuance of shares, at the election of the option holder. This modification changed its classification from equity awards to liability awards and the fair value of the liability awards is remeasured at the end of each reporting period through settlement. Refer to note 19 (Share-Based Compensation) for further information on the Company’s accounting for share-based compensation. p. Income Taxes The Company’s deferred tax assets and liabilities are determined based on temporary differences between financial reporting and tax bases of assets and liabilities, and applying enacted tax rates expected to be in effect for the year in which the differences are expected to reverse. If management determines it is more-likely-than-not that a portion of the Company’s deferred tax assets will not be realized, a valuation allowance is recorded. The provision for income taxes is based on domestic (including federal and state) and international statutory income tax rates in the tax jurisdictions where the Company operates, permanent differences between financial reporting and tax reporting, and available credits and incentives. Significant judgment is required in determining income tax provisions and tax positions. The Company may be challenged upon review by the applicable taxing authorities, and positions taken may not be sustained. All, or a portion of, the benefit of income tax positions are recognized only when the Company has made a determination that it is more-likely-than-not that the tax position will be sustained based upon the technical merits of the position. For tax positions that are determined as more-likely-than-not to be sustained, the tax benefit recognized is the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The accounting for uncertain income tax positions requires consideration of timing and judgments about tax issues and potential outcomes, and is a subjective estimate. In certain circumstances, the ultimate outcome of exposures and risks involves significant uncertainties. If actual outcomes differ materially from these estimates, they could have a material impact on the Company’s results of operations and financial condition. Interest and penalties related to uncertain tax positions are recognized in income tax expense. q. Financial Instruments The Company accounts for derivatives and hedging activities in accordance with ASC Topic 815, Derivatives and Hedging r. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board issued a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt this new guidance and management is currently evaluating which transition approach to use. In July 2015, the FASB deferred the required implementation date one year to the first quarter of calendar 2018 but also agreed to allow companies to adopt the standard at the original effective date of 2017. Accordingly, we will adopt this new guidance beginning in fiscal 2019. We are currently evaluating the impact of this guidance on our consolidated results of operations, financial position and cash flows. In April 2015, the FASB issued an accounting standards update relating to the presentation of debt issuance costs. The accounting update requires companies to present debt issuance costs related to a recognized debt liability presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The guidance is effective beginning fiscal 2017. In June 2015, the SEC clarified that revolver arrangement costs are not in the scope of the new guidance. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In July 2015, the FASB issued an accounting standards update relating to the measurement of inventory. The accounting update changes the subsequent measurement guidance from the lower of cost or market to the lower of cost and net realizable value for inventory measured using first-in, first-out (FIFO) or average cost. The guidance is effective beginning fiscal 2018. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

Business Combinations

Business Combinations	12 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Business Combinations	(3) Business Combinations Step Acquisition: On December 20, 2012, the Company closed its stock purchase of the remaining 50% interest in an existing equity investment. The total purchase price was $5,000, of which $4,500 was financed using cash on hand and the remaining $500 was subject to the finalization of the working capital settlement. The Company recognized a gain of approximately $1,655 on the fair value remeasurement (based on the transaction price) of its existing 50% equity investment. The Company finalized the purchase price allocation in December 2013. Total goodwill of $3,371 was recorded in connection with the acquisition, which was assigned to the GMI operating segment. Siltech: On November 21, 2013, the Company purchased 100% of the outstanding shares of Silicon Technology (Pty) Ltd. (Siltech) for $4,000. The Company paid for the acquisition from available cash. Siltech is a silicon-based alloy producer in South Africa with an annual production capacity of approximately 45,000 metric tons. The acquisition was made to increase the Company’s current silicon-based alloy capacity by approximately 30% and its strategic location will enable the Company to supplement its existing facility to service the large and improving European, Asian and Middle Eastern markets. The Siltech acquisition was recorded as a business combination under Accounting Standards Codification 805 (“ASC 805”), Business Combinations Based on the final purchase price allocation, the fair value of the identifiable net assets acquired of $33,538 exceeded the purchase price of $4,000, resulting in a gain on bargain purchase of $29,538. The purchase price of $4,000 was allocated as follows: Amounts Recognized as of Acquisition Date Assets Current assets $ 2,399 Property, plant and equipment 46,267 Total assets acquired $ 48,666 Liabilities Accounts payable $ 423 Accrued expenses 206 Deferred tax liabilities 13,346 Other long-term liabilities 1,153 Total liabilities assumed $ 15,128 Net assets acquired 33,538 Consideration paid 4,000 Gain on bargain purchase $ 29,538 ASC 805 requires that when the fair value of the net assets acquired exceeds the purchase price, resulting in a bargain purchase of a business, the acquirer must reassess the reasonableness of the values assigned to all of the net assets acquired, liabilities assumed and consideration transferred. The Company performed such reassessment and concluded that the values assigned for the Siltech acquisition are reasonable. The gain on bargain purchase was primarily attributable to the fact that Siltech was considered an ancillary business to the seller (Siltech being the seller’s only silicon-based alloys operation), coupled with the previous weaker silicon-based alloys pricing in the marketplace driven by end-user demand (which resulted in the idling of the facility by the seller in 2012). The results of the acquired business are included within the Other operating segment. Pro forma results of operations and other disclosures for the Siltech acquisition have not been presented as they are not material in relation to the Company’s reported results.

Inventories

Inventories	12 Months Ended
	Jun. 30, 2015
Inventories [Abstract]
Inventories	(4) Inventories Inventories comprise the following at June 30: 2015 2014 Finished goods $ 46,793 27,406 Work in process 5,120 5,120 Raw materials 53,105 33,843 Parts and supplies 14,714 14,555 Total $ 119,732 80,924 At June 30, 2015, $107,992 in inventory is valued using the first-in, first-out method and $11,740 using the average cost method. At June 30, 2014, $73,894 in inventory is valued using the first-in, first-out method and $7,030 using the average cost method. During the year ended June 30, 2015, the Company recorded inventory write-downs totaling $1,109. During the year ended June 30, 2014, the Company did not record any inventory write-downs. During the year ended June 30, 2013, the Company recorded inventory write-downs totaling $1,922 due to expected lower net realizable values for certain Solsil inventories. These write-downs were recorded in cost of goods sold.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Jun. 30, 2015
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid Expenses and Other Current Assets	(5) Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets comprise the following at June 30: 2015 2014 Value added and other non-income tax receivables $ 5,965 3,376 Income tax receivables 2,522 6,786 Bond trade settlement receivable — 4,163 Other 12,014 11,934 Total $ 20,501 26,259

Property, Plant, and Equipment

Property, Plant, and Equipment	12 Months Ended
	Jun. 30, 2015
Property, Plant, and Equipment [Abstract]
Property, Plant, and Equipment	(6) Property, Plant, and Equipment Property, plant, and equipment, net is comprised of the following at June 30: 2015 2014 Land, land improvements, and land use rights $ 12,530 13,615 Buildings and improvements 97,167 89,222 Machinery and equipment 241,949 217,358 Furnaces 228,423 208,368 Mineral reserves 55,843 55,843 Mine development 10,291 9,317 Other 22,483 14,712 Construction in progress 12,887 53,753 Property, plant, and equipment, gross 681,573 662,188 Less accumulated depreciation, depletion and amortization (226,804) (193,019) Property, plant, and equipment, net $ 454,769 469,169 Depreciation, depletion and amortization expense for the year ended June 30, 2015 was $51,781, of which $50,794 is recorded in cost of goods sold and $987 is recorded in selling, general, and administrative expenses, respectively. Depreciation, depletion and amortization expense for the year ended June 30, 2014 was $44,973, of which $43,902 is recorded in cost of goods sold and $1,071 is recorded in selling, general, and administrative expenses, respectively. Depreciation, depletion and amortization expense for the year ended June 30, 2013 was $46,621, of which $45,543 is recorded in cost of goods sold and $1,078 is recorded in selling, general, and administrative expenses, respectively. Capitalized interest for the years ended June 30, 2015, 2014, and 2013 was $0, $103, and $9, respectively. Mineral reserves are recorded at fair value at the date of acquisition. Mineral reserves are included in “Property, plant and equipment, net of accumulated depreciation, depletion and amortization” on the condensed consolidated balance sheets.

Goodwill and Other Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Jun. 30, 2015
Goodwill and Other Intangibles [Abstract]
Goodwill and Other Intangibles	(7) Goodwill and Other Intangibles Goodwill and other intangibles presented below have been allocated to the Company’s operating segments. a. Goodwill Changes in the carrying amount of goodwill, by reportable segment, during the years ended June 30 are as follows: Globe GMI Metales Solsil Other Total Balance at June 30, 2013 Goodwill $ 34,734 14,313 57,656 7,260 113,963 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) 34,734 8,313 — 130 43,177 Goodwill impairment — — — — — Purchase price allocation adjustments 166 — — — 166 Step acquisition — — — — — Foreign exchange rate changes — — — — — Balance at June 30, 2014 Goodwill 34,900 14,313 57,656 7,260 114,129 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) 34,900 8,313 — 130 43,343 Goodwill impairment — — — — — Purchase price allocation adjustments — — — — — Step acquisition — — — — — Foreign exchange rate changes — — — — — Balance at June 30, 2015 Goodwill 34,900 14,313 57,656 7,260 114,129 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) $ 34,900 8,313 — 130 43,343 b. Other Intangible Assets There were no changes in the value of the Company’s indefinite lived intangible assets during the years ended June 30, 2015 or 2014. The trade name balance is $477 at June 30, 2015 and 2014. c. Annual Impairment Tests The Company performed its annual goodwill and indefinite-lived intangible asset tests as of February 28, 2015. In accordance with ASC Topic 350, Intangibles – Goodwill and Other For the year ended June 30, 2015, all reporting units had fair values that exceeded carrying values and an impairment charge was not required. Yonvey Goodwill During the year ended June 30, 2013, the Company recognized an impairment charge to write-off goodwill associated with its electrode business in China (Yonvey) as a result of delays in the Company’s ability to develop a new production method that caused it to revise its expected future cash flows. In estimating the fair value of Yonvey, the Company considered cash flow projections using assumptions about, among other things, overall market conditions and successful cost rationalization initiatives (principally through the development of new production methods that will enable sustainable quality and pricing). The Company made a downward revision in the forecasted cash flows from its Yonvey reporting unit which resulted in an impairment of the entire goodwill balance of approximately $7,775 (impairment charge of $7,130, net of adjustments for foreign exchange rate changes). The impairment charge is recorded within the Other reporting segment. Metales Goodwill During the year ended June 30, 2013, in connection with our annual goodwill impairment test, the Company recognized an impairment charge of $6,000 related to the partial impairment of goodwill at its silicon-based alloy business in Argentina (Metales) resulting from sustained sales price declines that caused the Company to revise its expected future cash flows. The impairment charge is recorded within the Metales reporting segment. Fair value was estimated based on discounted cash flows and market multiples. Estimates under the Company’s discounted income based approach involve numerous variables including anticipated sales price and volumes, cost structure, discount rates and long term growth that are subject to change as business conditions change, and therefore could impact fair values in the future. The remaining goodwill is $8,313 as of June 30, 2015.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets	12 Months Ended
	Jun. 30, 2015
Impairment of Long-Lived Assets [Abstract]
Impairment of Long-Lived Assets	(8) Impairment of Long-Lived Assets In accordance with ASC Topic 360, Property, Plant and Equipment No impairment charges were recorded during the year ended June 30, 2015. Solsil Long-Lived Assets In recent years, Solsil has been focused on research and development projects and was not producing material for commercial sale. Although the Company expected to expand operations through the construction of new facilities using new technologies, the falling prices of polysilicon make further research and development pursuits commercially not viable. During the year ended June 30, 2013, the Company recognized an impairment charge of $18,452 to write-off equipment related to Solsil as a result of its decision to indefinitely take these assets out of service which was done, in response to sustained pricing declines that have rendered its production methods uneconomical. The amount of the impairment charge was determined by comparing the estimated fair value of the assets using an in-exchange premise (assumed to be zero) to their carrying amount. The impairment is recorded within the Solsil reporting segment. Nigeria Exploration Licenses In 2011, the Company acquired exploration licenses related to certain mines located in Nigeria, which granted it the right to explore for, among other things, manganese ore, a raw material used in the production of certain silicon and manganese based alloys. During the year ended June 30, 2013, based upon difficulties encountered in gaining secure access to the mines, the Company determined that exploration of these mines is not feasible and decided to abandon its plan to conduct exploration activities. Accordingly, the Company recognized an impairment charge of $16,935 (representing the aggregate carrying amount of the licenses). The impairment has been recorded to the Corporate segment.

Investments in Unconsolidated A

Investments in Unconsolidated Affiliates	12 Months Ended
	Jun. 30, 2015
Investments in Unconsolidated Affiliates [Abstract]
Investments in Unconsolidated Affiliates	(9) Investments in Unconsolidated Affiliates Investments in unconsolidated affiliates comprise the following at June 30: Ownership Interest 2015 2014 Inversora Nihuiles S.A.(a) 9.75% $ 3,067 3,067 Inversora Diamante S.A.(b) 8.40% 2,906 2,906 Total $ 5,973 5,973 (a) This entity owns a 51% interest in Hidroelectrica Los Nihuiles S.A., which is a hydroelectric company in Argentina. (b) This entity owns a 59% interest in Hidroelectrica Diamante S.A., which is a hydroelectric company in Argentina.

Debt

Debt	12 Months Ended
	Jun. 30, 2015
Debt [Abstract]
Debt	(10) Debt a. Short-Term Debt Short-term debt comprises the following: Weighted Outstanding Average Unused Balance Interest Rate Credit Line June 30, 2015: Type debt: Export financing $ 891 7.52% $ 2,989 Other 62 12.42% — Total $ 953 $ 2,989 June 30, 2014: Type debt: Export financing $ — NA $ 9,208 Other 59 14.47% — Total $ 59 $ 9,208 Export Financing Agreements b. Revolving Credit Agreements A summary of the Company’s revolving credit agreements at June 30, 2015 is as follows: Weighted Outstanding Average Unused Total Balance Interest Rate Commitment Commitment Revolving multi-currency credit facility $ 100,000 1.66% $ 198,978 300,000 Revolving credit agreement — 5.00% 12,025 12,025 On August 20, 2013, the Company entered into a $300,000 five-year revolving multi-currency credit facility, which includes a $10,000 sublimit for swing line loans and a $25,000 sublimit letter of credit facility. The credit facility refinanced existing debt under the revolving multi-currency credit agreement dated May 31, 2012 and closing costs. As a result of refinancing the previous credit facility, $3,354 of deferred financing costs were expensed in the year ended June 30, 2014. The current credit facility provides up to an additional $198,978 of borrowing capacity as of June 30, 2015. At the Company’s election, the credit facility may be increased by an amount up to $150,000 in the aggregate; such increase may be in the form of term loans or increases in the revolving credit line, subject to lender commitments and certain conditions as described in the credit agreement. The agreement contains provisions for adding domestic and foreign subsidiaries of the Company as additional borrowers under the credit facility. The agreement terminates on August 20, 2018 and requires no scheduled prepayments before that date. The Company classifies borrowings under this credit facility as long-term liabilities. Interest on borrowings under the multi-currency credit facility is payable, at the Company’s election, at either (a) a base rate (the higher of (i) the U.S. federal funds rate plus 0.50% per annum, (ii) the Administrative Agent’s prime rate or (iii) a Eurocurrency Rate for loans with a one month interest period plus 1.00% per annum plus a margin ranging from 0.50% to 1.50% per annum (such margin determined by reference to the leverage ratio set forth in the credit agreement), or (b) the Eurocurrency Rate plus a margin ranging from 1.50% to 2.50% per annum (such margin determined by reference to the leverage ratio set forth in the credit agreement). Certain commitment fees are also payable under the credit agreement. The credit agreement contains various covenants. They include, among others, a maximum net debt to earnings before income tax, depreciation and amortization ratio and a minimum interest coverage ratio. The credit facility is guaranteed by certain of the Company’s domestic subsidiaries (the “Guarantors”). Borrowings under the credit agreement are collateralized by the assets of the Company and the Guarantors, including certain real property, equipment, accounts receivable, inventory and the stock of certain of the Company’s and the Guarantors’ subsidiaries. The Company was in compliance with its financial loan covenants at June 30, 2015. At June 30, 2015, there was a $100,000 balance outstanding on the revolving multi-currency credit facility. The total commitment outstanding on this credit facility includes $722 outstanding letters of credit associated with landlord guarantees and $300 outstanding letters of credit associated with economic development. The Company’s subsidiary, Quebec Silicon, entered into a revolving credit agreement dated October 1, 2010, amended on November 23, 2011 and further amended and restated on September 20, 2012, which provides for up to $15,000 Canadian Dollars to fund Quebec Silicon’s working capital requirements. Funding under the revolving credit agreement is available upon request at any time, up to the full amount of the unused credit commitment and subject to continued compliance with the terms of the agreement. Interest on borrowings under the credit agreement is payable at a variable rate of Canadian prime plus 2.00% (5.00% at June 30, 2015), payable quarterly. The credit agreement expires on September 20, 2015, and may be terminated earlier, at the lender’s discretion subject to certain change in ownership conditions being met. All of Quebec Silicon’s assets, properties and revenues have been pledged as security for Quebec Silicon’s obligations under the revolving credit agreement. As of June 30, 2015, there was no outstanding balance under the facility. c. Other Long-Term Debt Other long-term debt comprises the following: Weighted Outstanding Average Unused Balance Interest Rate Credit Line Other $ 95 19.00% $ — d. Fair Value of Debt The recorded carrying values of our debt balances approximate fair value given our debt is at variable rates tied to market indicators.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Jun. 30, 2015
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued Expenses and Other Current Liabilities	(11) Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities comprise the following at June 30: 2015 2014 Accrued wages, bonuses, and benefits $ 15,640 12,420 Accrued professional fees 5,225 1,183 Current portion of asset retirement obligations 4,092 125 Current portion of capital lease obligations 2,627 2,585 Accrued insurance 2,012 1,386 Accrued income taxes 1,502 3,153 Current portion of retained acquisition contingencies 750 812 Accrued property taxes 825 775 Deferred revenue 641 762 Deferred taxes 188 408 Acquired contract obligations — 3,696 Other 10,185 11,453 Total $ 43,687 38,758

Other Long-Term Liabilities

Other Long-Term Liabilities	12 Months Ended
	Jun. 30, 2015
Other Long-Term Liabilities [Abstract]
Other Long-Term Liabilities	(12) Other Long-Term Liabilities Other long-term liabilities comprise the following at June 30: 2015 2014 Pension and postretirement benefits liability $ 21,055 20,890 Asset retirement obligations 10,672 9,009 Liability classified stock awards 5,529 5,019 Retained acquisition contingencies 5,328 4,953 Capital lease obligations 4,566 7,231 Environmental remediation obligation 1,179 1,111 Other 4,276 2,413 Total $ 52,605 50,626

Derivative Instruments

Derivative Instruments	12 Months Ended
	Jun. 30, 2015
Derivative Instruments [Abstract]
Derivative Instruments	(13) Derivative Instruments The Company enters into derivative instruments to hedge certain interest rate, currency, and commodity price risks. The Company does not engage in interest rate, currency, or commodity speculation, and no derivatives are held for trading purposes. All derivatives are accounted for using mark-to-market accounting. The Company believes it is not practical to designate its derivative instruments as hedging instruments as defined under ASC Subtopic 815-10, Derivatives and Hedging Interest Rate Risk: The Company is exposed to market risk from changes in interest rates on certain of its short-term and long-term debt obligations. The Company has historically utilized interest rate swaps and interest rate cap agreements to reduce our exposure to interest rate fluctuations. All interest rate derivatives were settled when the Company closed on the $300,000 revolving multi-currency credit facility discussed in note 10 (Debt). The Company currently has no interest rate derivatives to reduce exposure to interest rate fluctuations. Foreign Currency Risk: The Company is exposed to market risk arising from changes in currency exchange rates as a result of its operations outside the United States, principally in Argentina, China, Canada, and South Africa. A portion of the Company’s net sales generated from its non-U.S. operations is denominated in currencies other than the U.S. dollar. Most of the Company’s operating costs for its non-U.S. operations are denominated in local currencies, principally the Canadian dollar, Argentine peso, Chinese renminbi, and South African rand. Consequently, the translated U.S. dollar value of the Company’s non-U.S. dollar net sales, and related accounts receivable balances, and its operating costs are subject to currency exchange rate fluctuations. Derivative instruments are not used extensively to manage this risk. At June 30, 2015 and 2014, the Company had no outstanding foreign exchange forward or option contracts. Commodity Price Risk: The Company is exposed to price risk for certain raw materials and energy used in its production process. The raw materials and energy that the Company uses are largely commodities subject to price volatility caused by changes in global supply and demand and governmental controls. Derivative financial instruments are not used extensively to manage the Company’s exposure to fluctuations in the cost of commodity products used in its operations. The Company attempts to reduce the impact of increases in its raw material and energy costs by negotiating long-term contracts and through the acquisition of companies or assets for the purpose of increasing its access to raw materials with favorable pricing terms. At June 30, 2015 and 2014, the Company had no outstanding power hedge agreements. The effect of the Company’s derivative instruments on the consolidated statements of operations is summarized in the following table: (Loss) Gain Recognized During the Years Ended June 30 Location 2015 2014 2013 of (Loss) Gain Foreign exchange forward and option contracts — (603) (701) Foreign exchange (loss) Power hedge — — 424 Cost of goods sold At June 30, 2015, the Company had no outstanding derivative instruments.

Benefit Plans

Benefit Plans	12 Months Ended
	Jun. 30, 2015
Benefit Plans [Abstract]
Benefit Plans	(14) Benefit Plans a. Defined Benefit Retirement and Postretirement Plans The Company’s subsidiary, Globe Metallurgical Inc. (GMI), sponsors three noncontributory defined benefit pension plans covering certain employees. These plans were frozen in 2003. The Company’s subsidiary, Core Metals, sponsors a noncontributory defined benefit pension plan covering certain employees. This plan was closed to new participants in April 2009. The Company’s subsidiary, Quebec Silicon, sponsors a contributory defined benefit pension plan and postretirement benefit plan for certain employees, based on length of service and remuneration. Postretirement benefits consist of a group insurance plan covering plan members for life insurance, disability, hospital, medical, and dental benefits. The contributory defined benefit pension plan was closed to new participants in December 2013. The Company’s funding policy has been to contribute, as necessary, an amount in excess of the minimum requirements in order to achieve the Company’s long-term funding targets. During the years ended June 30, 2015 and 2014, the Company made contributions of $1,303 and $2,971, respectively, to the pension and other benefit plans. The Company uses a June 30 measurement date for these defined benefit plans. Benefit Obligations and Funded Status Pension Plans Nonpension Postretirement Plan 2015 2014 2015 2014 Change in benefit obligations: Benefit obligations at beginning of year $ 62,525 59,542 $ 9,065 13,316 Interest cost 2,422 2,623 360 518 Service cost 413 414 339 640 Plan curtailments — — — (5,831) Plan amendments 307 — — — Employee contributions 43 52 — — Actuarial loss (gain) 1,939 3,063 (417) 758 Benefits paid (2,802) (2,789) (116) (109) Net transfer in 229 — — — Effect of exchange rate changes (3,823) (380) (1,317) (227) Benefit obligations at end of year $ 61,253 62,525 $ 7,914 9,065 Change in plan assets: Fair value of plan assets at beginning of year $ 50,500 43,407 $ — — Actual return on plan assets 1,952 7,419 — — Employer contributions 1,187 2,862 116 109 Employee contributions 43 52 — — Benefits paid (2,802) (2,789) (116) (109) Expenses paid (240) (209) — — Net transfer in 80 — — — Effect of exchange rate changes (2,763) (242) — — Fair value of plan assets at end of year $ 47,957 50,500 $ — — Funded status at end of year: Fair value of plan assets $ 47,957 50,500 $ — — Benefit obligations 61,253 62,525 7,914 9,065 Funded status $ (13,296) (12,025) $ (7,914) (9,065) Amounts recognized in the consolidated balance sheet consist of: Noncurrent liability $ (13,296) (12,025) $ (7,715) (8,865) Current liability — — (199) (200) Accumulated other comprehensive loss 12,253 9,310 277 779 At June 30, 2015 and 2014, the accumulated benefit obligations were $59,348 and $59,888, respectively, for the defined benefit pension plans. All of our pension and postretirement plans are underfunded, and have been underfunded for all years presented. The amounts recognized in accumulated other comprehensive (loss) income consist primarily of net actuarial loss as well as a component related to prior service cost, which is not material. Reclassification adjustments out of accumulated other comprehensive (loss) income, which totaled $702 for the year ended June 30, 2015, are recognized as components of net periodic pension expense. Net Periodic Pension Expense Pension Plans Nonpension Postretirement Plans 2015 2014 2013 2015 2014 2013 Interest cost $ 2,422 2,623 2,571 $ 360 518 617 Service cost 413 414 893 339 640 1,172 Expected return on plan assets (3,146) (2,791) (2,516) — — — Amortization of net loss 702 1,054 1,608 — — — Curtailment gain — — — — (5,831) — Net periodic pension expense $ 391 1,300 2,556 $ 699 (4,673) 1,789 In fiscal year 2016, net actuarial losses of approximately $1,248 are expected to be recognized into net periodic pension expense from accumulated other comprehensive income. The amount of prior service cost we expect to recognize in 2016 as a component of net periodic pension expense is not material. Assumptions and Other Data Pension Plans Nonpension Postretirement Plans 2015 2014 2015 2014 Discount rate 4.00 to 4.15% 4.00 to 4.30% 4.20% 4.40% The discount rate used in calculating the present value of our pension plan obligations is developed based on the Citigroup Pension Discount Curve for both the GMI plans and Core Metals plan, and the Mercer Yield Curve for Quebec Silicon pension and postretirement benefit plans and the expected cash flows of the benefit payments. The assumptions used to determine net periodic expense for the Company’s defined benefit pension plans for years ended June 30, 2015, 2014, and 2013 are as follows: Pension Plans Nonpension Postretirement Plans 2015 2014 2013 2015 2014 2013 Discount rate 4.00 to 4.30% 3.75 to 4.75% 3.50 to 5.00% 4.40% 4.85% 5.10% Expected return on plan assets 5.70 to 7.00% 5.70 to 7.00% 5.70 to 7.00% NA NA NA Expected return on plan assets is determined based on management’s expectations of long-term average rates of return on funds invested to provide for benefits included in the projected benefit obligations. In determining the expected return on plan assets, the Company takes into account historical returns, plan asset allocations and related investment strategies, as well as the outlook for inflation and overall fixed income and equity returns. The Company expects to make discretionary contributions of approximately $1,237 to the defined benefit pension and postretirement plans for the year ending June 30, 2016. The following reflects the gross benefit payments that are expected to be paid for the benefit plans for the years ended June 30: Nonpension Postretirement Pension Plans Plans 2016 $ 2,889 $ 199 2017 3,097 227 2018 3,194 241 2019 3,284 249 2020 3,345 253 Years 2021-2025 17,058 1,410 The accumulated nonpension postretirement benefit obligation has been determined by application of the provisions of the Company’s health care and life insurance plans including established maximums, relevant actuarial assumptions and health care cost trend rates projected at 6.0% for fiscal 2015 and decreasing to an ultimate rate of 4.3% in fiscal 2033. The effect of a 1% increase in health care cost trend rate on nonpension postretirement net periodic benefit costs and the benefit obligations is $179 and $1,509, respectively. The effect of a 1% decrease in health care cost trend rate on nonpension postretirement net periodic benefit costs and the benefit obligation is ($133) and ($1,178), respectively. The Company’s overall strategy is to invest in high-grade securities and other assets with a limited risk of market value fluctuation. In general, the Company’s goal is to maintain the following allocation ranges: Equity securities 40 to 50% Fixed income securities 40 to 50% Real estate 5 to 10% The fair values of the Company’s pension plan assets at June 30: Quoted Prices in Active Markets for Identical Assets (Level 1) 2015 2014 Cash and cash equivalents $ 818 637 Equity securities: Domestic equity mutual funds 5,380 5,563 International equity mutual funds 4,707 4,890 Commingled domestic equity funds 3,634 4,036 Commingled international equity funds 8,849 10,255 Fixed income securities: Fixed income mutual funds 10,556 11,059 Commingled fixed income funds 12,813 12,857 Real estate mutual funds 1,200 1,203 Total $ 47,957 50,500 Equity securities include domestic and international equity mutual funds and commingled domestic and international equity funds. Fixed income securities include fixed income mutual funds and commingled fixed income funds. In addition, a portion of the plan assets are in real estate mutual funds. For all plan assets, fair values were based on quoted prices in active markets and were therefore classified within Level 1 of the fair value hierarchy as of June 30, 2015. See note 20 (Fair Value Measures) for additional disclosures related to the fair value hierarchy. The Company held no level 2 or level 3 assets during the year ended June 30, 2015. b. Other Benefit Plans The Company administers healthcare benefits for certain retired employees through a separate welfare plan requiring reimbursement from the retirees. The Company’s subsidiary, GMI, provides two defined contribution plans (401(k) plans) that allow for employee contributions on a pretax basis. The Company agrees to match 25% of participants’ contributions up to a maximum of 6% of compensation. Company matching contributions for the years ended June 30, 2015, 2014, and 2013 were $579, $393, and $344, respectively. Additionally, subsequent to the acquisition of Core Metals, the Company began sponsoring the Core Metals defined contribution plan. Under the plan the Company may make discretionary payments to salaried and non-union participants in the form of profit sharing and matching funds. Company matching contributions for the years ended June 30, 2015, 2014, and 2013 were $142, $71, and $95, respectively. Other benefit plans offered by the Company include a Section 125 cafeteria plan for the pretax payment of healthcare costs and flexible spending arrangements.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2015
Income Taxes [Abstract]
Income Taxes	(15) Income Taxes The sources of income (loss) before provision for income taxes and income attributable to noncontrolling interest for the years ended June 30, 2015, 2014, and 2013 were as follows: 2015 2014 2013 U.S. operations $ 54,999 1,822 17,541 Non-U.S. operations 1,279 31,789 (34,616) Total $ 56,278 33,611 (17,075) The components of current and deferred income tax expense (benefit) are as follows: 2015 2014 2013 Current: Federal $ 13,402 (1,502) 3,120 State 1,355 1,428 696 Foreign 2,777 4,048 2,459 Total current 17,534 3,974 6,275 Deferred: Federal 2,942 (1,807) 2,440 State 642 3,875 (5,568) Foreign 533 1,663 (413) Total deferred 4,117 3,731 (3,541) Total provision for income taxes $ 21,651 7,705 2,734 The following is a reconciliation, stated in percentage, of the U.S. statutory federal income tax rate to our effective tax rate for the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Federal statutory rate 35.0% 35.0% 35.0% State taxes, net of federal benefit 0.6 2.5 7.5 Bargain purchase gain — (30.8) — Foreign rate differential (0.5) 0.5 (9.0) Change in valuation allowance 2.0 16.0 3.4 Goodwill and other asset impairments — — (57.4) Domestic production activities deduction (1.8) — 1.7 Step acquisition — — 9.6 Foreign non-deductible loss — 8.5 (10.9) Uncertain tax position changes (0.3) (1.0) (4.0) Noncontrolling interest (2.0) (4.9) 5.3 Other 5.5 (2.9) 2.8 Effective tax rate 38.5% 22.9% (16%) During the year ended June 30, 2014, the Company recorded a nontaxable bargain purchase gain of $29,538 in connection with the acquisition of Siltech. See note 3 for additional information regarding the acquisition. As of June 30, 2015, the Company had approximately $84,983 of undistributed foreign earnings. We intend to reinvest earnings outside the U.S. for the foreseeable future and, therefore, have not recognized any U.S. tax expense on these earnings. It is not practicable for the Company to determine the amount of unrecognized U.S. tax expense on these reinvested foreign earnings. We have provided for tax on earnings of $2,174 in Argentina that we do not consider permanently reinvested. Significant components of the Company’s deferred tax assets and deferred tax liabilities at June 30, 2015 and 2014 consist of the following: 2015 2014 Deferred tax assets: Inventories $ 1,955 1,173 Accounts receivable 197 530 Accruals 16,202 8,845 Deferred revenue 12 52 Net operating losses and other carryforwards 23,501 24,114 Share-based compensation 7,051 8,414 Other 3,033 3,804 Gross deferred tax assets 51,951 46,932 Valuation allowance (20,934) (18,531) Net deferred tax assets 31,017 28,401 Deferred tax liabilities: Fixed assets (71,737) (69,929) Prepaid expenses (1,010) (1,482) Other (2,142) (300) Total deferred tax liabilities (74,889) (71,711) Net deferred tax liabilities $ (43,872) (43,310) A portion of the Company’s net operating loss carry forwards (NOLs) are subject to various limitations and expire at various dates in the future as follows: Amount Expires Federal $ 18,386 2025 through 2026 State 303,945 2015 through 2034 Foreign 20,405 2015 through 2035 The Company maintains valuation allowances where it is more likely than not that all or a portion of a deferred tax asset will not be realized. In determining whether a valuation allowance is warranted, the Company evaluates factors such as prior earnings history, expected future earnings, carry back and carry forward periods and tax strategies that could potentially enhance the likelihood of the realization of a deferred tax asset. It is more likely than not that the results of future operations will generate sufficient taxable income to realize the deferred tax assets. For the year ended June 30, 2015, the increase in the valuation allowance of $2,403 was primarily attributable to a valuation allowance placed upon certain net operating losses and credits which are unlikely to be utilized due to a change in the Company’s tax structure that resulted in a decrease in expected tax liability for those states, and for a full valuation allowance on net operating losses generated in China, Netherlands and South Africa. For the year ended June 30, 2014, the valuation allowance was primarily attributable to valuation allowance placed upon certain net operating losses and credits in certain state jurisdictions and full valuation allowance on the deferred tax assets in foreign jurisdictions of China, Netherlands and South Africa. The total valuation allowance at June 30, 2015 and 2014 is $20,934, and $18,531, respectively, relates to the following: 2015 2014 Federal NOLs $ 4,467 4,467 State NOLs 4,177 861 Foreign NOLs 8,621 9,201 Federal credits 236 236 State credits 3,433 3,766 Total $ 20,934 18,531 The Company files a consolidated U.S. income tax return and tax returns in various state and local jurisdictions. Our subsidiaries also file tax returns in various foreign jurisdictions. The Company’s principal jurisdictions include the U.S., Canada, Argentina, and China. The number of open tax years subject to examination varies depending on the tax jurisdiction. The Company’s major taxing jurisdictions and the related open tax years subject to examination are as follows: the U.S. from 2012 to present, Canada from 2012 to present, Argentina from 2010 to present, and China from 2011 to present. Our U.S. federal income tax filing for the year ended June, 30 2012 is under routine examination. The following is a tabular reconciliation of the total amount of unrecognized tax benefits for the year, excluding interest and penalties: 2015 2014 2013 Balance at the beginning of the year $ 795 1,115 522 Gross increases for prior year tax positions 210 — 659 Gross decreases for prior year tax positions — — — Lapse in statute of limitations (307) (320) (66) Balance at the end of the year $ 698 795 1,115 Interest and penalties related to uncertain tax positions are recognized in income tax expense. Included in our liability for uncertain tax positions are interest and penalties of $68, $138, and $170 for the years ended June 30, 2015, 2014, and 2013, respectively. For the years ended June 30, 2015, 2014, and 2013, we recognized ($70), ($31), and $98 respectively, of interest and penalties in income tax benefit/provision. The Company believes that it is reasonably possible that approximately $310 of its uncertain tax position liability at June 30, 2015 may be recognized within the next twelve months as the statutes of limitations will expire. The portion of uncertain tax positions as of June 30, 2015 that would, if recognized, impact the effective tax rate was $698, $795, and $1,115 as of June 30, 2015, 2014, and 2013, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2015
Commitments and Contingencies [Abstract]
Commitments and Contingencies	(16) Commitments and Contingencies a. Legal Contingencies The Company is subject to various lawsuits, investigations, claims, and proceedings that arise in the normal course of business, including, but not limited to, labor and employment, commercial, environmental, safety, and health matters, as well as claims and indemnities associated with its historical acquisitions and divestitures. Although it is not presently possible to determine the outcome of these matters, in the opinion of management, it is not reasonably possible that the ultimate disposition of these matters will have a material adverse effect on the Company’s consolidated financial position, results of operations, or liquidity. During the fiscal year ended June 30, 2015, the Company recorded an expense of $4,559 with respect to an indemnification obligation from a prior divestiture, of which $1,659 is unpaid and is included in Other long-term liabilities at June 30, 2015. Litigation Related to the Proposed Business Combination On March 23, 2015, a putative class action lawsuit was filed on behalf of the Company’s shareholders (“Company Shareholders”) in the Court of Chancery of the State of Delaware. The action, captioned Fraser v. Globe Specialty Metals, Inc., et al. On April 1, 2015, a purported Company Shareholder filed a putative class action lawsuit on behalf of Company Shareholders challenging the Business Combination in the Court of Chancery of the State of Delaware. The action, captioned City of Providence v. Globe Specialty Metals, Inc., et al On April 10, 2015, a purported Company Shareholder filed a putative class action lawsuit on behalf of Company Shareholders challenging the Business Combination in the Court of Chancery of the State of Delaware. The action, captioned Int’l Union of Operating Engineers Local 478 Pension Fund v. Globe Specialty Metals, Inc., et al. City of Providence v. Globe Specialty Metals, Inc., et al. On April 21, 2015, a purported Company Shareholder filed a putative class action lawsuit on behalf of Company Shareholders challenging the Business Combination in the Court of Chancery of the State of Delaware. The action, captioned Cirillo v. Globe Specialty Metals, Inc., et al. On May 4, 2015, the Court of Chancery of the State of Delaware consolidated these four actions for all purposes into C.A. No. 10865-VCG, now captioned In re Globe Specialty Metals, Inc. Stockholders Litigation On June 15, 2015, Plaintiffs filed an amended consolidated class action complaint, realleging, among other things, that the Company’s board of directors and Chief Executive Officer, aided and abetted by Grupo VM, FerroAtlántica, Merger Sub and VeloNewco, breached their fiduciary duties by entering into the Business Combination for inadequate consideration and that certain provisions in the Business Combination Agreement unfairly deterred a potential alternative transaction. The amended complaint further alleges that, among other things, the Company’s preliminary proxy statement/prospectus filed with the SEC on May 6, 2015, is materially misleading and incomplete, and that the Company’s board of directors and Chief Executive Officer breached their fiduciary duties by failing to disclose purportedly material information to Company Shareholders in connection with the Business Combination. The amended complaint seeks, among other relief, an order enjoining the Defendants from consummating the proposed Business Combination; a declaration that the disclosures contained in the preliminary proxy statement/prospectus are deficient; damages; and attorneys’ fees and costs. On August 10, 2015, Plaintiffs filed their opening brief in support of their motion for preliminary injunction. The amended complaint does not specify the amount of damages sought by Plaintiffs in the consolidated action and it is not presently possible to determine the outcome of these matters. Accordingly, the possible loss, if any, related to these matters is uncertain and cannot be reasonably estimated at this time. b. Environmental Contingencies It is the Company’s policy to accrue for costs associated with environmental assessments, remedial efforts, or other environmental liabilities when it becomes probable that a liability has been incurred and the costs can be reasonably estimated. When a liability for environmental remediation is recorded, such amounts will be recorded without giving effect to any possible future recoveries. At June 30, 2015, there are no significant liabilities recorded for environmental contingencies. With respect to the cost for ongoing environmental compliance, including maintenance and monitoring, such costs are expensed as incurred unless there is a long-term monitoring agreement with a governmental agency, in which case a liability is established at the inception of the agreement. c. Asset Retirement Obligations As of June 30, 2015 and 2014, the Company has recorded asset retirement obligation accruals for mine reclamation and preparation plant closure costs totaling $14,764 and $9,134, respectively. There were no assets that were legally restricted for purposes of settling asset retirement obligations at June 30, 2015 or 2014. d. Employee Contracts As of June 30, 2015, the Company had 1,684 employees. The Company’s total employees consist of 532 salaried employees and 1,152 hourly employees, and include 625 unionized employees. 37% of the workforce is covered by collective bargaining agreements and 6% of the workforce is covered by collective bargaining agreements expiring within one year of June 30, 2015. e. Contract Acquisition Cost During the fiscal year ended June 30, 2014, the Company acquired a supply arrangement that resulted in a payment of $16,000, which impacted operating income for the period. f. Contractual Commitments The Company leases certain machinery and equipment, automobiles, railcars and office space. For the years ended June 30, 2015, 2014, and 2013, lease expense was $4,649, $5,059, and $4,038, respectively. The following table summarizes our contractual commitments by period: 2021 and Total 2016 2017 2018 2019 2020 Beyond Long-term debt obligations $ 101,048 953 50 45 100,000 — — Power commitments 17,794 17,794 — — — — — Purchase commitments 42,646 31,486 11,160 — — — — Operating lease obligations 8,472 2,247 1,473 575 528 524 3,125 Capital lease obligations 7,193 2,627 2,389 408 497 435 837

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jun. 30, 2015
Stockholders' Equity [Abstract]
Stockholders' Equity	(17) Stockholders’ Equity a. Preferred Stock The Company is authorized to issue one million shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the board of directors. To date, no preferred stock has been issued by the Company. b. Treasury Stock On December 13, 2013, the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $75,000 of the Company’s common stock valid through December 31, 2014. The program did not obligate the Company to acquire any particular amount of shares. On November 5, 2014, the Company extended its previously announced stock repurchase program, authorizing the repurchase of up to $45,800 of its common shares through December 31, 2015. During the fiscal year ended June 30, 2015, 13,066 shares were repurchased at an aggregated cost of $242. During the fiscal year ended June 30, 2014, 1,591,566 shares were repurchased at an aggregated cost of $28,962. c. Noncontrolling Interest Yonvey Share Purchase In January 2013, the Company purchased an additional 28% ownership interest in Yonvey for $2,330, bringing the Company’s ownership interest in Yonvey to 98%. d. Dividend On February 10, 2014, the Company’s Board of Directors approved an increase to the annual dividend to $0.300 per common share, payable quarterly in March 2014, June 2014, September 2014, and December 2014. The March 2014 quarterly dividend of $0.075 per share, totaling $5,559, was paid on March 12, 2014 to shareholders of record at the close of business on February 26, 2014. The June 2014 quarterly dividend of $0.075 per share, totaling $5,541, was paid on June 24, 2014 to shareholders of record at the close of business on June 10, 2014. The September 2014 quarterly dividend of $0.075 per share, totaling $5,532, was paid on September 24, 2014 to shareholders of record at the close of business on September 10, 2014. The December 2014 quarterly dividend of $0.075 per share, totaling $5,531, was paid on December 22, 2014 to shareholders of record at the close of business on December 8, 2014. On February 3, 2015, the Company’s Board of Directors approved an annual dividend of $0.32 per common share, payable quarterly. Accordingly, a quarterly dividend of $0.08 per share, totaling $5,900, was paid on March 12, 2015 to shareholders of record at the close of business on February 26, 2015. On May 5, 2015, the Company’s board of directors approved the quarterly payment of the annual dividend of $0.32 per common share. The June quarterly dividend of $0.08 per share, totaling $5,900, was paid on June 24, 2015 to shareholders of record at the close of business on June 10, 2015. The September 2013 quarterly dividend of $0.06875 per share, totaling $5,178, was paid on September 24, 2013 to shareholders of record at the close of business on September 10, 2013. The December 2013 quarterly dividend of $0.06875 per share, totaling $5,178, was paid on December 23, 2013 to shareholders of record at the close of business on December 9, 2013.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Jun. 30, 2015
Earnings (Loss) Per Share [Abstract]
Earnings (Loss) Per Share	(18) Earnings (Loss) Per Share Basic earnings (loss) per common share are calculated based on the weighted average number of common shares outstanding during the years ended June 30, 2015, 2014, and 2013, respectively. Diluted earnings (loss) per common share assumes the exercise of stock options or the vesting of restricted stock grants, provided in each case the effect is dilutive. The reconciliation of the amounts used to compute basic and diluted earnings (loss) per common share for the years ended June 30, 2015, 2014, and 2013, is as follows: 2015 2014 2013 Basic earnings (loss) per share computation Numerator: Net income (loss) attributable to Globe Specialty Metals, Inc. $ 31,320 21,703 (21,028) Denominator: Weighted average basic shares outstanding 73,750,764 74,674,466 75,206,656 Basic earnings (loss) per common share $ 0.42 0.29 (0.28) Diluted earnings (loss) per share computation Numerator: Net income (loss) attributable to Globe Specialty Metals, Inc. $ 31,320 21,703 (21,028) Denominator: Weighted average basic shares outstanding 73,750,764 74,674,466 75,206,656 Effect of dilutive securities 141,066 118,551 — Weighted average diluted shares outstanding 73,891,830 74,793,017 75,206,656 Diluted earnings (loss) per common share $ 0.42 0.29 (0.28) The following potential common shares were excluded from the calculation of diluted earnings (loss) per common share because their effect would be anti-dilutive: 2015 2014 2013 Stock options and restricted stock grants 103,630 172,500 367,554

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Jun. 30, 2015
Share-Based Compensation [Abstract]
Share-Based Compensation	(19) Share-Based Compensation a. Stock Plan The Company’s share-based compensation program consists of the Globe Specialty Metals, Inc. 2006 Employee, Director and Consultant Stock Plan (the Stock Plan). The Stock Plan was initially approved by the Company’s stockholders on November 10, 2006, and was amended and approved by the Company’s stockholders on December 6, 2010 to increase by 1,000,000 the number of shares of common stock authorized for issuance under the Stock Plan. The Stock Plan, as amended, provides for the issuance of a maximum of 6,000,000 shares of common stock for the granting of incentive stock options, nonqualified options, stock grants, and share-based awards. Any remaining shares available for grant, but not yet granted, will be carried over and used in the following fiscal years. On August 17, 2012, the Board authorized the Company to offer to amend outstanding options representing the right to purchase shares issued to directors, officers and current employees pursuant to the Stock Plan, to permit these options alternatively to be settled for cash or exercised for the issuance of shares, at the election of the option holder. This modification of the outstanding options changed its classification from equity awards to liability awards and the fair value of the liability awards is remeasured at the end of each reporting period through settlement. These outstanding options are excluded from the weighted average diluted shares outstanding calculation in note 18 (Earnings (Loss) Per Share). The Company believes the outstanding options will be settled in cash. At June 30, 2015, there were 2,450,521 shares available for grant. All option grants have vesting terms of up to 3 years and maximum contractual terms ranging from 5 to 10 years. It is the Company’s policy to issue new shares to satisfy the requirements of its share-based compensation plan. The Company does not expect to repurchase shares in the future to support its share-based compensation plan. A summary of the changes in options outstanding under the Stock Plan for the years ended June 30, 2015, 2014, and 2013 is presented below: Weighted- Average Weighted- Remaining Aggregate Number of Average Contractual Intrinsic Options Exercise Price Term in Years Value Outstanding as of June 30, 2012 4,365,397 $ 8.10 Granted 13,188 13.43 Exercised (583,333) 4.03 Forfeited and expired — — Outstanding as of June 30, 2013 3,795,252 $ 8.74 Outstanding as of June 30, 2013 3,795,252 $ 8.74 Granted 439,211 15.82 Forfeited and converted to SARs (2,447,500) 4.06 Exercised (45,521) 9.10 Forfeited and expired (26,446) 19.94 Outstanding as of June 30, 2014 1,714,996 $ 17.05 Outstanding as of June 30, 2014 1,714,996 $ 17.05 Granted 31,130 17.46 Exercised (56,990) 11.92 Forfeited and expired (100,000) 19.87 Outstanding as of June 30, 2015 1,589,136 $ 17.06 1.97 $ 3,012 Exercisable as of June 30, 2015 1,307,745 $ 17.36 1.75 $ 2,241 The weighted average grant date fair value of stock options granted during the years ended June 30, 2015, 2014, and 2013 was $5.63, $5.27, and $4.55, respectively. The total intrinsic value of options exercised during the years ended June 30, 2015, 2014, and 2013, was $457, $507, and $6,061, respectively. The total fair value of stock options vested during the years ended June 30, 2015, 2014, and 2013, was $2,982, $2,186, and $2,275, respectively. Of the unvested options as of June 30, 2015, 168,305 will vest and become exercisable as of June 30, 2016 and 113,086 will vest and become exercisable as of June 30, 2018. The Company estimates the fair value of stock options using the Black-Scholes option pricing model. The following assumptions were used to estimate the fair value of stock option awards granted during the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Risk-free interest rate 1.56 to 1.74% 0.64 to 1.64% 0.15 to 1.38% Expected dividend yield 1.46 to 1.92% 1.41 to 2.21% 2.30% Expected volatility 40.42 to 44.25% 41.07 to 47.79% 29.89 to 59.90% Expected term (years) 5.00 3.00 to 5.00 0.83 to 5.31 The risk-free interest rate is based on the yield of zero coupon U.S. Treasury bonds with terms similar to the expected term of the options. The expected dividend yield is estimated over the expected life of the options based on our historical annual dividend activity reflects movements in our stock price over the most recent historical period equivalent to the expected life of the options. During the fiscal year ended June 30, 2015, 387,247 options vested. There are total vested options of 1,307,745 and 281,391 unvested options outstanding at June 30, 2015. For the years ended June 30, 2015, 2014, and 2013, share-based compensation expense related to stock options was $2,648 ($1,589 after tax), $13,552 ($8,131 after tax), and $15,333 ($9,200 after tax), respectively. The expense is reported within selling, general, and administrative expenses. b. Executive Bonus Plan In addition to share-based awards issued under the Stock Plan, the Company issues restricted stock units under the Company’s Executive Bonus Plan. The fair value of restricted stock units is based on quoted market prices of the Company’s stock at the end of each reporting period. These restricted stock units proportionally vest over three years, but are not delivered until the end of the third year. The Company will settle these awards by cash transfer, based on the Company’s stock price on the date of transfer. During the year ended June 30, 2015, there were 137,597 restricted stock units granted, 452,142 restricted options were exercised, and as of June 30, 2015, 348,866 restricted stock units were outstanding. For the years ended June 30, 2015 and 2014, share-based compensation expense for these restricted stock units was $1,025 ($615 after tax) and $7,298 ($4,378 after tax), respectively. The expense is reported within selling, general, and administrative expenses. Of the $3,047 liability associated with these restricted stock units at June 30, 2015, $2,162 is included in share-based liabilities and $885 is included in other long-term liabilities. c. Stock Appreciation Rights The Company issues cash-settled stock appreciation rights as an additional form of incentivized bonus. Stock appreciation rights vest and become exercisable in one-third increments over three years. The Company settles all awards by cash transfer, based on the difference between the Company’s stock price on the date of exercise and the date of grant. The Company estimates the fair value of stock appreciation rights using the Black-Scholes option pricing model. During the year ended June 30, 2015, there were 655,330 stock appreciation rights issued. During the year ended June 30, 2015, there were 4,262 and 46,700 stock appreciation rights that were exercised and forfeited, respectively. There were 1,976,957 stock appreciation rights outstanding as of June 30, 2015. For the years ended June 30, 2015 and 2014, pre-tax compensation expense for these stock appreciation rights was $1,602 and $14,767, respectively. The expense is reported within selling, general, and administrative expenses. Of the $4,656 liability associated with these stock appreciation rights at June 30, 2015, $209 is included in share-based liabilities and $4,447 is included in other long-term liabilities. d. Unearned Compensation Expense As of June 30, 2015, the Company has unearned pre-tax compensation expense of $206, related to nonvested liability classified stock options, which will be recognized over a weighted average term of 0.11 years. The unearned compensation expense represents the minimum expense to be recognized over the grant date vesting terms or earlier as a result of accelerated expense recognition due to remeasurement of compensation cost for liability classified awards. Future expense may exceed the unearned compensation expense in the future due to the remeasurement of liability classified awards. As of June 30, 2015, the Company has unearned pre-tax compensation expense of $578 and $1,080 related to nonvested equity classified stock options and restricted stock grants, which will be recognized over a weighted average term of 1.36 and 5.38 years, respectively.

Fair Value Measures

Fair Value Measures	12 Months Ended
	Jun. 30, 2015
Fair Value Measures [Abstract]
Fair Value Measures	(20) Fair Value Measures ASC 820, Fair Value Measurements Level 1 Level 2 Level 3 The following table summarizes assets measured at fair value on a recurring basis at June 30, 2015: Total Level 1 Marketable securities $ 4,965 4,965 Total assets at fair value $ 4,965 4,965 The following table summarizes assets measured at fair value on a recurring basis at June 30, 2014. Total Level 1 Marketable securities $ 10,399 10,399 Total assets at fair value $ 10,399 10,399 The Company does not have any liabilities that are required to be remeasured at fair value at June 30, 2015 or at June 30, 2014. Marketable securities primarily consist of corporate bonds for which fair values were based on quoted prices in active markets and were therefore classified within Level 1 of the fair value hierarchy See note 10 (Debt) for information regarding the fair value of the Company’s outstanding debt.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Jun. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	(21) Related Party Transactions From time to time, the Company enters into transactions in the normal course of business with related parties. A current and a former member of the board of directors are affiliated with Marco International. During the years ended June 30, 2015, 2014, and 2013, the Company: • Entered into agreements with Marco International to purchase carbon electrodes. Purchases under these agreements totaled $19,573, $19,217, and $34,785, respectively. At June 30, 2015 and 2014, payables to Marco International under these agreements totaled $951 and $1,140, respectively. • Entered into agreements with Marco International to purchase rare earth minerals. Purchases under these agreements totaled $826, $559, and $0, respectively. At June 30, 2015 and 2014, payables to Marco International under these agreements totaled $148 and $0, respectively. • Entered into agreements to sell ferrosilicon to Marco International. Net sales under these agreements totaled $778, $641, and $411, respectively. At June 30, 2015 and 2014, receivables from Marco International under these agreements totaled $71 and $0, respectively. • Entered into agreements to sell calcium silicon powder to Marco International. Net sales under these agreements totaled $176, $4,173, and $1,344, respectively. At June 30, 2015 and 2014, receivables from Marco International under these agreements totaled $176 and $0, respectively.

Operating Segments

Operating Segments	12 Months Ended
	Jun. 30, 2015
Operating Segments [Abstract]
Operating Segments	(22) Operating Segments Operating segments are based upon the Company’s management reporting structure and include the following five reportable segments: • GMI — • Globe Metales — • Solsil — • Corporate — • Other — Each of the Company’s reportable segments distributes its products in both its country of domicile, as well as to other international customers. The following presents the Company’s consolidated net sales by product line for the years ended June 30: 2015 2014 2013 Silicon metal $ 450,788 377,954 422,564 Silicon-based alloys 261,258 282,998 248,276 Other 88,727 91,865 86,710 Total $ 800,773 752,817 757,550 a. Segment Data Summarized financial information for our reportable segments as of, and for, the years ended June 30, 2014, 2013, and 2012 are shown in the following tables: 2015 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 753,905 43,222 114,733 2 (2,085) 112,768 610,592 (36,813) Globe Metales 44,945 2,463 1,351 74 (733) (18) 67,167 (1,535) Solsil — — (81) — — (45) 15,566 — Corporate — 288 (45,533) 12 (1,522) (46,005) 320,421 (334) Other 36,308 5,056 (8,565) 179 (3) (10,405) 98,469 (11,337) Eliminations (34,385) — (14) — — (17) (282,854) — $ 800,773 51,029 61,891 267 (4,343) 56,278 829,361 (50,019) 2014 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 697,403 39,069 67,047 26 (2,760) 64,237 657,714 (42,139) Globe Metales 51,213 2,414 5,746 18 (676) 2,671 72,529 (3,680) Solsil — — (42) — — (33) 15,633 — Corporate — 249 (53,680) 16 (4,586) (28,523) 385,442 (653) Other 12,651 2,090 (3,981) 7 — (4,461) 76,758 (603) Eliminations (8,450) — (280) — — (280) (362,950) — $ 752,817 43,822 14,810 67 (8,022) 33,611 845,126 (47,075) 2013 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 702,275 40,274 73,615 1 (4,107) 68,274 686,609 (35,543) Globe Metales 51,266 2,009 (2,388) 781 (1,168) (3,751) 74,517 (1,168) Solsil — 362 (21,147) — — (21,147) 15,347 (30) Corporate — 388 (47,634) 37 (1,611) (48,984) 419,504 (7,603) Other 11,641 2,075 (10,762) 1 (1) (10,837) 28,615 (165) Eliminations (7,632) — (631) — — (630) (352,969) — $ 757,550 45,108 (8,947) 820 (6,887) (17,075) 871,623 (44,509) 1 — Net of capitalized interest. The accounting policies of our operating segments are the same as those disclosed in note 2 (Summary of Significant Accounting Policies). We evaluate segment performance principally based on operating income (loss). Intersegment net sales are not material. b. Geographic Data Net sales are attributed to geographic regions based upon the location of the selling unit. Net sales by geographic region for the years ended June 30, 2015, 2014, and 2013 consist of the following: 2015 2014 2013 United States $ 635,941 628,673 590,011 Argentina 32,240 43,804 44,240 Canada 112,532 68,091 112,073 China 188 283 255 Poland 12,147 11,966 10,971 South Africa 7,725 — — Total $ 800,773 752,817 757,550 Long-lived assets by geographical region at June 30, 2015, 2014, and 2013 consist of the following: 2015 2014 2013 United States $ 341,023 334,559 328,326 Argentina 24,684 25,611 24,344 Canada 73,290 90,071 95,591 China 13,293 15,029 16,955 Poland 741 813 885 South Africa 45,558 46,906 — Total $ 498,589 512,989 466,101 Long-lived assets consist of property, plant, and equipment, net of accumulated depreciation, depletion and amortization, and goodwill and other intangible assets. c. Major Customer Data The following is a summary of the Company’s major customers and their respective percentages of consolidated net sales for the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Dow Corning 21% 18% 19% All other customers 79% 82% 81% Total 100% 100% 100% The majority of sales to Dow Corning for the years ended June 30, 2015, 2014 and 2013 are associated with Dow Corning’s 49% ownership interest in WVA Manufacturing LLC and QSLP. Sales to Dow Corning are included in the GMI segment.

Business Interruption Insurance

Business Interruption Insurance Recovery	12 Months Ended
	Jun. 30, 2015
Business Interruption Insurance Recovery [Abstract]
Business Interruption Insurance Recovery	(23) Business Interruption Insurance Recovery In November 2011, there was a fire at the Bridgeport, Alabama ferrosilicon plant. The Company recorded and received business interruption insurance recovery payments totaling $4,046 in March 2013. Prior to acquisition, there was a fire at the Quebec Silicon plant. The Company recorded and received a business interruption insurance recovery payment totaling $548 in March 2013.

Contract Acquisition Costs

Contract Acquisition Costs	12 Months Ended
	Jun. 30, 2015
Contract Acquisition Costs [Abstract]
Contract Acquisition Costs	(24) Contract Acquisition Costs During the twelve months ended June 30, 2014, the Company acquired a supply arrangement that resulted in a payment of $16,000,000.

Subsequent Events

Subsequent Events	12 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	(25) Subsequent Events On August 21, 2015, our Board of Directors approved a quarterly dividend per common share of $0.08 in furtherance of an annual calendar 2015 dividend authorized of $0.32 per common share. The September 2015 quarterly dividend of $0.08 per share is payable on September 24, 2015 to shareholders of record at the close of business on September 13, 2015.

Unaudited Quarterly Results

Unaudited Quarterly Results	12 Months Ended
	Jun. 30, 2015
Unaudited Quarterly Results [Abstract]
Unaudited Quarterly Results	(26) Unaudited Quarterly Results Unaudited quarterly results for the years ended June 30, 2015, 2014 and 2013 were as follows: First Second Third Fourth Quarter Quarter Quarter Quarter (Unaudited) 2015: Net sales $ 206,083 198,016 194,653 202,021 Operating income 21,901 17,247 15,849 6,894 Net income attributable to Globe Specialty Metals, Inc. 11,702 9,973 7,723 1,922 Basic earnings per common share 0.16 0.14 0.10 0.03 Diluted earnings per common share 0.16 0.13 0.10 0.03 2014: Net sales $ 172,994 178,406 196,057 205,360 Operating (loss) income (4,424) (7,375) 7,739 18,870 Net (loss) income attributable to Globe Specialty Metals, Inc. (6,852) 20,768 1,561 6,226 Basic (loss) earnings per common share (0.09) 0.28 0.02 0.08 Diluted (loss) earnings per common share (0.09) 0.28 0.02 0.08 2013: Net sales $ 200,708 179,940 195,845 181,057 Operating (loss) income (5,652) 22,556 (42,646) 16,795 Net (loss) income attributable to Globe Specialty Metals, Inc. (5,705) 15,068 (40,135) 9,744 Basic (loss) earnings per common share (0.08) 0.20 (0.53) 0.13 Diluted (loss) earnings per common share (0.08) 0.20 (0.53) 0.13 Due to rounding differences, the sum of the quarterly amounts may not add precisely to the annual amounts.

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2015
Summary of Significant Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	a. Basis of Presentation and Principles of Consolidation The Company’s consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and present the accounts of Globe Specialty Metals, Inc. and its consolidated subsidiaries. When the Company does not have a controlling interest in an entity, but exerts significant influence over the entity, the Company applies the equity method of accounting. For investments in which the Company does not have significant influence, the cost method of accounting is used. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	b. Use of Estimates The Company prepares its consolidated financial statements in accordance with U.S. GAAP. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as the disclosure of contingent assets and liabilities. The Company based its estimates and judgments on historical experience, known or expected trends and other factors that are believed to be reasonable under the circumstances. Actual results may differ from these estimates.
Revenue Recognition	c. Revenue Recognition Revenue is recognized when title, ownership, and risk of loss pass to the customer, all of which occurs when products are delivered to the Company’s customers or when products are picked up by a customer or a customer’s carrier. Written sales terms, including the selling price, are determined at the time of shipment or delivery. We have not experienced significant credit issues with our customers.
Foreign Currency Translation	d. Foreign Currency Translation The determination of the functional currency for the Company’s subsidiaries is made based on appropriate economic factors, including the currency in which the subsidiary sells its products, the market in which the subsidiary operates, and the currency in which the subsidiary’s financing is denominated. Based on these factors, management has determined that the U.S. dollar is the functional currency for Globe Metales. The functional currency for Yonvey is the Chinese renminbi. Yonvey’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. The functional currency for Quebec Silicon is the Canadian dollar. Quebec Silicon’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. The functional currency for Siltech is the South African rand. Siltech’s assets and liabilities are translated using current exchange rates in effect at the balance sheet date and for income and expense accounts using average exchange rates. Resulting translation adjustments are reported as a separate component of stockholders’ equity. Translation gains and losses are recognized on transactions in currencies other than the subsidiary’s functional currency and included in the consolidated statement of operations for the period in which the exchange rates changed.
Cash and Cash Equivalents	e. Cash and Cash Equivalents Cash equivalents consist of highly liquid investments that are readily convertible into cash. Securities with contractual maturities of three months or less, when purchased, are cash equivalents. The carrying amount of these securities approximates fair value because of the short-term maturity of these instruments.
Receivables Sale Arrangement	f. Receivables Sale Arrangement The Company has the option to sell certain accounts receivables up to a cap of $35,000 on a non-recourse basis to an unrelated financial institution under a receivables purchase arrangement in the U.S. An amendment to the agreement was entered into in the fourth quarter which raised the cap to $55,000. The Company accounts for this transaction as a sale of receivables, removes receivables sold from its financial statements, and records cash proceeds when received by the Company as cash provided by operating activities in the Consolidated Statement of Cash Flows. The receivables are sold at a discount rate of 30 day LIBOR plus 1.25% per annum discounted upfront on the date of purchase. The Company entered into the arrangement in the second quarter of fiscal 2015. The arrangement has a term of twelve months and will be renewed for an additional twelve month period in the absence of written termination notice provided by the Company no later than sixty days prior to the termination date of the arrangement. During fiscal 2015, the Company sold $175,592 of receivables under the arrangement and as of June 30, 2015, $46,567 of receivables was outstanding with the financial institution.
Marketable Securities	g. Marketable Securities Marketable securities consist of trading and available-for-sale securities. Trading securities are bought and held principally for the purpose of selling them in the near term. Available-for-sale securities are not classified as either trading securities or as held-to-maturity securities. Unrealized holding gains and losses for trading securities are included in earnings. Unrealized holding gains and losses for available-for-sale securities are excluded from earnings and reported in other comprehensive income until realized.
Inventories	h. Inventories Cost of inventories is determined by the first-in, first-out method or, in certain cases, by the average cost method. Inventories are valued at the lower of cost or market value. Circumstances may arise (e.g., reductions in market pricing, obsolete, slow moving or defective inventory) that require the carrying amount of our inventory to be written down to net realizable value. The Company estimates market and net realizable value based on current and future expected selling prices, as well as expected costs to complete, including utilization of parts and supplies in the manufacturing process.
Property, Plant, and Equipment	i. Property, Plant, and Equipment Property, plant, and equipment are recorded at cost. Depreciation is calculated using the straight-line method based on the estimated useful lives of assets. The estimated useful lives of property, plant, and equipment are as follows: Range of Useful Lives Asset Type: Land improvements and land use rights 20 to 36 years Buildings 35 to 40 years Manufacturing equipment 5 to 25 years Furnaces 10 to 20 years Other 2 to 10 years Costs that do not extend the life of an asset, materially add to its value, or adapt the asset to a new or different use are considered repair and maintenance costs and expensed as incurred. Costs for mineral properties, which are incurred to expand capacity of operating mines, are capitalized and charged to operations based on the units-of production method over the estimated proven and probable reserve tons and based on the average useful life of the mine, respectively. Mine development costs include costs incurred for site preparation and development of the mines during the development stage, and are charged to operations on a straight-line basis over the estimated operational life of the mine.
Business Combinations	j. Business Combinations When the Company acquires a business, the purchase price is allocated based on the fair value of tangible assets and identifiable intangible assets acquired, and liabilities assumed. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Goodwill as of the acquisition date is measured as the residual of the excess of the consideration transferred, plus the fair value of any noncontrolling interest in the acquiree at the acquisition date, over the fair value of the identifiable net assets acquired. If the fair value of the net assets acquired exceeds the purchase price, the resulting bargain purchase is recognized as a gain in the consolidated statement of operations. Prior to the adoption of ASC Subtopic 805-10, Business Combinations
Goodwill and Other Intangible Assets	k. Goodwill and Other Intangible Assets Impairment testing for goodwill is performed at the reporting unit level. In accordance with ASC Topic 350, Intangibles — Goodwill and Other Impairment is the condition that exists when the carrying amount of goodwill exceeds its implied fair value. The implied fair value of goodwill is determined in the same manner as the amount of goodwill recognized in a business combination. The excess of the fair value of a reporting unit over the amounts assigned to its assets and liabilities is the implied fair value of goodwill. An impairment loss would be recognized when the carrying amount of goodwill exceeds the implied fair value of goodwill of the reporting unit. Refer to note 3 (Business Combinations) and note 7 (Goodwill and Other Intangibles) for additional information. Trade names have indefinite lives and are not amortized but rather tested annually for impairment and written down to fair value as required.
Impairment of Long-Lived Assets	l. Impairment of Long-Lived Assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Impairment losses are recorded on long-lived assets used in operations when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets' carrying amounts. The impairment loss is measured by comparing the fair value of the asset to its carrying amount. The Company considers various factors in determining whether an impairment test is necessary, including among other things, a significant or prolonged deterioration in operating results and projected cash flows, significant changes in the extent or manner in which assets are used, technological advances with respect to assets which would potentially render them obsolete, our strategy and capital planning, and the economic climate in the markets we serve. When estimating future cash flows and if necessary, fair value, the Company makes judgments as to the expected utilization of assets and estimated future cash flows related to those assets, considering historical and anticipated future results, general economic and market conditions, the impact of planned business and operational strategies and other information available at the time the estimates are made.
Mineral Reserves	m. Mineral Reserves Mineral reserves are recorded at fair value at the date of acquisition. Depletion of mineral reserves is computed using the units-of-production method utilizing only proven and probable reserves (as adjusted for recoverability factors) in the depletion base. Mineral reserves are included in Property, plant and equipment, net of accumulated depreciation, depletion and amortization in the consolidated balance sheets.
Exploration Costs	n. Exploration Costs Costs incurred to maintain current production capacity at a mine and exploration expenditures are charged to operating costs as incurred, including costs related to drilling and study costs incurred.
Share-Based Compensation	o. Share-Based Compensation The Company recognizes share-based compensation expense based on the estimated grant date fair value of share-based awards using a Black-Scholes option pricing model. Prior to vesting, cumulative compensation cost equals the proportionate amount of the award earned to date. The Company has elected to treat each award as a single award and recognize compensation cost on a straight-line basis over the requisite service period of the entire award. If the terms of an award are modified in a manner that affects both the fair value and vesting of the award, the total amount of remaining unrecognized compensation cost (based on the grant-date fair value) and the incremental fair value of the modified award are recognized over the amended vesting period. On August 17, 2013, the Company amended certain outstanding options pursuant to the Company’s 2006 Employee, Director and Consultant Stock Plan, to permit these options alternatively to be settled for cash or exercised for the issuance of shares, at the election of the option holder. This modification changed its classification from equity awards to liability awards and the fair value of the liability awards is remeasured at the end of each reporting period through settlement. Refer to note 19 (Share-Based Compensation) for further information on the Company’s accounting for share-based compensation.
Income Taxes	p. Income Taxes The Company’s deferred tax assets and liabilities are determined based on temporary differences between financial reporting and tax bases of assets and liabilities, and applying enacted tax rates expected to be in effect for the year in which the differences are expected to reverse. If management determines it is more-likely-than-not that a portion of the Company’s deferred tax assets will not be realized, a valuation allowance is recorded. The provision for income taxes is based on domestic (including federal and state) and international statutory income tax rates in the tax jurisdictions where the Company operates, permanent differences between financial reporting and tax reporting, and available credits and incentives. Significant judgment is required in determining income tax provisions and tax positions. The Company may be challenged upon review by the applicable taxing authorities, and positions taken may not be sustained. All, or a portion of, the benefit of income tax positions are recognized only when the Company has made a determination that it is more-likely-than-not that the tax position will be sustained based upon the technical merits of the position. For tax positions that are determined as more-likely-than-not to be sustained, the tax benefit recognized is the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. The accounting for uncertain income tax positions requires consideration of timing and judgments about tax issues and potential outcomes, and is a subjective estimate. In certain circumstances, the ultimate outcome of exposures and risks involves significant uncertainties. If actual outcomes differ materially from these estimates, they could have a material impact on the Company’s results of operations and financial condition. Interest and penalties related to uncertain tax positions are recognized in income tax expense.
Financial Instruments	q. Financial Instruments The Company accounts for derivatives and hedging activities in accordance with ASC Topic 815, Derivatives and Hedging
Recent Accounting Pronouncements	r. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board issued a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Companies may use either a full retrospective or a modified retrospective approach to adopt this new guidance and management is currently evaluating which transition approach to use. In July 2015, the FASB deferred the required implementation date one year to the first quarter of calendar 2018 but also agreed to allow companies to adopt the standard at the original effective date of 2017. Accordingly, we will adopt this new guidance beginning in fiscal 2019. We are currently evaluating the impact of this guidance on our consolidated results of operations, financial position and cash flows. In April 2015, the FASB issued an accounting standards update relating to the presentation of debt issuance costs. The accounting update requires companies to present debt issuance costs related to a recognized debt liability presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The guidance is effective beginning fiscal 2017. In June 2015, the SEC clarified that revolver arrangement costs are not in the scope of the new guidance. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In July 2015, the FASB issued an accounting standards update relating to the measurement of inventory. The accounting update changes the subsequent measurement guidance from the lower of cost or market to the lower of cost and net realizable value for inventory measured using first-in, first-out (FIFO) or average cost. The guidance is effective beginning fiscal 2018. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2015
Summary of Significant Accounting Policies [Abstract]
Estimated Useful Lives of Property, Plant and Equipment	The estimated useful lives of property, plant, and equipment are as follows: Range of Useful Lives Asset Type: Land improvements and land use rights 20 to 36 years Buildings 35 to 40 years Manufacturing equipment 5 to 25 years Furnaces 10 to 20 years Other 2 to 10 years

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Purchase Price Allocation	The purchase price of $4,000 was allocated as follows: Amounts Recognized as of Acquisition Date Assets Current assets $ 2,399 Property, plant and equipment 46,267 Total assets acquired $ 48,666 Liabilities Accounts payable $ 423 Accrued expenses 206 Deferred tax liabilities 13,346 Other long-term liabilities 1,153 Total liabilities assumed $ 15,128 Net assets acquired 33,538 Consideration paid 4,000 Gain on bargain purchase $ 29,538

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Jun. 30, 2015
Inventories [Abstract]
Schedule of Inventory	Inventories comprise the following at June 30: 2015 2014 Finished goods $ 46,793 27,406 Work in process 5,120 5,120 Raw materials 53,105 33,843 Parts and supplies 14,714 14,555 Total $ 119,732 80,924

Prepaid Expenses and Other Cu40

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Jun. 30, 2015
Prepaid Expenses and Other Current Assets [Abstract]
Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets comprise the following at June 30: 2015 2014 Value added and other non-income tax receivables $ 5,965 3,376 Income tax receivables 2,522 6,786 Bond trade settlement receivable — 4,163 Other 12,014 11,934 Total $ 20,501 26,259

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	12 Months Ended
	Jun. 30, 2015
Property, Plant, and Equipment [Abstract]
Property, Plant, and Equipment, Net	Property, plant, and equipment, net is comprised of the following at June 30: 2015 2014 Land, land improvements, and land use rights $ 12,530 13,615 Buildings and improvements 97,167 89,222 Machinery and equipment 241,949 217,358 Furnaces 228,423 208,368 Mineral reserves 55,843 55,843 Mine development 10,291 9,317 Other 22,483 14,712 Construction in progress 12,887 53,753 Property, plant, and equipment, gross 681,573 662,188 Less accumulated depreciation, depletion and amortization (226,804) (193,019) Property, plant, and equipment, net $ 454,769 469,169

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Jun. 30, 2015
Goodwill and Other Intangibles [Abstract]
Changes in Carrying Amount of Goodwill, by Reportable Segment	Changes in the carrying amount of goodwill, by reportable segment, during the years ended June 30 are as follows: Globe GMI Metales Solsil Other Total Balance at June 30, 2013 Goodwill $ 34,734 14,313 57,656 7,260 113,963 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) 34,734 8,313 — 130 43,177 Goodwill impairment — — — — — Purchase price allocation adjustments 166 — — — 166 Step acquisition — — — — — Foreign exchange rate changes — — — — — Balance at June 30, 2014 Goodwill 34,900 14,313 57,656 7,260 114,129 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) 34,900 8,313 — 130 43,343 Goodwill impairment — — — — — Purchase price allocation adjustments — — — — — Step acquisition — — — — — Foreign exchange rate changes — — — — — Balance at June 30, 2015 Goodwill 34,900 14,313 57,656 7,260 114,129 Accumulated impairment loss — (6,000) (57,656) (7,130) (70,786) $ 34,900 8,313 — 130 43,343

Investments in Unconsolidated43

Investments in Unconsolidated Affiliates (Tables)	12 Months Ended
	Jun. 30, 2015
Investments in Unconsolidated Affiliates [Abstract]
Investments in Unconsolidated Affiliates	Investments in unconsolidated affiliates comprise the following at June 30: Ownership Interest 2015 2014 Inversora Nihuiles S.A.(a) 9.75% $ 3,067 3,067 Inversora Diamante S.A.(b) 8.40% 2,906 2,906 Total $ 5,973 5,973 (a) This entity owns a 51% interest in Hidroelectrica Los Nihuiles S.A., which is a hydroelectric company in Argentina. (b) This entity owns a 59% interest in Hidroelectrica Diamante S.A., which is a hydroelectric company in Argentina.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jun. 30, 2015
Debt [Abstract]
Short-term Debt	Short-term debt comprises the following: Weighted Outstanding Average Unused Balance Interest Rate Credit Line June 30, 2015: Type debt: Export financing $ 891 7.52% $ 2,989 Other 62 12.42% — Total $ 953 $ 2,989 June 30, 2014: Type debt: Export financing $ — NA $ 9,208 Other 59 14.47% — Total $ 59 $ 9,208
Summary of Revolving Credit Agreements	A summary of the Company’s revolving credit agreements at June 30, 2015 is as follows: Weighted Outstanding Average Unused Total Balance Interest Rate Commitment Commitment Revolving multi-currency credit facility $ 100,000 1.66% $ 198,978 300,000 Revolving credit agreement — 5.00% 12,025 12,025
Other Long-term Debt	Other long-term debt comprises the following: Weighted Outstanding Average Unused Balance Interest Rate Credit Line Other $ 95 19.00% $ —

Accrued Expenses and Other Cu45

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Jun. 30, 2015
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities comprise the following at June 30: 2015 2014 Accrued wages, bonuses, and benefits $ 15,640 12,420 Accrued professional fees 5,225 1,183 Current portion of asset retirement obligations 4,092 125 Current portion of capital lease obligations 2,627 2,585 Accrued insurance 2,012 1,386 Accrued income taxes 1,502 3,153 Current portion of retained acquisition contingencies 750 812 Accrued property taxes 825 775 Deferred revenue 641 762 Deferred taxes 188 408 Acquired contract obligations — 3,696 Other 10,185 11,453 Total $ 43,687 38,758

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	12 Months Ended
	Jun. 30, 2015
Other Long-Term Liabilities [Abstract]
Other long-term liabilities	Other long-term liabilities comprise the following at June 30: 2015 2014 Pension and postretirement benefits liability $ 21,055 20,890 Asset retirement obligations 10,672 9,009 Liability classified stock awards 5,529 5,019 Retained acquisition contingencies 5,328 4,953 Capital lease obligations 4,566 7,231 Environmental remediation obligation 1,179 1,111 Other 4,276 2,413 Total $ 52,605 50,626

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Jun. 30, 2015
Derivative Instruments [Abstract]
Summary of Effect of Derivative Instruments on Consolidated Income Statements	The effect of the Company’s derivative instruments on the consolidated statements of operations is summarized in the following table: (Loss) Gain Recognized During the Years Ended June 30 Location 2015 2014 2013 of (Loss) Gain Foreign exchange forward and option contracts — (603) (701) Foreign exchange (loss) Power hedge — — 424 Cost of goods sold

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2015
Benefit Plans [Abstract]
Reconciliation of Benefit Obligations, Plan Assets, and Funded Status of Defined Benefit Plans	Benefit Obligations and Funded Status Pension Plans Nonpension Postretirement Plan 2015 2014 2015 2014 Change in benefit obligations: Benefit obligations at beginning of year $ 62,525 59,542 $ 9,065 13,316 Interest cost 2,422 2,623 360 518 Service cost 413 414 339 640 Plan curtailments — — — (5,831) Plan amendments 307 — — — Employee contributions 43 52 — — Actuarial loss (gain) 1,939 3,063 (417) 758 Benefits paid (2,802) (2,789) (116) (109) Net transfer in 229 — — — Effect of exchange rate changes (3,823) (380) (1,317) (227) Benefit obligations at end of year $ 61,253 62,525 $ 7,914 9,065 Change in plan assets: Fair value of plan assets at beginning of year $ 50,500 43,407 $ — — Actual return on plan assets 1,952 7,419 — — Employer contributions 1,187 2,862 116 109 Employee contributions 43 52 — — Benefits paid (2,802) (2,789) (116) (109) Expenses paid (240) (209) — — Net transfer in 80 — — — Effect of exchange rate changes (2,763) (242) — — Fair value of plan assets at end of year $ 47,957 50,500 $ — — Funded status at end of year: Fair value of plan assets $ 47,957 50,500 $ — — Benefit obligations 61,253 62,525 7,914 9,065 Funded status $ (13,296) (12,025) $ (7,914) (9,065) Amounts recognized in the consolidated balance sheet consist of: Noncurrent liability $ (13,296) (12,025) $ (7,715) (8,865) Current liability — — (199) (200) Accumulated other comprehensive loss 12,253 9,310 277 779
Components of Net Periodic Pension Expense	Net Periodic Pension Expense Pension Plans Nonpension Postretirement Plans 2015 2014 2013 2015 2014 2013 Interest cost $ 2,422 2,623 2,571 $ 360 518 617 Service cost 413 414 893 339 640 1,172 Expected return on plan assets (3,146) (2,791) (2,516) — — — Amortization of net loss 702 1,054 1,608 — — — Curtailment gain — — — — (5,831) — Net periodic pension expense $ 391 1,300 2,556 $ 699 (4,673) 1,789
Assumptions Used to Determine Benefit Obligations and Net Periodic Expense	Assumptions and Other Data Pension Plans Nonpension Postretirement Plans 2015 2014 2015 2014 Discount rate 4.00 to 4.15% 4.00 to 4.30% 4.20% 4.40% The assumptions used to determine net periodic expense for the Company’s defined benefit pension plans for years ended June 30, 2015, 2014, and 2013 are as follows: Pension Plans Nonpension Postretirement Plans 2015 2014 2013 2015 2014 2013 Discount rate 4.00 to 4.30% 3.75 to 4.75% 3.50 to 5.00% 4.40% 4.85% 5.10% Expected return on plan assets 5.70 to 7.00% 5.70 to 7.00% 5.70 to 7.00% NA NA NA
Expected Future Benefit Payments	The following reflects the gross benefit payments that are expected to be paid for the benefit plans for the years ended June 30: Nonpension Postretirement Pension Plans Plans 2016 $ 2,889 $ 199 2017 3,097 227 2018 3,194 241 2019 3,284 249 2020 3,345 253 Years 2021-2025 17,058 1,410
Allocation of Plan Assets	The Company’s overall strategy is to invest in high-grade securities and other assets with a limited risk of market value fluctuation. In general, the Company’s goal is to maintain the following allocation ranges: Equity securities 40 to 50% Fixed income securities 40 to 50% Real estate 5 to 10%
Schedule of Benefit Plan Assets, Fair Value Hierarchy	The fair values of the Company’s pension plan assets at June 30: Quoted Prices in Active Markets for Identical Assets (Level 1) 2015 2014 Cash and cash equivalents $ 818 637 Equity securities: Domestic equity mutual funds 5,380 5,563 International equity mutual funds 4,707 4,890 Commingled domestic equity funds 3,634 4,036 Commingled international equity funds 8,849 10,255 Fixed income securities: Fixed income mutual funds 10,556 11,059 Commingled fixed income funds 12,813 12,857 Real estate mutual funds 1,200 1,203 Total $ 47,957 50,500

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2015
Income Taxes [Abstract]
Schedule of Income (Loss) Provision for Income Taxes and Noncontrolling Interest	The sources of income (loss) before provision for income taxes and income attributable to noncontrolling interest for the years ended June 30, 2015, 2014, and 2013 were as follows: 2015 2014 2013 U.S. operations $ 54,999 1,822 17,541 Non-U.S. operations 1,279 31,789 (34,616) Total $ 56,278 33,611 (17,075)
Schedule of Components of Current and Deferred Income Tax Expense	The components of current and deferred income tax expense (benefit) are as follows: 2015 2014 2013 Current: Federal $ 13,402 (1,502) 3,120 State 1,355 1,428 696 Foreign 2,777 4,048 2,459 Total current 17,534 3,974 6,275 Deferred: Federal 2,942 (1,807) 2,440 State 642 3,875 (5,568) Foreign 533 1,663 (413) Total deferred 4,117 3,731 (3,541) Total provision for income taxes $ 21,651 7,705 2,734
Effective of Income Tax Rate Reconciliation	The following is a reconciliation, stated in percentage, of the U.S. statutory federal income tax rate to our effective tax rate for the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Federal statutory rate 35.0% 35.0% 35.0% State taxes, net of federal benefit 0.6 2.5 7.5 Bargain purchase gain — (30.8) — Foreign rate differential (0.5) 0.5 (9.0) Change in valuation allowance 2.0 16.0 3.4 Goodwill and other asset impairments — — (57.4) Domestic production activities deduction (1.8) — 1.7 Step acquisition — — 9.6 Foreign non-deductible loss — 8.5 (10.9) Uncertain tax position changes (0.3) (1.0) (4.0) Noncontrolling interest (2.0) (4.9) 5.3 Other 5.5 (2.9) 2.8 Effective tax rate 38.5% 22.9% (16%)
Schedule of Components of Deferred Tax Assets and Deferred Tax Liabilities	Significant components of the Company’s deferred tax assets and deferred tax liabilities at June 30, 2015 and 2014 consist of the following: 2015 2014 Deferred tax assets: Inventories $ 1,955 1,173 Accounts receivable 197 530 Accruals 16,202 8,845 Deferred revenue 12 52 Net operating losses and other carryforwards 23,501 24,114 Share-based compensation 7,051 8,414 Other 3,033 3,804 Gross deferred tax assets 51,951 46,932 Valuation allowance (20,934) (18,531) Net deferred tax assets 31,017 28,401 Deferred tax liabilities: Fixed assets (71,737) (69,929) Prepaid expenses (1,010) (1,482) Other (2,142) (300) Total deferred tax liabilities (74,889) (71,711) Net deferred tax liabilities $ (43,872) (43,310)
Summary of Net Operating Loss Carryforwards (NOLs)	A portion of the Company’s net operating loss carry forwards (NOLs) are subject to various limitations and expire at various dates in the future as follows: Amount Expires Federal $ 18,386 2025 through 2026 State 303,945 2015 through 2034 Foreign 20,405 2015 through 2035
Summary of Deferred Tax Asset Valuation Allowance	The total valuation allowance at June 30, 2015 and 2014 is $20,934, and $18,531, respectively, relates to the following: 2015 2014 Federal NOLs $ 4,467 4,467 State NOLs 4,177 861 Foreign NOLs 8,621 9,201 Federal credits 236 236 State credits 3,433 3,766 Total $ 20,934 18,531
Schedule of Unrecognized Tax Benefits, Excluding Interest and Penalties Rollforward	The following is a tabular reconciliation of the total amount of unrecognized tax benefits for the year, excluding interest and penalties: 2015 2014 2013 Balance at the beginning of the year $ 795 1,115 522 Gross increases for prior year tax positions 210 — 659 Gross decreases for prior year tax positions — — — Lapse in statute of limitations (307) (320) (66) Balance at the end of the year $ 698 795 1,115

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2015
Commitments and Contingencies [Abstract]
Summarizes of Contractual Commitments by Period	The following table summarizes our contractual commitments by period: 2021 and Total 2016 2017 2018 2019 2020 Beyond Long-term debt obligations $ 101,048 953 50 45 100,000 — — Power commitments 17,794 17,794 — — — — — Purchase commitments 42,646 31,486 11,160 — — — — Operating lease obligations 8,472 2,247 1,473 575 528 524 3,125 Capital lease obligations 7,193 2,627 2,389 408 497 435 837

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Jun. 30, 2015
Earnings (Loss) Per Share [Abstract]
Reconciliation of Amounts used to Compute Basic and Diluted Earnings (Loss) per Common Share	The reconciliation of the amounts used to compute basic and diluted earnings (loss) per common share for the years ended June 30, 2015, 2014, and 2013, is as follows: 2015 2014 2013 Basic earnings (loss) per share computation Numerator: Net income (loss) attributable to Globe Specialty Metals, Inc. $ 31,320 21,703 (21,028) Denominator: Weighted average basic shares outstanding 73,750,764 74,674,466 75,206,656 Basic earnings (loss) per common share $ 0.42 0.29 (0.28) Diluted earnings (loss) per share computation Numerator: Net income (loss) attributable to Globe Specialty Metals, Inc. $ 31,320 21,703 (21,028) Denominator: Weighted average basic shares outstanding 73,750,764 74,674,466 75,206,656 Effect of dilutive securities 141,066 118,551 — Weighted average diluted shares outstanding 73,891,830 74,793,017 75,206,656 Diluted earnings (loss) per common share $ 0.42 0.29 (0.28)
Potentially Anti-dilutive Common Shares Excluded from Calculation of Diluted Earnings	The following potential common shares were excluded from the calculation of diluted earnings (loss) per common share because their effect would be anti-dilutive: 2015 2014 2013 Stock options and restricted stock grants 103,630 172,500 367,554

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2015
Share-Based Compensation [Abstract]
Summary of Changes in Options Outstanding	A summary of the changes in options outstanding under the Stock Plan for the years ended June 30, 2015, 2014, and 2013 is presented below: Weighted- Average Weighted- Remaining Aggregate Number of Average Contractual Intrinsic Options Exercise Price Term in Years Value Outstanding as of June 30, 2012 4,365,397 $ 8.10 Granted 13,188 13.43 Exercised (583,333) 4.03 Forfeited and expired — — Outstanding as of June 30, 2013 3,795,252 $ 8.74 Outstanding as of June 30, 2013 3,795,252 $ 8.74 Granted 439,211 15.82 Forfeited and converted to SARs (2,447,500) 4.06 Exercised (45,521) 9.10 Forfeited and expired (26,446) 19.94 Outstanding as of June 30, 2014 1,714,996 $ 17.05 Outstanding as of June 30, 2014 1,714,996 $ 17.05 Granted 31,130 17.46 Exercised (56,990) 11.92 Forfeited and expired (100,000) 19.87 Outstanding as of June 30, 2015 1,589,136 $ 17.06 1.97 $ 3,012 Exercisable as of June 30, 2015 1,307,745 $ 17.36 1.75 $ 2,241
Assumptions Used to Estimate Fair Value of Stock Option Awards Using Black-Scholes Model	The following assumptions were used to estimate the fair value of stock option awards granted during the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Risk-free interest rate 1.56 to 1.74% 0.64 to 1.64% 0.15 to 1.38% Expected dividend yield 1.46 to 1.92% 1.41 to 2.21% 2.30% Expected volatility 40.42 to 44.25% 41.07 to 47.79% 29.89 to 59.90% Expected term (years) 5.00 3.00 to 5.00 0.83 to 5.31

Fair Value Measures (Tables)

Fair Value Measures (Tables)	12 Months Ended
	Jun. 30, 2015
Fair Value Measures [Abstract]
Summary of Assets Measured at Fair Value on Recurring Basis	The following table summarizes assets measured at fair value on a recurring basis at June 30, 2015: Total Level 1 Marketable securities $ 4,965 4,965 Total assets at fair value $ 4,965 4,965 The following table summarizes assets measured at fair value on a recurring basis at June 30, 2014. Total Level 1 Marketable securities $ 10,399 10,399 Total assets at fair value $ 10,399 10,399

Operating Segments (Tables)

Operating Segments (Tables)	12 Months Ended
	Jun. 30, 2015
Operating Segments [Abstract]
Consolidated Net Sales by Product Line	The following presents the Company’s consolidated net sales by product line for the years ended June 30: 2015 2014 2013 Silicon metal $ 450,788 377,954 422,564 Silicon-based alloys 261,258 282,998 248,276 Other 88,727 91,865 86,710 Total $ 800,773 752,817 757,550
Summarized Financial Information for Reportable Segments	Summarized financial information for our reportable segments as of, and for, the years ended June 30, 2014, 2013, and 2012 are shown in the following tables: 2015 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 753,905 43,222 114,733 2 (2,085) 112,768 610,592 (36,813) Globe Metales 44,945 2,463 1,351 74 (733) (18) 67,167 (1,535) Solsil — — (81) — — (45) 15,566 — Corporate — 288 (45,533) 12 (1,522) (46,005) 320,421 (334) Other 36,308 5,056 (8,565) 179 (3) (10,405) 98,469 (11,337) Eliminations (34,385) — (14) — — (17) (282,854) — $ 800,773 51,029 61,891 267 (4,343) 56,278 829,361 (50,019) 2014 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 697,403 39,069 67,047 26 (2,760) 64,237 657,714 (42,139) Globe Metales 51,213 2,414 5,746 18 (676) 2,671 72,529 (3,680) Solsil — — (42) — — (33) 15,633 — Corporate — 249 (53,680) 16 (4,586) (28,523) 385,442 (653) Other 12,651 2,090 (3,981) 7 — (4,461) 76,758 (603) Eliminations (8,450) — (280) — — (280) (362,950) — $ 752,817 43,822 14,810 67 (8,022) 33,611 845,126 (47,075) 2013 Net Sales Depreciation and Amortization Operating Income (Loss) Interest Income Interest Expense (1) Income (Loss) Before Income Taxes Total Assets Capital Expenditures GMI $ 702,275 40,274 73,615 1 (4,107) 68,274 686,609 (35,543) Globe Metales 51,266 2,009 (2,388) 781 (1,168) (3,751) 74,517 (1,168) Solsil — 362 (21,147) — — (21,147) 15,347 (30) Corporate — 388 (47,634) 37 (1,611) (48,984) 419,504 (7,603) Other 11,641 2,075 (10,762) 1 (1) (10,837) 28,615 (165) Eliminations (7,632) — (631) — — (630) (352,969) — $ 757,550 45,108 (8,947) 820 (6,887) (17,075) 871,623 (44,509)
Net Sales by Geographical Region	Net sales are attributed to geographic regions based upon the location of the selling unit. Net sales by geographic region for the years ended June 30, 2015, 2014, and 2013 consist of the following: 2015 2014 2013 United States $ 635,941 628,673 590,011 Argentina 32,240 43,804 44,240 Canada 112,532 68,091 112,073 China 188 283 255 Poland 12,147 11,966 10,971 South Africa 7,725 — — Total $ 800,773 752,817 757,550
Long-lived Assets by Geographical Region	Long-lived assets by geographical region at June 30, 2015, 2014, and 2013 consist of the following: 2015 2014 2013 United States $ 341,023 334,559 328,326 Argentina 24,684 25,611 24,344 Canada 73,290 90,071 95,591 China 13,293 15,029 16,955 Poland 741 813 885 South Africa 45,558 46,906 — Total $ 498,589 512,989 466,101
Summary of Major Customers and Respective Percentages of Consolidated Net Sales	The following is a summary of the Company’s major customers and their respective percentages of consolidated net sales for the years ended June 30, 2015, 2014, and 2013: 2015 2014 2013 Dow Corning 21% 18% 19% All other customers 79% 82% 81% Total 100% 100% 100%

Unaudited Quarterly Results (Ta

Unaudited Quarterly Results (Tables)	12 Months Ended
	Jun. 30, 2015
Unaudited Quarterly Results [Abstract]
Unaudited Quarterly Results	Unaudited quarterly results for the years ended June 30, 2015, 2014 and 2013 were as follows: First Second Third Fourth Quarter Quarter Quarter Quarter (Unaudited) 2015: Net sales $ 206,083 198,016 194,653 202,021 Operating income 21,901 17,247 15,849 6,894 Net income attributable to Globe Specialty Metals, Inc. 11,702 9,973 7,723 1,922 Basic earnings per common share 0.16 0.14 0.10 0.03 Diluted earnings per common share 0.16 0.13 0.10 0.03 2014: Net sales $ 172,994 178,406 196,057 205,360 Operating (loss) income (4,424) (7,375) 7,739 18,870 Net (loss) income attributable to Globe Specialty Metals, Inc. (6,852) 20,768 1,561 6,226 Basic (loss) earnings per common share (0.09) 0.28 0.02 0.08 Diluted (loss) earnings per common share (0.09) 0.28 0.02 0.08 2013: Net sales $ 200,708 179,940 195,845 181,057 Operating (loss) income (5,652) 22,556 (42,646) 16,795 Net (loss) income attributable to Globe Specialty Metals, Inc. (5,705) 15,068 (40,135) 9,744 Basic (loss) earnings per common share (0.08) 0.20 (0.53) 0.13 Diluted (loss) earnings per common share (0.08) 0.20 (0.53) 0.13

Organization and Business Ope56

Organization and Business Operations (Details) - shares	Nov. 05, 2009	Jun. 30, 2015	Nov. 21, 2013	Jan. 31, 2013	Jun. 13, 2012	Nov. 28, 2008	May. 15, 2008	Feb. 29, 2008
Subsidiary or Equity Method Investee [Line Items]
Number of shares issuable for exchange (in shares)		98,078,161
Conversion of stock (in shares)		1
Solsil [Member]
Subsidiary or Equity Method Investee [Line Items]
Percentage of business acquired (in hundredths)								81.00%
Subsequent ownership percentage (in hundredths)		97.25%
Ningxia Yonvey Coal [Member]
Subsidiary or Equity Method Investee [Line Items]
Ownership percentage (in hundredths)		98.00%
Percentage of business acquired (in hundredths)							58.00%
Additional ownership percentage acquired (in hundredths)				28.00%		12.00%
Quebec Silicon Limited Partnership [Member]
Subsidiary or Equity Method Investee [Line Items]
Percentage of business acquired (in hundredths)					51.00%
Silicon Technology (Pty), Ltd [Member]
Subsidiary or Equity Method Investee [Line Items]
Ownership percentage (in hundredths)			100.00%
Globe Metais [Member]
Subsidiary or Equity Method Investee [Line Items]
Percentage of business sold (in hundredths)	100.00%
WVA LLC [Member]
Subsidiary or Equity Method Investee [Line Items]
Percentage of business sold (in hundredths)	49.00%

Summary of Significant Accoun57

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015	Jun. 30, 2015
Receivables Sale Arrangement [Line Items]
Option to sell accounts receivables up to a cap		$ 55,000	$ 35,000
Receivables are sold at discount rate			LIBOR plus 1.25%
Number of days of discount rate			30 days
Term of sale arrangement	12 months
Renewal period of sale arrangement	12 months
Minimum period of termination notice	60 days
Options sold under arrangement		175,592	$ 175,592
Receivables outstanding with financial institution		$ 46,567	$ 46,567
LIBOR [Member]
Receivables Sale Arrangement [Line Items]
Variable interest rate (in hundredths)		1.25%	1.25%
Land Improvements and Land Use Rights [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			20 years
Land Improvements and Land Use Rights [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			36 years
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			35 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			40 years
Manufacturing Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			5 years
Manufacturing Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			25 years
Furnaces [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			10 years
Furnaces [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			20 years
Other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			2 years
Other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives			10 years

Business Combinations (Details)

Business Combinations (Details) $ in Thousands	Nov. 21, 2013USD ($)Mg	Dec. 20, 2012USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2013USD ($)
Step Acquisition [Abstract]
Step acquisition equity interest (in hundredths)		50.00%
Step acquisition total purchase Price		$ 5,000
Step acquisition purchase price, cash paid		4,500
Amount due under step acquisition		500
Gain on remeasurement of equity investment		1,655	$ 0	$ 0	$ 1,655
Step acquisition, goodwill amount		$ 3,371	0	0
Liabilities [Abstract]
Gain on bargain purchase			$ 0	$ 29,538	$ 0
Silicon Technology (Pty), Ltd [Member]
Business Acquisition [Abstract]
Percentage of interest acquired (in hundredths)	100.00%
Annual production capacity of acquiree | Mg	45,000
Percentage of increase in annual capacity due to opportunistic acquisition (in hundredths)	30.00%
Assets [Abstract]
Current assets	$ 2,399
Property, plant and equipment	46,267
Total assets acquired	48,666
Liabilities [Abstract]
Accounts payable	423
Accrued expenses	206
Deferred tax liabilities	13,346
Other long-term liabilities	1,153
Total liabilities assumed	15,128
Net assets acquired	33,538
Consideration paid	4,000
Gain on bargain purchase	$ 29,538

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Inventories [Abstract]
Finished goods	$ 46,793	$ 27,406
Work in process	5,120	5,120
Raw materials	53,105	33,843
Parts and supplies	14,714	14,555
Total	119,732	80,924
Inventory valued using first-in, first-out method	107,992	73,894
Inventory valued using average cost method	11,740	7,030
Inventory write-downs	$ 1,109	$ 0	$ 1,922

Prepaid Expenses and Other Cu60

Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Prepaid Expenses and Other Current Assets [Abstract]
Value added and other non-income tax receivables	$ 5,965	$ 3,376
Income tax receivables	2,522	6,786
Bond trade settlement receivable	0	4,163
Other	12,014	11,934
Total	$ 20,501	$ 26,259

Property, Plant, and Equipmen61

Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	$ 681,573	$ 662,188
Less accumulated depreciation, depletion and amortization	(226,804)	(193,019)
Property, plant, and equipment, net	454,769	469,169
Depreciation [Abstract]
Depreciation, depletion and amortization expense	51,781	44,973	$ 46,621
Depreciation, depletion and amortization expense recorded in cost of goods sold	50,794	43,902	45,543
Depreciation, depletion and amortization expense recorded in selling, general and administrative expenses	987	1,071	1,078
Capitalized interest	0	103	$ 9
Land, Land Improvements, and Land Use Rights [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	12,530	13,615
Buildings and Improvements [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	97,167	89,222
Machinery and Equipment [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	241,949	217,358
Furnaces [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	228,423	208,368
Mineral Reserves [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	55,843	55,843
Mine Development [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	10,291	9,317
Other [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	22,483	14,712
Construction in Progress [Member]
Property, plant and equipment, net [Abstract]
Property, plant, and equipment, gross	$ 12,887	$ 53,753

Goodwill and Other Intangible62

Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands	Dec. 20, 2012	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 114,129	$ 113,963
Accumulated impairment loss		(70,786)	(70,786)
Goodwill, net		43,343	43,177
Goodwill impairment		0	0
Purchase price allocation adjustments		0	166
Step acquisition	$ 3,371	0	0
Foreign exchange rate changes		0	0
Goodwill, ending balance		114,129	114,129
Accumulated impairment loss		(70,786)	(70,786)
Balance at end of period		43,343	43,343
Yonvey [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			7,775
Accumulated impairment loss			(7,130)
GMI [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		34,900	34,734
Accumulated impairment loss		0	0
Goodwill, net		34,900	34,734
Goodwill impairment		0	0
Purchase price allocation adjustments		0	166
Step acquisition		0	0
Foreign exchange rate changes		0	0
Goodwill, ending balance		34,900	34,900
Accumulated impairment loss		0	0
Balance at end of period		34,900	34,900
Globe Metales [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		14,313	14,313
Accumulated impairment loss		(6,000)	(6,000)
Goodwill, net		8,313	8,313
Goodwill impairment		0	0
Purchase price allocation adjustments		0	0
Step acquisition		0	0
Foreign exchange rate changes		0	0
Goodwill, ending balance		14,313	14,313
Accumulated impairment loss		(6,000)	(6,000)
Balance at end of period		8,313	8,313
Solsil [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		57,656	57,656
Accumulated impairment loss		(57,656)	(57,656)
Goodwill, net		0	0
Goodwill impairment		0	0
Purchase price allocation adjustments		0	0
Step acquisition		0	0
Foreign exchange rate changes		0	0
Goodwill, ending balance		57,656	57,656
Accumulated impairment loss		(57,656)	(57,656)
Balance at end of period		0	0
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		7,260	7,260
Accumulated impairment loss		(7,130)	(7,130)
Goodwill, net		130	130
Goodwill impairment		0	0
Purchase price allocation adjustments		0	0
Step acquisition		0	0
Foreign exchange rate changes		0	0
Goodwill, ending balance		7,260	7,260
Accumulated impairment loss		(7,130)	(7,130)
Balance at end of period		130	130
Trade Name [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite lived intangible assets		$ 477	$ 477

Impairment of Long-Lived Asse63

Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charge	$ 0	$ 0	$ 35,387
Solsil Long-Lived Assets [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charge			18,452
Nigeria Exploration Licenses [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charge			$ 16,935

Investments in Unconsolidated64

Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Equity method investment [Abstract]
Ownership interest in affiliate (in hundredths)		49.00%	49.00%	49.00%
Total		$ 5,973	$ 5,973
Hidroelectica Los Nihuiles S.A. [Member]
Equity method investment [Abstract]
Ownership interest in affiliate (in hundredths)	[1]	9.75%
Total	[1]	$ 3,067	3,067
Equity interest in affiliate (in hundredths)		51.00%
Hidroelectica Diamante S.A. [Member]
Equity method investment [Abstract]
Ownership interest in affiliate (in hundredths)	[2]	8.40%
Total	[2]	$ 2,906	$ 2,906
Equity interest in affiliate (in hundredths)		59.00%
[1]	This entity owns a 51% interest in Hidroelectrica Los Nihuiles S.A., which is a hydroelectric company in Argentina.
[2]	This entity owns a 59% interest in Hidroelectrica Diamante S.A., which is a hydroelectric company in Argentina.

Debt (Details)

Debt (Details) CAD in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2015CAD	Jun. 30, 2014USD ($)	Aug. 20, 2013USD ($)
Short-term Debt [Line Items]
Outstanding balance	$ 953		$ 59
Unused credit line	2,989		9,208
Export Financing [Member]
Short-term Debt [Line Items]
Outstanding balance	$ 891		0
Weighted average interest rate (in hundredths)	7.52%	7.52%
Unused credit line	$ 2,989		9,208
Period for short-term export financing, minimum	7 months
Period for short-term export financing, maximum	11 months
Other [Member]
Short-term Debt [Line Items]
Outstanding balance	$ 62		$ 59
Weighted average interest rate (in hundredths)	12.42%	12.42%	14.47%
Unused credit line	$ 0		$ 0
Revolving Multi-currency Credit Facility [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 100,000
Weighted average interest rate (in hundredths)	1.66%	1.66%
Unused commitment	$ 198,978
Total commitment	$ 300,000			$ 300,000
Sublimit for swing line loans				10,000
Term of credit facility	5 years
Sublimit letter of credit				$ 25,000
Line of credit facility, deferred financing costs			$ 3,354
Additional borrowing capacity	$ 198,978
Aggregate amount by which maximum borrowing capacity may be increased	$ 150,000
Expiration date	Aug. 20, 2018
Interest rate on borrowings under the credit agreement	(a) a base rate (the higher of (i) the U.S. federal funds rate plus 0.50% per annum, (ii) the Administrative Agent’s prime rate or (iii) a Eurocurrency Rate for loans with a one month interest period plus 1.00% per annum plus a margin ranging from 0.50% to 1.50% per annum (such margin determined by reference to the leverage ratio set forth in the credit agreement), or (b) the Eurocurrency Rate plus a margin ranging from 1.50% to 2.50% per annum (such margin determined by reference to the leverage ratio set forth in the credit agreement).
Letters of credit outstanding associated with landlord guarantees	$ 722
Letters of credit outstanding associated with economic development	$ 300
Revolving Multi-currency Credit Facility [Member] | Eurocurrency Rate [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings, basis spread on variable rate (in hundredths)	1.00%
Revolving Multi-currency Credit Facility [Member] | US Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings, basis spread on variable rate (in hundredths)	0.50%
Revolving Multi-currency Credit Facility [Member] | Minimum [Member] | Eurocurrency Rate [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings, basis spread on variable rate condition one (in hundredths)	0.50%
Interest rate on borrowings, basis spread on variable rate condition two (in hundredths)	1.50%
Revolving Multi-currency Credit Facility [Member] | Maximum [Member] | Eurocurrency Rate [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings, basis spread on variable rate condition one (in hundredths)	1.50%
Interest rate on borrowings, basis spread on variable rate condition two (in hundredths)	2.50%
Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 0
Weighted average interest rate (in hundredths)	5.00%	5.00%
Unused commitment	$ 12,025
Total commitment	$ 12,025
Quebec Silicon Acquisition Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Total commitment | CAD		CAD 15,000
Expiration date	Sep. 20, 2015
Interest rate on borrowings, basis spread on variable rate (in hundredths)	2.00%
Interest rate at period end (in hundredths)	5.00%	5.00%
Other Long-term Debt [Member]
Line of Credit Facility [Line Items]
Outstanding balance	$ 95
Weighted average interest rate (in hundredths)	19.00%	19.00%
Unused commitment	$ 0

Accrued Expenses and Other Cu66

Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued wages, bonuses, and benefits	$ 15,640	$ 12,420
Accrued professional fees	5,225	1,183
Current portion of asset retirement obligations	4,092	125
Current portion of capital lease obligations	2,627	2,585
Accrued insurance	2,012	1,386
Accrued income taxes	1,502	3,153
Current portion of retained acquisition contingencies	750	812
Accrued property taxes	825	775
Deferred revenue	641	762
Deferred taxes	188	408
Acquired contract obligations	0	3,696
Other	10,185	11,453
Total	$ 43,687	$ 38,758

Other Long-Term Liabilities (De

Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Other Long-Term Liabilities [Abstract]
Pension and postretirement benefits liability	$ 21,055	$ 20,890
Asset retirement obligations	10,672	9,009
Liability classified stock awards	5,529	5,019
Retained acquisition contingencies	5,328	4,953
Capital lease obligations	4,566	7,231
Environmental remediation obligation	1,179	1,111
Other	4,276	2,413
Total	$ 52,605	$ 50,626

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Revolving credit facility face value	$ 300,000
Derivative instruments outstanding	0
Foreign Exchange Forward and Option contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments outstanding	0	$ 0
Foreign Exchange Forward and Option contracts [Member] | Foreign Exchange (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain recognized	0	(603)	$ (701)
Power Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments outstanding	0	0
Power Hedge [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain recognized	$ 0	$ 0	$ 424

Benefit Plans (Details)

Benefit Plans (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2013USD ($)	Jun. 30, 2015USD ($)Plan	Jun. 30, 2014USD ($)
Benefit Plans [Abstract]
Number of noncontributory defined benefit pension plans | Plan				3
Defined Benefit Plan Disclosure [Line Items]
Pension and other benefit plan contributions	$ 1,303	$ 2,971
Amounts recognized in the consolidated balance sheet consist of [Abstract]
Accumulated other comprehensive loss				$ 5,399	$ 3,689
Accumulated benefit obligation for defined benefit pension plans				$ 59,348	59,888
Reclassification adjustments out of accumulated other comprehensive (loss) income	702
Expected actuarial net losses	1,248
Employer contributions [Abstract]
Estimated future employer contributions for the next fiscal year	$ 1,237
Expected future benefit payments [Abstract]
Projected health care cost trend rate (in hundredths)	6.00%
Ultimate health care cost trend rate (in hundredths)	4.30%
Year that rate reaches ultimate trend rate				2,033
Effect of 1% increase in health care cost trend rate on nonpension postretirement net periodic benefit costs	$ 179
Effect of 1% increase in health care cost trend rate on nonpension postretirement benefit obligations	1,509
Effect of 1% decrease in health care cost trend rate on nonpension postretirement net periodic benefit costs	(133)
Effect of 1% decrease in health care cost trend rate on nonpension postretirement benefit obligation	(1,178)
Pension Plans [Member]
Change in benefit obligations [Abstract]
Benefit obligations at beginning of year	62,525	59,542
Interest cost	2,422	2,623	$ 2,571
Service cost	413	414	893
Plan curtailments	0	0	0
Plan amendments	307	0
Employee contributions	43	52
Actuarial loss (gain)	1,939	3,063
Benefits paid	(2,802)	(2,789)
Net transfer in	229	0
Effect of exchange rate changes	(3,823)	(380)
Benefit obligations at end of year	61,253	62,525	59,542
Change in plan assets [Abstract]
Fair value of plan assets at beginning of year	50,500	43,407
Actual return on plan assets	1,952	7,419
Employer contributions	1,187	2,862
Employee contributions	43	52
Benefits paid	(2,802)	(2,789)
Expenses paid	(240)	(209)
Net transfer in	80	0
Effect of exchange rate changes	(2,763)	(242)
Fair value of plan assets at end of year	47,957	50,500	43,407
Funded status at end of year [Abstract]
Fair value of plan assets	50,500	43,407	43,407	$ 47,957	50,500
Benefit obligations	62,525	62,525	59,542	61,253	62,525
Funded status				(13,296)	(12,025)
Amounts recognized in the consolidated balance sheet consist of [Abstract]
Noncurrent liability				(13,296)	(12,025)
Current liability				0	0
Accumulated other comprehensive loss				12,253	$ 9,310
Net periodic pension expense [Abstract]
Interest cost	2,422	2,623	2,571
Service cost	413	414	893
Expected return on plan assets	(3,146)	(2,791)	(2,516)
Amortization of net loss	702	1,054	1,608
Curtailment gain	0	0	0
Net periodic pension expense	$ 391	$ 1,300	$ 2,556
Expected future benefit payments [Abstract]
2,016				2,889
2,017				3,097
2,018				3,194
2,019				3,284
2,020				3,345
Years 2021-2025				$ 17,058
Pension Plans [Member] | Maximum [Member]
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)				4.15%	4.30%
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)	4.30%	4.75%	5.00%
Expected return on plan assets (in hundredths)	7.00%	7.00%	7.00%
Pension Plans [Member] | Minimum [Member]
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)				4.00%	4.00%
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)	4.00%	3.75%	3.50%
Expected return on plan assets (in hundredths)	5.70%	5.70%	5.70%
Nonpension Postretirement Plan [Member]
Change in benefit obligations [Abstract]
Benefit obligations at beginning of year	$ 9,065	$ 13,316
Interest cost	360	518	$ 617
Service cost	339	640	1,172
Plan curtailments	0	(5,831)	0
Plan amendments	0	0
Employee contributions	0	0
Actuarial loss (gain)	(417)	758
Benefits paid	(116)	(109)
Net transfer in	0	0
Effect of exchange rate changes	(1,317)	(227)
Benefit obligations at end of year	7,914	9,065	13,316
Change in plan assets [Abstract]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	116	109
Employee contributions	0	0
Benefits paid	(116)	(109)
Expenses paid	0	0
Net transfer in	0	0
Effect of exchange rate changes	0	0
Fair value of plan assets at end of year	0	0	0
Funded status at end of year [Abstract]
Fair value of plan assets	0	0	0	$ 0	$ 0
Benefit obligations	9,065	13,316	13,316	7,914	9,065
Funded status				(7,914)	(9,065)
Amounts recognized in the consolidated balance sheet consist of [Abstract]
Noncurrent liability				(7,715)	(8,865)
Current liability				(199)	(200)
Accumulated other comprehensive loss				$ 277	$ 779
Net periodic pension expense [Abstract]
Interest cost	360	518	617
Service cost	339	640	1,172
Expected return on plan assets	0	0	0
Amortization of net loss	0	0	0
Curtailment gain	0	(5,831)	0
Net periodic pension expense	$ 699	$ (4,673)	$ 1,789
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)				4.20%	4.40%
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)	4.40%	4.85%	5.10%
Expected future benefit payments [Abstract]
2,016				$ 199
2,017				227
2,018				241
2,019				249
2,020				253
Years 2021-2025				$ 1,410
Equity Securities [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	40.00%
Benefit plan asset allocation, maximum (in hundredths)	50.00%
Fixed Income Securities [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	40.00%
Benefit plan asset allocation, maximum (in hundredths)	50.00%
Real Estate [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	5.00%
Benefit plan asset allocation, maximum (in hundredths)	10.00%

Benefit Plans, Fair Value and O

Benefit Plans, Fair Value and Other Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Maximum amount employer matches of employees eligible contribution (in hundredths)	25.00%
Maximum contribution per employee that is eligible for company matching (in hundredths)	6.00%
Employers matching contribution [Line Items]
Employers matching contributions	$ 579	$ 393	$ 344
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47,957	50,500
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	818	637
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real Estate Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,200	1,203
Domestic Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,380	5,563
International Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,707	4,890
Comingled Domestic Equity Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,634	4,036
Commingled International Equity Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,849	10,255
Fixed Income Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,556	11,059
Commingled Fixed Income Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,813	12,857
Core Metals [Member]
Employers matching contribution [Line Items]
Employers matching contributions	$ 142	$ 71	$ 95

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income (Loss) before provision for income taxes and income attributable to noncontrolling interest [Abstract]
U.S. operations	$ 54,999	$ 1,822	$ 17,541
Non-U.S. operations	1,279	31,789	(34,616)
Income (loss) before provision for income taxes	56,278	33,611	(17,075)
Current [Abstract]
Federal	13,402	(1,502)	3,120
State	1,355	1,428	696
Foreign	2,777	4,048	2,459
Total current	17,534	3,974	6,275
Deferred [Abstract]
Federal	2,942	(1,807)	2,440
State	642	3,875	(5,568)
Foreign	533	1,663	(413)
Total deferred	4,117	3,731	(3,541)
Total provision for income taxes	$ 21,651	$ 7,705	$ 2,734
Effective of income tax rate reconciliation [Abstract]
Federal statutory rate (in hundredths)	35.00%	35.00%	35.00%
State taxes, net of federal benefit (in hundredths)	0.60%	2.50%	7.50%
Bargain purchase gain (in hundredths)	0.00%	(30.80%)	0.00%
Foreign rate differential (in hundredths)	(0.50%)	0.50%	(9.00%)
Change in valuation allowance (in hundredths)	2.00%	16.00%	3.40%
Goodwill and other asset impairment (in hundredths)	0.00%	0.00%	(57.40%)
Domestic production activities deduction (in hundredths)	(1.80%)	0.00%	1.70%
Step acquisition (in hundredths)	0.00%	0.00%	9.60%
Foreign non-deductible loss ( in hundredths)	0.00%	8.50%	(10.90%)
Uncertain tax position changes (in hundredths)	(0.30%)	(1.00%)	(4.00%)
Noncontrolling interest (in hundredths)	(2.00%)	(4.90%)	5.30%
Other (in hundredths)	5.50%	(2.90%)	2.80%
Effective tax rate (in hundredths)	38.50%	22.90%	(16.00%)
Nontaxable bargain purchase gain	$ 0	$ 29,538	$ 0
Undistributed foreign earnings	84,983
Tax amount of undistributed foreign earnings	2,174
Deferred tax assets [Abstract]
Inventories	1,955	1,173
Accounts receivable	197	530
Accruals	16,202	8,845
Deferred revenue	12	52
Net operating losses and other carryforwards	23,501	24,114
Share-based compensation	7,051	8,414
Other	3,033	3,804
Gross deferred tax assets	51,951	46,932
Valuation allowance	(20,934)	(18,531)
Net deferred tax assets	31,017	28,401
Deferred tax liabilities [Abstract]
Fixed assets	(71,737)	(69,929)
Prepaid expenses	(1,010)	(1,482)
Other	(2,142)	(300)
Total deferred tax liabilities	(74,889)	(71,711)
Net deferred tax liabilities	(43,872)	(43,310)
Valuation Allowance [Line Items]
Valuation allowance amount	20,934	18,531
Valuation allowance, change in amount	2,403
Reconciliation of unrecognized tax benefits, excluding interest and penalties [Roll Forward]
Balance at the beginning of the year	795	1,115	522
Gross increases for prior year tax positions	210	0	659
Gross decreases for prior year tax positions	0	0	0
Lapse in statute of limitations	(307)	(320)	(66)
Balance at the end of the year	698	795	1,115
Interest and penalties included in uncertain tax positions liability	68	138	170
Interest and penalties recognized in income tax benefit/provison	(70)	(31)	98
Change in unrecognized tax benefits is reasonably possible, amount	310
Uncertain tax positions that would impact effective tax rate	698	795	$ 1,115
Federal NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	4,467	4,467
State NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	4,177	861
Foreign NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	8,621	9,201
Federal Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	236	236
State Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	3,433	$ 3,766
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 186,386
Federal [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2025
Federal [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2026
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 303,945
State [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2015
State [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2034
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 20,405
Foreign [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2015
Foreign [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration dates	Jun. 30, 2035
United States [Member]
Income Tax Examination [Line Items]
Open tax years subject to examination	2012 to present
Tax year under routine examination	2,012
Canada [Member]
Income Tax Examination [Line Items]
Open tax years subject to examination	2012 to present
Argentina [Member]
Income Tax Examination [Line Items]
Open tax years subject to examination	2010 to present
China [Member]
Income Tax Examination [Line Items]
Open tax years subject to examination	2011 to present

Commitments and Contingencies72

Commitments and Contingencies (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2015USD ($)Employee	Jun. 30, 2014USD ($)	Jun. 30, 2013USD ($)
Asset Retirement Obligation [Abstract]
Mine reclamation and closure costs	$ 14,764	$ 9,134
Restricted assets for legal settlements	$ 0	0
Employee Contracts [Abstract]
Number of employees | Employee	1,684
Number of salaried employees | Employee	532
Number of hourly employees | Employee	1,152
Number of employees covered by union agreements | Employee	625
Percent of employees covered by collective bargaining agreements (in hundredths)	37.00%
Percent of employees covered by collective bargaining agreements expiring within one year (in hundredths)	6.00%
Period within which union agreements expiring	1 year
Contract Acquisition Cost [Abstract]
Contract acquisition cost	$ 0	16,000	$ 0
Lease expense	4,649	$ 5,059	$ 4,038
Long-term debt obligations, fiscal year maturity [Abstract]
2,016	953
2,017	50
2,018	45
2,019	100,000
2,020	0
2021 and beyond	0
Total	101,048
Power commitments [Abstract]
2,016	17,794
2,017	0
2,018	0
2,019	0
2,020	0
2021 and beyond	0
Contractual obligation, Total	17,794
Purchase commitments [Abstract]
2,016	31,486
2,017	11,160
2,018	0
2,019	0
2,020	0
2021 and beyond	0
Purchase obligation, Total	42,646
Minimum rental commitments, operating leases [Abstract]
2,016	2,247
2,017	1,473
2,018	575
2,019	528
2,020	524
2021 and beyond	3,125
Total	8,472
Minimum rental commitments, capital leases [Abstract]
2,016	2,627
2,017	2,389
2,018	408
2,019	497
2,020	435
2021 and beyond	837
Total	7,193
Indemnification Agreement [Member]
Legal Contingencies [Abstract]
Indemnification obligation	4,559
Indemnification Agreement [Member] | Other Long-Term Liabilities [Member]
Legal Contingencies [Abstract]
Indemnification obligation	$ 1,659

Stockholders' Equity (Details)

Stockholders' Equity (Details) - Entity [Domain] - USD ($) $ / shares in Units, $ in Thousands

1 Months Ended

3 Months Ended

12 Months Ended

Jan. 31, 2013

Jun. 30, 2015

Mar. 31, 2015

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2015

Jun. 30, 2014

May. 05, 2015

Feb. 03, 2015

Nov. 05, 2014

Feb. 10, 2014

Preferred Stock [Abstract]

Preferred Stock, Shares Authorized

1,000,000

1,000,000

Treasury Stock [Abstract]

Treasury stock purchased (in shares)

13,066

1,591,566

Treasury stock acquired under the repurchase program

$ 242

$ 28,962

Dividends [Abstract]

Date dividend declared

May 5, 2015

Feb. 3, 2015

Dividend per common share (in dollars per share)

$ 0.08

$ 0.08

$ 0.075

$ 0.075

$ 0.075

$ 0.075

$ 0.06875

$ 0.06875

$ 0.08

$ 0.075

$ 0.32

$ 0.32

$ 0.300

Total dividends paid

$ 5,900

$ 5,900

$ 5,531

$ 5,532

$ 5,541

$ 5,559

$ 5,178

$ 5,178

Date dividends paid

Jun. 24, 2015

Mar. 12, 2015

Dec. 22, 2014

Sep. 24, 2014

Jun. 24, 2014

Mar. 12, 2014

Dec. 23, 2013

Sep. 24, 2013

Date of stockholders of record

Jun. 10, 2015

Feb. 26, 2015

Dec. 8, 2014

Sep. 10, 2014

Jun. 10, 2014

Feb. 26, 2014

Dec. 9, 2013

Sep. 10, 2013

Maximum [Member]

Treasury Stock [Abstract]

Authorized amount of stock repurchase

$ 75,000

$ 45,800

Yonvey [Member]

Business Acquisition [Line Items]

Company's ownership interest (in hundredths)

28.00%

98.00%

Noncontrolling Interest [Abstract]

Increase ownership by noncontrolling interest

$ 2,330

Earnings (Loss) Per Share (Deta

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Basic earnings (loss) per share computation - numerator [Abstract]
Net income (loss) attributable to Globe Specialty Metals, Inc.	$ 1,922	$ 7,723	$ 9,973	$ 11,702	$ 6,226	$ 1,561	$ 20,768	$ (6,852)	$ 9,744	$ (40,135)	$ 15,068	$ (5,705)	$ 31,320	$ 21,703	$ (21,028)
Basic earnings (loss) per share computation - denominator [Abstract]
Weighted average basic shares outstanding (in shares)													73,751,000	74,674,000	75,207,000
Basic earnings (loss) per common share (in dollars per share)	$ 0.03	$ 0.10	$ 0.14	$ 0.16	$ 0.08	$ 0.02	$ 0.28	$ (0.09)	$ 0.13	$ (0.53)	$ 0.20	$ (0.08)	$ 0.42	$ 0.29	$ (0.28)
Diluted earnings (loss) per share computation - numerator [Abstract]
Net income (loss) attributable to Globe Specialty Metals, Inc.	$ 1,922	$ 7,723	$ 9,973	$ 11,702	$ 6,226	$ 1,561	$ 20,768	$ (6,852)	$ 9,744	$ (40,135)	$ 15,068	$ (5,705)	$ 31,320	$ 21,703	$ (21,028)
Diluted earnings (loss) per share computation - denominator [Abstract]
Weighted average basic shares outstanding (in shares)													73,751,000	74,674,000	75,207,000
Effect of dilutive securities (in shares)													141,066	118,551	0
Weighted average diluted shares outstanding (in shares)													73,892,000	74,793,000	75,207,000
Diluted earnings (loss) per common share (in dollars per share)	$ 0.03	$ 0.10	$ 0.13	$ 0.16	$ 0.08	$ 0.02	$ 0.28	$ (0.09)	$ 0.13	$ (0.53)	$ 0.20	$ (0.08)	$ 0.42	$ 0.29	$ (0.28)
Stock Options and Restricted Stock Grants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares (in shares)													103,630	172,500	367,554

Share-Based Compensation (Detai

Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Stock Plan Activity Since Inception [Abstract]
Increase in shares of common stock authorized for issuance under the Plan (in shares)	1,000,000
Shares of common stock authorized to be issued (in shares)	6,000,000
Shares available for grant (in shares)	2,450,521
Number of Options [Roll Forward]
Outstanding as of beginning of period (in shares)	1,714,996	3,795,252	4,365,397
Granted (in shares)	31,130	439,211	13,188
Forfeited and converted to SARs (in shares)		(2,447,500)
Exercised (in shares)	(56,990)	(45,521)	(583,333)
Forfeited and expired (in shares)	(100,000)	(26,446)	0
Outstanding as of end of period (in shares)	1,589,136	1,714,996	3,795,252
Exercisable as of end of period (in shares)	1,307,745
Weighted Average Exercise Price [Abstract]
Outstanding as of beginning of period (in dollars per share)	$ 17.05	$ 8.74	$ 8.10
Granted (in dollars per share)	17.46	15.82	13.43
Forfeited and converted to SARs (in dollars per share)		4.06
Exercised (in dollars per share)	11.92	9.10	4.03
Forfeited and expired (in dollars per share)	19.87	19.94	0
Outstanding as of end of period (in dollars per share)	17.06	$ 17.05	$ 8.74
Exercisable as of end of period (in dollars per share)	$ 17.36
Weighted Average Remaining Contractual Term in Years [Abstract]
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	1 year 11 months 19 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	1 year 9 months
Aggregate Intrinsic Value [Abstract]
Outstanding as of end of period	$ 3,012
Exercisable as of end of period	$ 2,241
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Vested in period (in shares)	387,247
Total vested options (in shares)	1,307,745
Unvested options outstanding (in shares)	281,391
Restricted Stock Units [Abstract]
Liability associated with restricted stock units	$ 4,851	$ 12,552
Unearned Compensation Expense [Abstract]
Unearned compensation expense	$ 206
Period in which unearned compensation expense will be recognized	1 month 10 days
Selling, General and Administrative Expenses [Member]
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Share-based compensation expense	$ 2,648	13,552	$ 15,333
Share-based compensation expense, net of tax	$ 1,589	$ 8,131	$ 9,200
Minimum [Member]
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Risk free interest rate (in hundredths)	1.56%	0.64%	0.15%
Expected dividend yield (in hundredths)	1.46%	1.41%
Expected volatility (in hundredths)	40.42%	41.07%	29.89%
Expected term		3 years	9 months 29 days
Maximum [Member]
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Risk free interest rate (in hundredths)	1.74%	1.64%	1.38%
Expected dividend yield (in hundredths)	1.92%	2.21%	2.30%
Expected volatility (in hundredths)	44.25%	47.79%	59.90%
Expected term	5 years	5 years	5 years 3 months 22 days
Stock Options [Member]
Stock Plan Activity Since Inception [Abstract]
Contractual terms of option grants, minimum	5 years
Contractual terms of option grants, maximum	10 years
Grant date fair value of options granted (in dollars per share)	$ 5.63	$ 5.27	$ 4.55
Intrinsic value of options exercised	$ 457	$ 507	$ 6,061
Restricted Stock Units [Abstract]
Vesting period of award	3 years
Unearned Compensation Expense [Abstract]
Unearned compensation expense	$ 578
Period in which unearned compensation expense will be recognized	1 year 4 months 10 days
Restricted Stock Grants [Member]
Unearned Compensation Expense [Abstract]
Unearned compensation expense	$ 1,080
Period in which unearned compensation expense will be recognized	5 years 4 months 17 days
Incentive Stock Option [Member]
Stock Plan Activity Since Inception [Abstract]
Vested, fair value	$ 2,982	$ 2,186	$ 2,275
Incentive Stock Option [Member] | June 30, 2016 [Member]
Stock Plan Activity Since Inception [Abstract]
Options, nonvested (in shares)	168,305
Incentive Stock Option [Member] | June 30, 2018 [Member]
Stock Plan Activity Since Inception [Abstract]
Options, nonvested (in shares)		113,086
Restricted Stock Units (RSUs) [Member]
Restricted Stock Units [Abstract]
Vesting period of award	3 years
Awards granted (in shares)	137,597
Awards exercised (in shares)	452,142
Awards outstanding (in shares)	348,866
Liability associated with restricted stock units	$ 3,047
Restricted Stock Units (RSUs) [Member] | Selling, General and Administrative Expenses [Member]
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Share-based compensation expense	1,025	$ 7,298
Share-based compensation expense, net of tax	615	4,378
Restricted Stock Units (RSUs) [Member] | Share-based Liabilities [Member]
Restricted Stock Units [Abstract]
Liability associated with restricted stock units	2,162
Restricted Stock Units (RSUs) [Member] | Other Long Term Liabilities [Member]
Restricted Stock Units [Abstract]
Liability associated with restricted stock units	$ 885
Stock Appreciation Rights (SARs) [Member]
Restricted Stock Units [Abstract]
Vesting period of award	3 years
Awards granted (in shares)	655,330
Awards exercised (in shares)	4,262
Awards outstanding (in shares)	1,976,957
Awards forfeited (in shares)	46,700
Liability associated with share based compensation	$ 4,656
Stock Appreciation Rights (SARs) [Member] | Selling, General and Administrative Expenses [Member]
Assumptions used to estimate fair value of stock option awards granted [Abstract]
Share-based compensation expense	1,602	$ 14,767
Stock Appreciation Rights (SARs) [Member] | Share-based Liabilities [Member]
Restricted Stock Units [Abstract]
Liability associated with share based compensation	209
Stock Appreciation Rights (SARs) [Member] | Other Long Term Liabilities [Member]
Restricted Stock Units [Abstract]
Liability associated with share based compensation	$ 4,447

Fair Value Measures (Details)

Fair Value Measures (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Level 1 [Member] | Corporate Bond Securities [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Marketable securities	$ 4,723	$ 3,976
Gain on sale of marketable securities	41	186
Recurring [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Marketable securities	4,965	10,399
Total assets at fair value	4,965	10,399
Recurring [Member] | Level 1 [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Marketable securities	4,965	10,399
Total assets at fair value	$ 4,965	$ 10,399

Related Party Transactions (Det

Related Party Transactions (Details) - Marco International [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Related Party Transaction [Line Items]
Purchases of carbon electrodes from related party	$ 19,573	$ 19,217	$ 34,785
Amount due to related party for purchase of carbon electrodes	951	1,140
Rare metal purchases from related party	826	559	0
Rare metal payables due to related party	148	0
Sales of ferrosilicon products to related party	778	641	411
Ferrosilicon receivables due from related party	71	0
Calcium silicon powder sales under agreement	176	4,173	$ 1,344
Calcium silicon powder receivables due from related party	$ 176	$ 0

Operating Segments, External cu

Operating Segments, External customers by products and services (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2015USD ($)Segment	Jun. 30, 2014USD ($)	Jun. 30, 2013USD ($)
Operating Segments [Abstract]
Number of reportable segments | Segment	5
Revenue from External Customer by Product Line [Abstract]
Net sales	$ 800,773	$ 752,817	$ 757,550
Silicon Metal [Member]
Revenue from External Customer by Product Line [Abstract]
Net sales	450,788	377,954	422,564
Silicon-based Alloys [Member]
Revenue from External Customer by Product Line [Abstract]
Net sales	261,258	282,998	248,276
Other [Member]
Revenue from External Customer by Product Line [Abstract]
Net sales	$ 88,727	$ 91,865	$ 86,710

Operating Segments, by segment

Operating Segments, by segment (Details) - USD ($) $ in Thousands		3 Months Ended												12 Months Ended
		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Net Sales														$ 800,773	$ 752,817	$ 757,550
Depreciation and Amortization														51,029	43,822	45,108
Operating Income (Loss)		$ 6,894	$ 15,849	$ 17,247	$ 21,901	$ 18,870	$ 7,739	$ (7,375)	$ (4,424)	$ 16,795	$ (42,646)	$ 22,556	$ (5,652)	61,891	14,810	(8,947)
Interest Income														267	67	820
Interest Expense	[1]													(4,343)	(8,022)	(6,887)
Income (Loss) Before Income Taxes														56,278	33,611	(17,075)
Total Assets		829,361				845,126				871,623				829,361	845,126	871,623
Capital Expenditures														(50,019)	(47,075)	(44,509)
Reportable Segments [Member] | GMI [Member]
Segment Reporting Information [Line Items]
Net Sales														753,905	697,403	702,275
Depreciation and Amortization														43,222	39,069	40,274
Operating Income (Loss)														114,733	67,047	73,615
Interest Income														2	26	1
Interest Expense	[1]													(2,085)	(2,760)	(4,107)
Income (Loss) Before Income Taxes														112,768	64,237	68,274
Total Assets		610,592				657,714				686,609				610,592	657,714	686,609
Capital Expenditures														(36,813)	(42,139)	(35,543)
Reportable Segments [Member] | Globe Metales [Member]
Segment Reporting Information [Line Items]
Net Sales														44,945	51,213	51,266
Depreciation and Amortization														2,463	2,414	2,009
Operating Income (Loss)														1,351	5,746	(2,388)
Interest Income														74	18	781
Interest Expense	[1]													(733)	(676)	(1,168)
Income (Loss) Before Income Taxes														(18)	2,671	(3,751)
Total Assets		67,167				72,529				74,517				67,167	72,529	74,517
Capital Expenditures														(1,535)	(3,680)	(1,168)
Reportable Segments [Member] | Solsil [Member]
Segment Reporting Information [Line Items]
Net Sales														0	0	0
Depreciation and Amortization														0	0	362
Operating Income (Loss)														(81)	(42)	(21,147)
Interest Income														0	0	0
Interest Expense	[1]													0	0	0
Income (Loss) Before Income Taxes														(45)	(33)	(21,147)
Total Assets		15,566				15,633				15,347				15,566	15,633	15,347
Capital Expenditures														0	0	(30)
Reportable Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Net Sales														0	0	0
Depreciation and Amortization														288	249	388
Operating Income (Loss)														(45,533)	(53,680)	(47,634)
Interest Income														12	16	37
Interest Expense	[1]													(1,522)	(4,586)	(1,611)
Income (Loss) Before Income Taxes														(46,005)	(28,523)	(48,984)
Total Assets		320,421				385,442				419,504				320,421	385,442	419,504
Capital Expenditures														(334)	(653)	(7,603)
Reportable Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net Sales														36,308	12,651	11,641
Depreciation and Amortization														5,056	2,090	2,075
Operating Income (Loss)														(8,565)	(3,981)	(10,762)
Interest Income														179	7	1
Interest Expense	[1]													(3)	0	(1)
Income (Loss) Before Income Taxes														(10,405)	(4,461)	(10,837)
Total Assets		98,469				76,758				28,615				98,469	76,758	28,615
Capital Expenditures														(11,337)	(603)	(165)
Eliminations [Member]
Segment Reporting Information [Line Items]
Net Sales														(34,385)	(8,450)	(7,632)
Depreciation and Amortization														0	0	0
Operating Income (Loss)														(14)	(280)	(631)
Interest Income														0	0	0
Interest Expense	[1]													0	0	0
Income (Loss) Before Income Taxes														(17)	(280)	(630)
Total Assets		$ (282,854)				$ (362,950)				$ (352,969)				(282,854)	(362,950)	(352,969)
Capital Expenditures														$ 0	$ 0	$ 0
[1]	Net of capitalized interest.

Operating Segments, by external

Operating Segments, by external customers and long lived assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 800,773	$ 752,817	$ 757,550
Long-lived assets	498,589	512,989	466,101
Reportable Geographical Components [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	635,941	628,673	590,011
Long-lived assets	341,023	334,559	328,326
Reportable Geographical Components [Member] | Argentina [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	32,240	43,804	44,240
Long-lived assets	24,684	25,611	24,344
Reportable Geographical Components [Member] | Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	112,532	68,091	112,073
Long-lived assets	73,290	90,071	95,591
Reportable Geographical Components [Member] | China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	188	283	255
Long-lived assets	13,293	15,029	16,955
Reportable Geographical Components [Member] | Poland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	12,147	11,966	10,971
Long-lived assets	741	813	885
Reportable Geographical Components [Member] | South Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	7,725	0	0
Long-lived assets	$ 45,558	$ 46,906	$ 0

Operating Segments, by major cu

Operating Segments, by major customers and by segments (Details)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Revenue, Major Customer [Line Items]
Percentage of consolidated net sales (in hundredths)	100.00%	100.00%	100.00%
Noncontrolling interest's ownership interest in consolidated affiliate (in hundredths)	49.00%	49.00%	49.00%
Dow Corning [Member]
Revenue, Major Customer [Line Items]
Percentage of consolidated net sales (in hundredths)	21.00%	18.00%	19.00%
All Other Customers [Member]
Revenue, Major Customer [Line Items]
Percentage of consolidated net sales (in hundredths)	79.00%	82.00%	81.00%

Business Interruption Insuran82

Business Interruption Insurance Recovery (Details) $ in Thousands	1 Months Ended
	Mar. 31, 2013USD ($)
Bridgeport, Alabama [Member]
Business Interruption Loss [Line Items]
Proceeds from business interruption recovery	$ 4,046
Quebec Silicon plant [Member]
Business Interruption Loss [Line Items]
Proceeds from business interruption recovery	$ 548

Contract Acquisition Costs (Det

Contract Acquisition Costs (Details)	12 Months Ended
	Jun. 30, 2014USD ($)
Contract Acquisition Costs [Abstract]
Payment made under supply arrangement	$ 16,000,000

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares

Aug. 21, 2015

Jun. 30, 2015

Mar. 31, 2015

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2015

Jun. 30, 2014

Jun. 30, 2013

May. 05, 2015

Feb. 03, 2015

Feb. 10, 2014

Subsequent Event [Line Items]

Dividends declared (in dollars per share)

$ 0.31

$ 0.29

$ 0.38

Dividends per share to be paid quarterly (in dollars per share)

$ 0.08

$ 0.08

$ 0.075

$ 0.075

$ 0.075

$ 0.075

$ 0.06875

$ 0.06875

$ 0.08

$ 0.075

$ 0.32

$ 0.32

$ 0.300

Date dividends to be paid

Jun. 24, 2015

Mar. 12, 2015

Dec. 22, 2014

Sep. 24, 2014

Jun. 24, 2014

Mar. 12, 2014

Dec. 23, 2013

Sep. 24, 2013

Subsequent Event [Member] | Dividends Declared [Member]

Subsequent Event [Line Items]

Dividends declared (in dollars per share)

$ 0.32

Dividends per share to be paid quarterly (in dollars per share)

$ 0.08

Date of stockholders of record

Sep. 13, 2015

Date dividends to be paid

Sep. 24, 2015

Unaudited Quarterly Results (De

Unaudited Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Unaudited Quarterly Results [Abstract]
Net sales	$ 202,021	$ 194,653	$ 198,016	$ 206,083	$ 205,360	$ 196,057	$ 178,406	$ 172,994	$ 181,057	$ 195,845	$ 179,940	$ 200,708
Operating (loss) income	6,894	15,849	17,247	21,901	18,870	7,739	(7,375)	(4,424)	16,795	(42,646)	22,556	(5,652)	$ 61,891	$ 14,810	$ (8,947)
Net (loss) income attributable to Globe Specialty Metals, Inc.	$ 1,922	$ 7,723	$ 9,973	$ 11,702	$ 6,226	$ 1,561	$ 20,768	$ (6,852)	$ 9,744	$ (40,135)	$ 15,068	$ (5,705)	$ 31,320	$ 21,703	$ (21,028)
Basic earnings per common share (in dollars per share)	$ 0.03	$ 0.10	$ 0.14	$ 0.16	$ 0.08	$ 0.02	$ 0.28	$ (0.09)	$ 0.13	$ (0.53)	$ 0.20	$ (0.08)	$ 0.42	$ 0.29	$ (0.28)
Diluted earnings per common share (in dollars per share)	$ 0.03	$ 0.10	$ 0.13	$ 0.16	$ 0.08	$ 0.02	$ 0.28	$ (0.09)	$ 0.13	$ (0.53)	$ 0.20	$ (0.08)	$ 0.42	$ 0.29	$ (0.28)