Horsehead Holding (HRRS) 10-K 29 Sep 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Sep. 29, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	ZINCQ
Entity Registrant Name	HORSEHEAD HOLDING CORP
Entity Central Index Key	1,385,544
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		60,352,479
Entity Public Float			$ 584

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 25,675	$ 30,714	$ 136,327	$ 244,119
Accounts receivable, net of allowance of $555 and $371, respectively	42,044	60,242
Inventories	40,491	55,008
Prepaid expenses and other current assets	10,115	3,755
Deferred income taxes		5,251
Total current assets	118,325	154,970
Property, plant and equipment, net	254,841	799,093
Other assets
Intangible assets, net	9,451	10,192
Restricted cash	7,939
Deferred finance costs and other	1,496	9,262
Total other assets	18,886	19,454
Total assets	392,052	973,517
Current liabilities
Current maturities of long-term debt	433,079	3,044
Accounts payable	64,098	67,734
Accrued expenses	24,830	35,645
Total current liabilities	522,007	106,423
Long-term debt, less current maturities		406,016
Other long-term liabilities	15,505	18,291
Deferred income taxes	3,113	8,602
Commitments and contingencies
Stockholders' equity (deficit)
Common stock, par value $0.01 per share; 100,000 shares authorized; 60,174 and 50,719 shares issued and outstanding as of December 31, 2015 and 2014, respectively	602	507
Preferred stock, par value $0.01 per share; 10,000 shares authorized; no shares issued or outstanding
Additional paid-in capital	396,750	313,815
Retained earnings (deficit)	(550,011)	115,377
Accumulated other comprehensive income	247	534
Total stockholders' equity (deficit) before noncontrolling interest	(152,412)	430,233
Noncontrolling interest	3,839	3,952
Total stockholders' equity (deficit)	(148,573)	434,185	$ 444,894	$ 383,281
Total liabilities and stockholders' equity (deficit)	$ 392,052	$ 973,517

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 555	$ 371
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	60,174,000	50,719,000
Common stock, shares outstanding	60,174,000	50,719,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales of zinc material and other goods	$ 331,127	$ 359,487	$ 344,798
Net sales of nickel-based material and other services	47,379	54,020	53,520
EAF dust service fees	36,437	40,430	43,618
Net sales	414,943	453,937	441,936
Cost of sales of zinc material and other goods	385,086	347,391	327,800
Cost of sales of nickel-based material and other services	29,256	32,820	34,399
Cost of EAF dust services	29,318	33,660	34,869
Restructuring expenses		288	7,691
Cost of sales (excluding depreciation and amortization)	443,660	414,159	404,759
(Gain) loss on asset dispositions	(11,029)	915	701
Impairment loss	527,621		9,349
Depreciation and amortization	54,824	35,406	29,678
Selling, general and administrative expenses	26,580	24,149	22,207
Total costs and expenses	1,041,656	474,629	466,694
Loss from operations	(626,713)	(20,692)	(24,758)
Other income (expense)
Interest expense	(39,280)	(21,680)	(2,728)
Interest and other income	946	13,942	6,072
Total other income (expense)	(38,334)	(7,738)	3,344
(Loss) income before income taxes	(665,047)	(28,430)	(21,414)
Income tax provision (benefit)	341	(12,974)	(7,455)
Net loss	$ (665,388)	$ (15,456)	$ (13,959)
Loss per common share:
Basic	$ (11.75)	$ (0.30)	$ (0.31)
Diluted	$ (11.75)	$ (0.30)	$ (0.31)
Weighted average shares outstanding:
Basic	56,632	50,682	45,160
Diluted	56,632	50,682	45,160

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (665,388)	$ (15,456)	$ (13,959)
Other comprehensive income (loss), net of tax:
Net pension liability adjustment	(287)	(133)	911
Comprehensive (loss) income	$ (665,675)	$ (15,589)	$ (13,048)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2012	$ 383,281	$ 439	$ 234,115	$ 144,792	$ (244)	$ 4,179
Beginning Balance, (in shares) at Dec. 31, 2012		43,954,000
Restricted stock vesting		$ 2	(2)
Restricted stock vesting , (in shares)		158,000
Stock compensation expense	3,209		3,209
Distribution to noncontrolling interests	(114)					(114)
Net tax benefit of equity award vesting	(19)		(19)
Restricted stock withheld for taxes	(411)		(411)
Net proceeds from equity offering	71,996	$ 63	71,933
Net proceeds from equity offering , (in shares)		6,325,000
Comprehensive (loss) income, net of tax:	(13,048)			(13,959)	911
Ending Balance at Dec. 31, 2013	444,894	$ 504	308,825	130,833	667	4,065
Ending Balance, (in shares) at Dec. 31, 2013		50,437,000
Restricted stock vesting		$ 2	(2)
Restricted stock vesting , (in shares)		209,000
Stock compensation expense	4,768		4,768
Distribution to noncontrolling interests	(113)					(113)
Net tax benefit of equity award vesting	(33)		(33)
Restricted stock withheld for taxes	(683)		(683)
Stock option exercise	941	$ 1	940
Stock option exercise , (in shares)		73,000
Comprehensive (loss) income, net of tax:	(15,589)			(15,456)	(133)
Ending Balance at Dec. 31, 2014	$ 434,185	$ 507	313,815	115,377	534	3,952
Ending Balance, (in shares) at Dec. 31, 2014	50,719,000	50,719,000
Restricted stock vesting		$ 2	(2)
Restricted stock vesting , (in shares)		195,000
Stock compensation expense	$ 5,420		5,420
Distribution to noncontrolling interests	(113)					(113)
Net tax benefit of equity award vesting	(11)		(11)
Restricted stock withheld for taxes	(441)		(441)
Stock option exercise	33		33
Stock option exercise , (in shares)		3,000
Net proceeds from equity offering	78,029	$ 93	77,936
Net proceeds from equity offering , (in shares)		9,257,000
Comprehensive (loss) income, net of tax:	(665,675)			(665,388)	(287)
Ending Balance at Dec. 31, 2015	$ (148,573)	$ 602	$ 396,750	$ (550,011)	$ 247	$ 3,839
Ending Balance, (in shares) at Dec. 31, 2015	60,174,000	60,174,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net loss	$ (665,388)	$ (15,456)	$ (13,959)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	54,824	35,406	29,678
Gain on insurance recovery related to fixed assets	(254)		(1,791)
Deferred income tax benefit	(238)	(16,356)	(9,862)
Accretion on debt	3,867	3,766	3,727
Accretion on ESOI liabilities	421	431	445
Amortization and write-off of deferred finance costs	4,976	2,759	2,394
Impairment loss	527,621		9,349
(Gain) loss on asset dispositions	(11,029)	915	701
Losses on write down of inventory supplies	3,054	456	2,738
Losses (gains) on derivative financial instruments	901	(1,054)	5,719
Lower of cost or market adjustment to inventories	4,389	3,561	3,739
Stock compensation expense	5,420	4,768	3,209
Capitalization of interest	(2,989)	(14,895)	(29,438)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net	18,198	(1,558)	1,338
Decrease (increase) in inventories, net	3,989	10,551	(14,386)
(Increase) decrease in prepaid expenses and other current assets	(1,585)	1,317	3,399
(Increase) in other assets	(580)	(634)	(97)
(Decrease) increase in accounts payable	(3,636)	(46,457)	30,252
(Decrease) increase in accrued expenses	(7,420)	(7,902)	12,667
(Decrease) increase in other long-term liabilities	(3,207)	(277)	2,173
Net cash (used in) provided by operating activities	(68,666)	(40,659)	41,995
Cash Flows from Investing Activities:
Purchase of property, plant and equipment	(33,693)	(110,825)	(311,798)
Insurance proceeds related to fixed assets	254		1,791
Increase in restricted cash	(7,939)
Proceeds related to the sale of land	9,000
Net cash (used in) provided by investing activities	(32,378)	(110,825)	(310,007)
Cash Flows from Financing Activities:
Proceeds from the issuance of debt		51,300	21,300
Distributions to noncontrolling interest equity holders	(113)	(113)	(114)
Borrowings on the Credit Facilities	79,951	33,324	74,500
Repayments on the Credit Facilities	(57,230)	(35,594)	(18,000)
Debt issuance costs	(1,644)	(1,897)	(524)
Borrowings on the Credit Agreement	496	1,555	13,358
Repayments on the Credit Agreement	(3,065)	(2,929)	(1,866)
Proceeds from the exercise of stock options	33	941
Tax effect of share based compensation award exercise and vesting	(11)	(33)	(19)
Restricted stock withheld for taxes	(441)	(683)	(411)
Net proceeds from the issuance of stock	78,029		71,996
Net cash provided by financing activities	96,005	45,871	160,220
Net decrease in cash and cash equivalents	(5,039)	(105,613)	(107,792)
Cash and cash equivalents at beginning of period	30,714	136,327	244,119
Cash and cash equivalents at end of period	$ 25,675	$ 30,714	$ 136,327

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	NOTE A—ORGANIZATION AND BASIS OF PRESENTATION Horsehead Holding Corp. (“HHC” or the “Company”) was incorporated in the state of Delaware in May 2003. The Company is a producer of zinc and nickel-based products sold primarily to customers throughout the United States of America and Canada. It is a U.S. recycler of electric arc furnace (“EAF”) dust and a U.S recycler of hazardous and non-hazardous waste for the specialty steel industry. It also provides short-line railroad service for the movement of materials for both the Company and outside customers. The Company operates in three business segments. See Footnote Y - Segment Information. The consolidated financial statements include the accounts of HHC and its wholly-owned subsidiaries, Horsehead Corporation (“Horsehead”), Chestnut Ridge Railroad Corp., Horsehead Zinc Recycling, LLC (“HZR”), Horsehead Metals Development, LLC, Horsehead Metal Products, LLC (“HMP”), The International Metals Reclamation Company, LLC (“INMETCO”) and Zochem Inc. (“Zochem”). Intercompany accounts and transactions have been eliminated in consolidation. Certain prior period reclassifications were made to conform with the current period presentation. Losses on asset dispositions of $915 for the year ended December 31, 2014 and $701for the year ended December 31, 2013, were reclassified from Cost of Sales to (Gain) loss on asset dispositions. Impairment losses of $9,349 were reclassified from Cost of Sales to Impairment loss for the year ended December 31, 2013. These reclassifications had no effect on reported net loss, comprehensive loss, cash flows, total assets or shareholders’ equity (deficit) as previously reported. Chapter 11 Bankruptcy Filings On February 2, 2016, the Company and certain of its subsidiaries (the “Debtors”) filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code (the “Bankruptcy Code”) in the U.S. Bankruptcy Court for the District of Delaware (the “Bankruptcy Court”). The Debtors continue to operate their businesses as debtors-in-possession subject to the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code and orders of the Bankruptcy Court. The commencement of the Debtors’ Chapter 11 cases constituted events of default that rendered the financial obligations under the Company’s series of notes automatically and immediately due and payable, subject to the imposition of the automatic stay arising pursuant to Section 362 of the Bankruptcy Code. As a result of the Chapter 11 cases, the Company has reclassified all related debt as current at December 31, 2015. See Footnote N - Long-Term Debt Subsequent Events The Company received notices of default in January 2016, under certain of the Company’s credit facilities, as of November 30, 2015 and December 31, 2015. The notices of default rendered the financial obligations under the credit facilities immediately due and payable and the Company, therefore, has reclassified all debt under the credit facilities as current at December 31, 2015 and has written off the remaining deferred finance costs related to debt under the credit facilities as of December 31, 2015. Liquidity and Going Concern As a result of the Chapter 11 cases and various other factors, including working capital deficits, losses from continuing operations, and defaults and cross-defaults under various credit agreements, there is substantial doubt about the Company’s ability to continue as a going concern. The Company’s financial statements are prepared using accounting principles generally accepted in the United States applicable to a going concern, which contemplates the realization of assets and liquidation of liabilities in the normal course of business. The accompanying historical consolidated financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern. The Company’s ability to continue as a going concern is dependent on many factors, including the Company’s ability to maintain adequate cash on hand and generate cash from operations for the duration of the Chapter 11 cases, the completion of the Chapter 11 plan of reorganization in a timely manner, and the Company’s ability to achieve profitability following emergence from bankruptcy. The consolidated financial statements do not include any adjustments related to the recoverability or classification of recorded asset amounts or the amount and classification of liabilities that might be necessary if the Company is not successful in addressing these factors nor have they been adjusted to reflect any presentation required in accordance with ASC 852-10, “Reorganizations” as the Company filed for Chapter 11 subsequent to year-end and this is treated as a nonrecognized subsequent event in accordance with ASC 855, “Subsequent Events”.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE B - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES A summary of the significant accounting policies consistently applied in the preparation of the accompanying consolidated financial statements follows. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on the Company’s historical experience and its expectations of the future and on various other assumptions that are believed to be reasonable under the circumstances. Actual results could differ from those estimates. Revenue Recognition The Company recognizes revenues from the sale of finished goods when persuasive evidence of a sales arrangement exists which includes a fixed or determinable price, when passage of title or risk of loss has occurred (which is generally at the time of shipment) and when collectability is reasonably assured. The Company recognizes service fee revenue when persuasive evidence of a sales arrangement exists which includes a fixed or determinable price, passage of title or risk of loss has occurred (which is generally at the time of receipt of EAF dust that the Company collects from steel mini-mill operators) and when collectability is reasonably assured. The components of net sales for the years ended December 31, 2015, 2014 and 2013 are as follows: 2015 2014 2013 Zinc and nickel material goods $ 336,484 $ 372,661 $ 363,075 Service fee revenue 67,029 73,494 73,423 Other 11,430 7,782 5,438 $ 414,943 $ 453,937 $ 441,936 One customer comprised 10% and 11% of consolidated net sales for the years ended December 31, 2015 and 2014, respectively. No customer exceeded 10% of consolidated net sales for the year ended December 31, 2013. Our ten largest customers comprised 43%, 44% and 34% of our consolidated net sales in 2015, 2014 and 2013, respectively. Products and services are sold primarily to customers in the hot-dipped galvanizing, rubber, stainless steel and mini-mill markets. Shipping and Handling Fees and Costs The Company classifies all amounts billed to a customer in a sales transaction related to shipping and handling as revenue. The Company records shipping and handling costs incurred in cost of sales. Cash and Cash Equivalents The Company considers all highly liquid investments with maturities of approximately 90 days or less when purchased to be cash equivalents. Accounts Receivable The majority of the Company’s accounts receivable are due from customers primarily in the steel, rubber and galvanizing industries. Credit is extended based on an evaluation of a customer’s financial condition. Generally collateral is not required. Accounts receivable are stated at amounts due from customers net of an allowance for doubtful accounts. Accounts receivable outstanding longer than the contractual payment terms are considered past due. The Company determines its allowance by considering a number of factors, including the length of time trade accounts receivable are past due, the Company’s previous loss history, the customer’s current ability to pay its obligation to the Company and the condition of the general economy and industry as a whole. The Company writes off accounts receivable when they become uncollectible. Payments subsequently received on such receivables are credited to the allowance for doubtful accounts. The provision (benefit) for bad debt was $184, $(122) and $(19) for 2015, 2014, and 2013, respectively. No customer comprised 10% or more of consolidated accounts receivable at December 31, 2015. One customer comprised 17% of consolidated accounts receivable at December 31, 2014. Ten customers comprised 46% of consolidated accounts receivable at both December 31, 2015 and 2014, respectively. Inventories Inventories, which consist primarily of zinc and nickel-bearing materials, chemical reagents and supplies and spare parts are valued at the lower-of-cost-or-market (“LCM”) using a weighted average actual cost method. Zochem values its inventory using the first-in first-out method. Raw materials are purchased, as well as produced, from the processing of EAF dust. Supplies and spare parts inventory used in the production process are purchased and depending on the type of supply or spare part are either classified as long-term supplies, capitalized until consumption, or expensed immediately. Work-in-process and finished goods inventories are valued based on the costs of raw materials plus applicable conversion costs, including depreciation and overhead costs relating to associated process facilities. Zinc and nickel are traded as commodities on the London Metals Exchange (“LME”) and, accordingly, product inventories are subject to price fluctuations. When reviewing inventory for LCM adjustments, the Company considers the forward metal prices as quoted on the LME as of the reporting date in determining its estimate of net realizable value and to determine if an adjustment is required. The Company’s product revenues are based on the current or prior months’ LME average prices. The LME average price upon which product revenue is based has been reasonably correlated with the forward LME price that is used to determine lower of cost or market adjustments. Supplies are not subject to LME LCM adjustments. See Footnote H - Inventories Supplies are adjusted based on obsolescence and slow moving reviews. The Company records an estimate for slow moving and obsolete inventory (“inventory reserve”) based upon our product knowledge, physical inventory observation, future demand, market conditions and an aging analysis of the inventory on hand. For “convenience,” the Company reduces inventory cost through a contra asset rather than through a new cost basis. Property, Plant and Equipment Property, plant and equipment are stated at cost or acquisition date fair value. Depreciation is provided using the straight-line method. Ordinary maintenance and repairs are expensed as incurred; replacements and betterments are capitalized if they extend the useful life of the related asset. The estimated useful lives of property, plant and equipment are as follows: Buildings, land and building improvements 3 - 40 years Machinery and equipment 3 - 30 years Environmental Obligations The Company accrues for costs associated with environmental obligations when such costs are probable and can be reasonably estimated. Accruals for estimated costs are adjusted as further information develops or circumstances change and long-term accruals are discounted. Insurance Claim Liabilities The Company accrues for costs associated with self-insured retention under certain insurance policies (primarily workers’ compensation) based on estimates of claims, including projected development, from information provided by the third party administrator and a third party actuarial firm. Accruals for estimated costs are undiscounted and are subject to change based on development of such claims. Changes in the estimates of the reserves are included in net income in the period determined. Amounts estimated to be paid within one year have been classified as current liabilities, with the remainder included in non-current liabilities in the Consolidated Balance Sheets. Asset Retirement Obligations The fair values of asset retirement obligations are recognized in the period they are incurred if a reasonable estimate of fair value can be made. Asset retirement obligations primarily relate to environmental remediation at three Company locations. The liability is estimated based upon cost studies prepared to estimate environmental remediation upon closure and for purposes of obtaining state permits to operate the facilities. The liability is discounted using the Company’s estimated credit-adjusted risk free interest rate at the time the obligations are recognized. Contingencies During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings. The Company assesses contingencies as to whether they are probable and estimable and records its best estimate of the potential loss. Legal costs associated with these contingencies are recorded as incurred. As a result of their bankruptcy filings, substantially all proceedings pending against the Debtors have been stayed by operation of Section 362(a) of the Bankruptcy Code. Income Taxes Deferred income taxes reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their respective financial reporting amounts. The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. Comprehensive Income (Loss) The term “comprehensive income (loss)” represents the change in stockholders’ equity from transactions and other events and circumstances resulting from non-stockholder sources. The Company’s other comprehensive income or loss, consisting of pension liability adjustments (net of tax), is reported separately in the accompanying Consolidated Statements of Comprehensive Loss. Share-Based Compensation The Company has a share-based compensation plan. Employee stock options are expensed by the Company over the requisite service period, based on the estimated fair value of the award on the date of the grant using the Black-Scholes option-pricing model. Restricted stock unit service or performance related grants are expensed by the Company over the vesting period, with the expense measured based on the stock price on the grant-date multiplied by the number of restricted stock units granted. Restricted stock unit market based grants are expensed by the Company over the vesting period, with the expense determined using a valuation model based on commonly accepted economic theory which is used for all valuations of awards with market conditions. This economic theory is also used as a basis for the Black Scholes and Monte Carlo valuations. Fair Value Fair value is measured using inputs from the three levels of the fair value hierarchy. Classification within the hierarchy is determined based on the lowest level of input that is significant to the fair value measurement. The three levels are described as follows: • Level 1 - Unadjusted quoted prices in active markets for identical assets and liabilities. Cash and cash equivalents including the money market demand account, accounts receivable, accounts payable, and certain accrued expenses are considered to be in Level 1 of the fair value hierarchy as they approximate their fair value due to the short-term nature of these instruments. (see Note G - Cash and Cash Equivalents • Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the determination of the fair value of the asset or liability, either directly or indirectly. Financial swaps and financial option instruments are carried at fair value and are considered to be in level 2 of the fair value hierarchy. These derivatives are not designated as cash flow hedges and the Company recognizes changes in fair value within the consolidated statements of operations as they occur (see Note T - Accounting for Derivative Instruments and Hedging Activities Long Term Debt Pension assets, which are primarily invested in the Manulife Monthly High Income GIF Fund, are carried at fair value and are considered to be in Level 2 of the fair value hierarchy (see Note R - Employee Benefit Plans • Level 3 - Unobservable inputs that are significant to the determination of fair value of the asset or liability. The Convertible Notes, issued on July 27, 2011, were initially valued at fair value and subsequently are carried at amortized cost. The fair value is considered to be in Level 3 of the fair value hierarchy (see Note N - Long-Term Debt Long-Term Debt When developing the fair value measurements, the Company uses quoted market prices whenever available or seeks to maximize the use of observable inputs and minimize the use of unobservable inputs when quoted market prices are not available. Derivatives The Company does not enter into derivative financial instruments unless it has an existing asset or obligation or anticipates a future activity that could result in exposing it to market risk. The Company uses various strategies to manage its market risk, including the use of derivative instruments to limit, offset or reduce such risk. Derivative financial instruments are used to manage well-defined commodity price risks from the Company’s primary business activity. The Company records derivative instruments in current assets or current liabilities in the Consolidated Balance Sheets at fair value. These derivatives are not designated as cash flow hedges and the Company recognizes changes in fair value within the Consolidated Statements of Operations as they occur. The fair values of derivative instruments are based upon a comparison of third party counterparties valuations, with whom the Company has entered into substantially identical derivative contracts, to ensure that there is an acceptable level of consistency among them. The valuations utilize forward pricing and an implied volatility of the underlying commodity as well as interest rate forwards and are therefore subject to fluctuation based on the movements of the commodity markets. Cash flows from derivatives are recognized in the Consolidated Statements of Cash Flows in a manner consistent with the underlying transactions. The Company is exposed to credit loss should counter-parties or clearing agents with which it has entered into derivative transactions become unable to satisfy their obligations in accordance with the underlying agreements. To reduce the risk of such losses, at points in time, the Company utilizes LME-registered contracts entered into with the London Clearing House for some of its contracts. In addition, the Company minimizes credit loss by utilizing four different brokers for its derivative contracts (see Note T - Accounting for Derivative Instruments and Hedging Activities Foreign Currency Translation The functional currency of the Company’s Zochem subsidiary, is the U.S. dollar. A portion of Zochem’s sales, however, and certain other costs remain in the Canadian Dollar and are converted to U.S. Dollars at month end. The resulting translation effect is included in the Consolidated Statements of Operations. Earnings (Loss) per Share Basic earnings (loss) per share are calculated using the weighted-average shares of common stock outstanding. Diluted earnings per share includes the additional effect of other securities, if dilutive, in which case the dilutive effect of such securities is calculated using the treasury stock method (See Note V - Earnings per Share Impairment Long lived assets, which include property, plant and equipment as well as definite life intangible assets, are reviewed for impairment when events and circumstances indicate that the carrying amount of an asset may not be recoverable. The Company’s policy is to record an impairment loss when it is determined that the carrying amount of the asset exceeds the sum of the expected undiscounted future cash flows resulting from use of the asset, and its eventual disposition. Impairment losses are measured as the amount by which the carrying amount of the asset exceeds its fair value, normally as determined in either open market transactions or through the use of a discounted cash flow model. Long lived assets to be disposed of are reported at the lower of the carrying amount or fair value less cost to sell. In assessing the recoverability of our long-lived assets, management may be required to make assumptions regarding estimated future cash flows and other factors to determine the fair value of the respective assets. This process is subjective and requires judgment at many points throughout the analysis. If such estimates or their related assumptions change in subsequent periods or if actual cash flows or other market measures are below management’s estimates, the Company may be required to record impairment charges for these assets not previously recorded or additional impairments on assets already recorded. The Company recorded an impairment loss on its Mooresboro facility in December 2015. See Footnote F- Asset Write-Downs and Disposals We have no goodwill or indefinite life intangible assets. Acquisitions The Company recognizes the assets acquired and the liabilities assumed at their fair values as of the acquisition date. Contingent purchase consideration is recorded at fair value at the date of acquisition. Measuring assets and liabilities at fair value requires the Company to determine the price that would be paid by a third party market participant based on the highest and best use of the assets or interest acquired. The excess of the purchase price over the fair value of the net assets acquired is recorded as goodwill. The excess of the fair value of the net assets acquired over the purchase price is recorded as a bargain purchase gain. Acquisition costs are expensed as incurred. Supplemental Disclosure of Cash Flow Information Cash paid for interest in 2015, 2014 and 2013 was $32,420, $28,743 and $24,721, respectively. Cash paid for interest in 2015, 2014 and 2013 includes interest capitalized of $2,989, $13,942 and $23,809, respectively. Due to the significance of interest capitalized during the construction of the Mooresboro facility, consistent with the Company’s policy for presentation of capitalized interest on capital intense projects such as Mooresboro within the consolidated statements of cash flows, cash from operations in the Company’s Consolidated Statement of Cash Flows for the years ended December 31, 2015, 2014 and 2013, have been adjusted to properly reflect payments related to servicing debt. Cash paid for income taxes in 2015, 2014 and 2013 was $2,760, $1,041 and $2,584, respectively. During 2015, the Company recorded a non-cash investing item as it reclassified $3,085 of supplies inventory to property, plant and equipment. Variable Interest Entities Investments in other entities are accounted for using the consolidation, equity or cost basis method depending upon the Company’s level of ownership, ability to exercise significant influence over the operating and financial policies of the investee and whether the Company is determined to be the primary beneficiary of a variable interest in an entity. In December 2013, HMP entered into a joint venture known as ThirtyOx, LLC (“ThirtyOx”) with Imperial Acquisitions LLC for the acquisition and processing of zinc bearing secondary materials. The processing operation is located in North Carolina near the Company’s zinc facility in Mooresboro, North Carolina. When the zinc facility resumes operations and achieves better production levels than prior to idling, we expect that the majority of the feedstock for the zinc facility will be supplied by Horsehead’s EAF dust recycling plants. ThirtyOx is expected to supply a portion of the incremental zinc feed required by the zinc facility by recovering secondary zinc oxides from the residues generated by galvanizers, die casters and other users of zinc metal. The ThirtyOx facility became operational in August 2014. HMP’s anticipated investment in ThirtyOx is expected to be less than $2,000. HMP’s net investment in ThirtyOx is $340 at December 31, 2015. ThirtyOx was determined to be a variable interest entity as its significant activities are directed by a management agreement and not the equity group. HMP has determined that although it does have influence on ThirtyOx, it is not the primary beneficiary of the variable interest. HMP accounts for its investment in ThirtyOx utilizing the equity method of accounting as it does not own over 50% of the joint venture. HMP has recorded its cash contributions to ThirtyOx as an investment which is increased or decreased by its respective share of ThirtyOx pretax income or loss. The Company has determined that HMP’s interest in ThirtyOx is not individually significant to its consolidated balance sheet and income statement and therefore is not required to provide additional disclosures regarding its involvement with this joint venture. Recently Issued Accounting Pronouncements Adopted In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40) - Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern - Organization and Basis of Presentation In April 2014, the FASB issued ASU No. 2014-08 (“ASU 2014-8”), Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360)-Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes Income Taxes Issued In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). The pronouncement was issued to provide more decision-useful information about the expected credit losses on financial instruments and changes the loss impairment methodology. This pronouncement is effective for reporting periods beginning after December 15, 2019 using a modified retrospective adoption method. A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the effective date. The impact of the adoption of ASU 2016-13 is not expected to have a significant impact on the Company’s consolidated financial position or results of operations. In March 2016 the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In July 2015, the FASB issued ASU No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Topic 835) Presentation and Subsequent Measurement of Debt Issuance Cost Associated with Line-of-Credit Arrangements (Topic 835) In February 2015, The FASB issued ASU No. 2015-02, Consolidation (Topic 810) In May 2014, the FASB and the International Accounting Standards Board (“IASB”) jointly issued ASU No. 2014-9, Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) There have been no other recently issued accounting updates that had or may have a material impact on the Company’s Consolidated Financial Statements.

Equity Offerings

Equity Offerings	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Equity Offerings	NOTE C - EQUITY OFFERINGS On September 27, 2013, the Company filed with the Securities and Exchange Commission (“SEC”) a shelf registration statement on Form S-3, which was declared effective on October 3, 2013. On October 30, 2013, the Company completed an underwritten public offering under the shelf registration statement of 6,325 shares of its common stock, including 825 shares sold pursuant to the underwriters’ exercise of an option to purchase additional shares. At the public offering price of $12.00 per share, the gross proceeds from the offering were $75,900. The net proceeds realized by the Company from the offering, after accounting for $3,416 in underwriting discounts and commissions and $488 in expenses relating to the offering, were $71,996. The net proceeds were available for general corporate purposes, including capital expenditures, acquisitions and working capital. On January 28, 2015, the Company completed an underwritten public offering of 5,750 shares of its common stock, including 750 shares sold pursuant to the underwriters’ exercise of an option to purchase additional shares. At the public offering price of $12.75 per share of common stock, the gross proceeds from the offering were $73,313. The net proceeds realized by the Company from the offering, after deducting $3,299 in underwriting discounts and commissions and $392 in expenses relating to the offering, were $69,622. The net proceeds were available for general corporate purposes, which may include capital expenditures, acquisitions, working capital and liquidity for operational contingencies. On October 23, 2015, the Company entered into an at-the-market equity offering (“ATM”) sales agreement pursuant to which the Company could offer and sell, from time to time, shares of its common stock having an aggregate offering price of up to $50,000, through its sales agent. Subject to the terms and conditions of the sales agreement, the sales agent used commercially reasonable efforts to sell shares of the Company’s common stock in such number, at such times and at such prices as the Company determined. Sales of the shares of the Company’s common stock were made by any method deemed to be an “at-the-market offering” as defined in Rule 415 under the Securities Act of 1933, as amended, including, sales made directly on or through the NASDAQ Global Select Market or sales made to or through a market maker other than on an exchange, in negotiated transactions at market prices prevailing at the time of sale or at prices related to such prevailing market prices. The offering was made under the Company’s registration statement on Form S-3. From October 23, 2015 to December 2, 2015, the Company sold 3,507 shares at an average price of $2.60 per share of common stock. The aggregate gross proceeds from the ATM offering were $9,109. The net proceeds realized by the Company from the ATM offering, after deducting $300 in underwriting discounts and commissions and $402 in expenses related to the offering were $8,407. The Company used the net proceeds from the sale of the shares of its common stock for general corporate purposes, which included liquidity for operational contingencies, working capital and capital expenditures. Sale of equity under the ATM program was suspended by the Company on December 2, 2015.

Restructuring Expenses

Restructuring Expenses	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring Expenses	NOTE D - RESTRUCTURING EXPENSES On October 31, 2013, the Company notified various required parties, as required by the Worker Adjustment and Retraining Notification Act of 1988, 29 U.S.C. § 2101 et seq., Costs and the related liabilities due to involuntary termination costs associated with one-time benefit arrangements provided as part of an exit or disposal activity are recognized by the Company when a formal plan for reorganization is approved at the appropriate level of management and communicated to the affected employees. The Company recorded a charge of $7,691 during the fourth quarter of 2013 and an additional charge of $288 during 2014 for severance and other employee-related costs associated with the closing of the Monaca, Pennsylvania facility. The restructuring accrual was as follows: Accrual at October 31, 2013 $ 7,517 Adjustments to previously recorded restructuring charges 174 Cash payments (9) Accrual at December 31, 2013 7,682 Adjustments to previously recorded restructuring charges 288 Cash payments (7,509) Remaining accrual at December 31, 2014 461 Cash payments (461) Remaining accrual at December 31, 2015 $ —

New Markets Tax Credit Program

New Markets Tax Credit Program Financing	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
New Markets Tax Credit Program Financing	NOTE E - NEW MARKETS TAX CREDIT PROGRAM FINANCING On June 8, 2009, the Company completed a financing arrangement under the New Markets Tax Credit (“NMTC”) program to help fund an expansion project in Barnwell, South Carolina. This financing arrangement was an equity investment in our subsidiary HZR and provided $5,925 of NMTC funds to be used for completion of the development of the project site and construction of buildings and other real property. The funds and the accrued interest thereon were held in escrow and were released upon completion of the aforementioned project site development. A portion of the funds are in the form of an equity investment by Banc of America CDE III, LLC and CCM Community Development IV LLC, in the amount of $5,670. The equity holders are consolidated in the Company’s Consolidated Balance Sheets as of December 31, 2015 and 2014 but do not share in the earnings and losses of the Company, however, they are entitled to cash payments of 2% per annum on their investment. The equity holders also have the option (the “purchase option”) of having their investment purchased by the Company at the end of their seven year investment period in the project. The purchase option totals $360 and is treated as a reduction of their equity holdings and is recorded in Accrued expenses on the Consolidated Balance Sheets as of December 31, 2015 and in Other long-term liability on the Consolidated Balance Sheets as of December 31, 2014. The Company incurred $838 in equity issuance costs related to the financing arrangement which were deducted from the equity proceeds, leaving net proceeds of $4,472 as a non-controlling interest in the Company’s Stockholders’ Equity as of December 31, 2009. The first six payments were made each January beginning in 2010 and reduced the balance of the non-controlling interest to $3,839 at December 31, 2015. A portion of the NMTC funds are in the form of a seven-year loan in the amount of $255. The loan is recorded in Current maturities of long-term debt as of December 31, 2015 and Long-term debt, less current maturities as of December 31, 2014 on the Consolidated Balance Sheets of the Company. On January 22, 2016, the minority equity holders issued Notices of Non-Payment to the Company as a result of annual payments not being made in accordance with various agreements. This, along with the Debtor’s bankruptcy filing on February 2, 2016, resulted in events of default under the NMTC arrangement. These defaults resulted in additional interest and fees as of May 31, 2016 of approximately $140. See Note A - Organization and Basis of Presentation Subsequent Events

Asset Write-Downs and Disposals

Asset Write-Downs and Disposals	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Asset Write-Downs and Disposals	NOTE F - ASSET WRITE-DOWNS AND DISPOSALS During the year ended December 31, 2015, the Company’s operations were significantly impacted due to the dramatic decline in zinc, nickel and other commodity prices, continuing issues that delayed the ramp-up of the Mooresboro zinc facility, and lower EAF dust receipts reflecting weaker steel production. Additionally, on January 22, 2016 the Company temporarily idled the Mooresboro facility in the face of severe liquidity constraints and the Company’s determination that the facility was incapable of generating positive cash flow in the future without significant additional capital investment and/or a recovery in commodity prices. In light of the above facts, during the fourth quarter of 2015, the Company determined a triggering event occurred with respect to its long-lived asset groups that required it to assess if the carrying amount of its long-lived asset may not be recoverable in accordance with ASC 360, Property, Plant and Equipment. Fair value of the Mooresboro asset group was determined using a cost approach including the original cost of the asset group to estimate the replacement cost less new depreciation of the asset group prior to the application of functional and economic obsolescence. Next functional and economic obsolescence was applied by utilizing i) published prices of the Company’s publicly traded debt and equity coupled with ii) the latest twelve months revenue multiples of selected comparable guideline companies to isolate the obsolescence penalty applicable to the Mooresboro asset group. The income approach was not considered an appropriate fair value measurement due to the absence of reliable forecast data. As a result of the impairment test, the Company recorded a non-cash, pretax long-lived asset impairment loss of $527,621 for the Mooresboro asset group. The write down resulted in a reduction of $574,060 in the cost and $46,439 in the accumulated depreciation of the Company’s property, plant and equipment. The total amount of this write-down is included in Loss from operations in the Consolidated Statement of Operations for the year ended December 31, 2015. Following the write-down of the asset group, the remaining net book value of the Mooresboro asset group was $87,643 at December 31, 2015. The impairment charge did not impact the Company’s business operation or future cash flows nor did it result in any cash expenditures. The breakdown of the net book value of the Mooresboro facility after impairment is as follows: December 31, 2015 net book value of the Mooresboro facility prior to impairment charge $ 614,117 Impairment charge (527,621) Supplies inventory included in construction in progress 1,147 Net book value of Mooresboro facility after impairment charge $ 87,643 On October 31, 2013, the Company notified various related parties, as required by the Worker Adjustment and Retraining Notification Act of 1988, 29 U.S.C. § 2101 et seq. Except for the 2015 impairment, explained above, the impairment charge calculations were performed using average expected future cash flows under various likelihoods of asset retirements or dispositions. The cash flows were then discounted and compared to the book value of the related assets and the difference resulted in the impairment charge. As discussed in Note B - Summary of Accounting Policies - Impairment, On November 7, 2014, the Company announced that Shell Chemical LP (“Shell”) had exercised an option to purchase the Monaca, Pennsylvania site under an Amended and Restated Option and Purchase Agreement. The only remaining asset at the Monaca facility, land, had a book value of approximately $1,210. The sale was completed in June 2015 and the Company recorded a gain on the sale of land of $12,152, which included recognition of a $4,500 deferred gain. The gain is recorded in Loss from operations in the Consolidated Statement of Operations for the year ended December 31, 2015. The Company incurred a loss of $1,122, $915 and $701 in 2015, 2014 and 2013, respectively, on the disposal of machinery and equipment. The cost and accumulated depreciation of the assets disposed were $3,115 and $1,993, respectively, in 2015, $1,751 and $836, respectively, in 2014 and $3,550 and $2,849, respectively, in 2013.

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	NOTE G - CASH AND CASH EQUIVALENTS Cash and cash equivalents consisted of the following at December 31, 2015 and 2014: 2015 2014 Cash in bank $ 25,675 $ 30,497 Money market demand account — 217 $ 25,675 $ 30,714 The Company’s cash balance was concentrated in two U.S. banks and one Canadian bank at December 31, 2015 and three U.S. banks and one Canadian bank at December 31, 2014. The Company carries deposits in excess of federally insured amounts. At December 31, 2015, the Company had $856 in cash held at foreign institutions. The money market demand account carried an interest rate of 0.15% at December 31, 2014. The cash balances approximate fair value.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventories	NOTE H—INVENTORIES Inventories consisted of the following at December 31, 2015 and 2014: 2015 2014 Raw materials $ 12,230 $ 17,493 Work-in-process 2,776 2,847 Finished goods 19,545 21,885 Supplies and spare parts 10,458 18,345 45,009 60,570 Excess and obsolete inventory reserves (4,518) (5,562) $ 40,491 $ 55,008 The provision (benefit) for slow-moving inventory was $4,070, $(34) and $3,807 for 2015, 2014 and 2013, respectively. During the fourth quarter of 2013, the Company wrote down its supplies inventory by $2,738 at its Monaca, Pennsylvania facility to net realizable value in anticipation of the closing of the facility. During the second quarter of 2014, the Company took a final write down of $456 on its supplies inventory at its Monaca facility after its closure in April. During the fourth quarter of 2015, the Company wrote down its supplies inventory by $3,054 at its recycling and zinc production facilities due to obsolescence. These charges are included in the Cost of sales of zinc material and other goods in the Consolidated Statement of Operations. The Company recorded LCM adjustments of $4,389 to its finished goods inventories during 2015, $3,561 to its finished goods inventories during 2014 and $3,739 to its raw material and finished goods inventories in 2013. The 2015, 2014 and 2013 LCM adjustments were the result of the declining LME zinc price, increased production costs in 2013 and 2014 at Monaca as the plant operated at inefficient levels during the impending shutdown, and the incurrence of higher than normal production costs in 2014 and 2015 at the new zinc facility in Mooresboro, North Carolina as it operated at inefficient levels during startup.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Prepaid Expenses and Other Current Assets	NOTE I - PREPAID EXPENSES AND OTHER CURRENT ASSETS Prepaid expenses and other current assets consisted of the following at December 31, 2015 and 2014: 2015 2014 Deferred finance costs 4,705 — Other 5,410 3,755 $ 10,115 $ 3,755 See Note N – Long Term Debt

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	NOTE J - PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consisted of the following at December 31, 2015 and 2014. 2015 2014 Land and land improvements $ 24,437 $ 50,117 Buildings and building improvements 41,083 96,904 Machinery and equipment 299,009 736,815 Construction in progress 8,847 33,556 373,376 917,392 Less accumulated depreciation (118,535) (118,299) $ 254,841 $ 799,093 The Company capitalized $2,989, $14,895 and $29,438 of interest expense during the years ended December 31, 2015, 2014 and 2013, respectively, related to the construction of the Mooresboro zinc facility which began operations in May 2014. Through December 31, 2015, the Company had capitalized a total of $58,383 of interest expense related to the Mooresboro zinc facility. The Company recorded an impairment charge of $527,621 related to the Mooresboro facility. See Footnote F- Asset Write-downs and Disposals Subsequent Events Depreciation expense for 2015, 2014 and 2013 was $54,082, $34,326 and $28,176, respectively.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE K - INTANGIBLE ASSETS Intangible assets consisted of the following at December 31, 2015 and 2014: 2015 2014 Customer contracts $ 10,915 $ 10,915 Customer relationships 1,518 2,068 Non-compete agreements 789 789 Trademark 812 812 Technology 400 930 14,434 15,514 Less accumulated amortization (4,983) (5,322) $ 9,451 $ 10,192 Intangible assets are amortized on a straight-line basis over their useful lives, which are fifteen to twenty years for the customer contracts and customer relationships, three to twenty years for trademarks, seventeen years for the non-compete agreement and ten years for the technology asset. The Company amortized $742, $1,080 and $1,502 in 2015, 2014 and 2013, respectively, related to intangible assets and will amortize $740 each year for the next five years.

Restricted Cash

Restricted Cash	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Restricted Cash	NOTE L - RESTRICTED CASH At December 31, 2015, the Company had a total of $7,939 recorded as Restricted Cash in the Company’s Consolidated Balance Sheet to cash collateralize letters of credit. The letters of credit outstanding were entered in to collateralize self-insured claims for workers’ compensation and general insurance claims.

Deferred Finance Costs and Othe

Deferred Finance Costs and Other	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Deferred Finance Costs and Other	NOTE M - DEFERRED FINANCE COSTS AND OTHER Deferred finance costs and other at December 31, 2015 and 2014 consisted of the following: 2015 2014 Deferred finance costs $ — $ 8,042 Other 1,496 1,220 $ 1,496 $ 9,262 See Note N – Long Term Debt

Long - Term Debt

Long - Term Debt	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Long - Term Debt	NOTE N - LONG –TERM DEBT Long-term debt consisted of the following at December 31, 2015 and 2014: 2015 2014 Loan Payable, related to New Market Tax Credit program $ 255 $ 255 3.80% Convertible Senior Notes due July 2017, net of debt discount 93,403 89,448 10.50% Senior Secured Notes due June 2017, including the debt premium 205,081 205,169 9.00% Senior Unsecured Notes due July 2017 40,000 40,000 ABL Facility, interest payable at variable rates — 14,830 Zochem Credit Facility, interest payable at variable rates 17,500 19,400 INMETCO Credit Facility, interest payable at variable rates — 20,000 Macquarie Credit Facility, interest payable at variable rates 59,451 — Credit Agreement, interest payable at variable rates 17,389 19,958 433,079 409,060 Less portion currently payable 433,079 3,044 $ — $ 406,016 The loan payable is associated with the NMTC program discussed in Note E - New Markets Tax Credit Program Financing Convertible Senior Notes On July 27, 2011, the Company issued $100,000 of 3.80% Convertible Senior Notes due 2017 (the “Convertible Notes”) in a private placement. The Company received proceeds of $100,000 and recognized $3,481 in issuance costs in connection with the offering. The Company used the proceeds from the offering for the initial stages of construction for the Mooresboro zinc facility and for general corporate purposes, including working capital needs, investment in business initiatives, capital expenditures and acquisitions. Interest on the Convertible Notes is payable semi-annually in arrears on July 1 and January 1 of each year at a rate of 3.80% per annum. The Convertible Notes mature on July 1, 2017. At December 31, 2015, the Convertible Notes were convertible into shares of the Company’s common stock, cash, or a combination of the Company’s common stock and cash, at the Company’s election, at an initial conversion rate of 0.0666667 shares of the Company’s common stock per $1 principal amount of the Convertible Notes (approximately 6,666.67 underlying shares), which was equivalent to an initial conversion price of approximately $15.00 per share of common stock, subject to adjustment in certain circumstances, as defined in the indenture governing the Convertible Notes. The Convertible Notes are senior unsecured obligations of the Company and at December 31, 2015, ranked senior in right of payment to its future indebtedness expressly subordinated in right of payment to the Convertible Notes; equal in right of payment to its existing and future unsecured indebtedness not so subordinated; effectively junior in right of payment to any of its secured indebtedness, to the extent of the value of the assets securing such indebtedness; and structurally junior to all existing and future indebtedness and other liabilities (including trade payables) of its subsidiaries. At December 31, 2015, holders of the Convertible Notes could convert their Convertible Notes at the applicable conversion rate at any time on or after April 1, 2017 until the close of business on the second business day immediately preceding the maturity date. The Convertible Notes could be converted prior to April 1, 2017 only under certain circumstances. If the Company underwent a fundamental change, as defined in the indenture governing the Convertible Notes, holders could require the Company to repurchase for cash all or a portion of their notes at a price equal to 100% of the principal amount of the Convertible Notes to be repurchased plus any accrued and unpaid interest up to, but excluding the fundamental change repurchase date. At December 31, 2015, the Company did not have the right to redeem the Convertible Notes prior to the stated maturity date of July 1, 2017 and no sinking fund was provided for the Convertible Notes. In accordance with the guidance under ASC 815-15 Embedded Derivatives Debt with Conversion and other Options Imputation of Interest Costs of $3,481 associated with the issuance were allocated to the liability and equity components in proportion to the allocation of the fair value of the Convertible Notes. As such, $2,721 were accounted for as debt issuance costs attributable to the liability component of the Convertible Notes and were capitalized as a component of other assets. These costs were to be amortized to interest expense over the term of the Convertible Notes and are included as a component of interest expense. As discussed in more detail below, due to the filing of relief under Chapter 11 of the Bankruptcy Code, all remaining debt issuance costs were reclassified to current and are included in Prepaid expenses and other current assets in the Consolidated Balance Sheet at December 31, 2015. The Company recognized interest expense of $460 related to the amortization of debt issuance costs for each of the years ended December 31, 2015, 2014 and 2013. The remaining issuance costs of $760 were accounted for as equity issuance costs and were recorded in additional-paid in capital in 2011. During the years ended December 31, 2015, 2014 and 2013, the Company recognized $7,755, $7,433 and $7,139, respectively, in interest expense related to the Convertible Notes. Interest expense includes the contractual interest coupon of 3.80% and amortization of the discount on the liability component. This interest expense reflects an effective interest rate of 8.50%. The carrying amount of the Convertible Notes was $93,403 with an unamortized discount of $6,597 at December 31, 2015. The carrying amount of the Convertible Notes was $89,448 with an unamortized discount of $10,552 at December 31, 2014. The carrying amount of the equity component was $3,564 and $6,052 at December 31, 2015 and 2014, respectively. The accumulated accretion related to the equity component was $9,457 and $6,969 at December 31, 2015 and 2014, respectively. The fair value of the Convertible Notes was estimated to be approximately $26,000 and $122,000 at December 31, 2015 and 2014, respectively, per pricing obtained from a pricing data service. The data service triangulates pricing based on market indications and their quotes do not represent actual trades only implied pricing based on the bid-ask in the market. The commencement of the Debtors’ Chapter 11 cases filed on February 2, 2016 constituted an event of default that rendered the financial obligations under the Convertible Notes automatically and immediately due and payable. As a result, the Company reclassified the Convertible Notes to Current maturities of long-term debt in the Consolidated Balance Sheet at December 31, 2015. In February 2016, in connection with the Chapter 11 proceedings, Delaware Trust Company was appointed as trustee under the indenture governing the Convertible Notes. See Note A - Organization and Basis of Presentation Subsequent Events ABL Facility On September 28, 2011, the Company’s subsidiary Horsehead entered into an ABL Facility (the “ABL Facility”), as borrower, with PNC Bank, as agent and lender, to support liquidity needs for the Company’s Mooresboro zinc facility and to allow for the availability of previously restricted cash. Horsehead Holding Corp. also entered into the ABL Facility, as guarantor of Horsehead’s obligations. The ABL Facility provided for a five-year senior secured revolving credit facility in an aggregate principal amount of up to $60,000. The aggregate amount of loans permitted to be made under the revolving credit facility could not exceed a borrowing base consisting of the lesser of: (a) $60,000, minus the aggregate undrawn amount of outstanding letters of credit, or (b) the sum of certain portions of eligible accounts receivable and eligible inventory of Horsehead, minus the aggregate undrawn amount of outstanding letters of credit and certain availability reserves. Up to an aggregate of $30,000 was available to Horsehead for the issuance of letters of credit, which reduced availability under the ABL Facility. The ABL Facility was terminated on July 6, 2015 when an $80,000 secured revolving credit facility became effective among Horsehead, HMP, The International Metals Reclamation Company, LLC (“INMETCO”) and Macquarie Bank Limited (“Macquarie”), as administrative agent and sole arranger (the “Macquarie Credit Facility”). The Macquarie Credit Facility replaced both the $20,000 INMETCO Facility (as defined below) and the $60,000 ABL Facility. The Company incurred total issuance costs of $600 in connection with the ABL Facility. These costs were capitalized in the Company’s Consolidated Balance Sheet as a component of other assets. The issuance costs were being amortized to interest expense over the term of the ABL Facility. The remaining unamortized issuance costs of $201 related to the ABL Facility were written off to interest expense during the third quarter of 2015. Interest expense of $281, $122 and $90 related to the amortization of deferred finance costs was recorded during the years ended December 31, 2015, 2014 and 2013, respectively. Senior Secured Notes On July 26, 2012, the Company completed a private placement of $175,000 in aggregate principal amount of 10.50% Senior Secured Notes due 2017 (the “Secured Notes”), at an issue price of 98.188% of par. The Company received proceeds of $171,829 and recognized approximately $7,732 in issuance costs in connection with the offering. The total net proceeds from the offering were $164,097. The Company used the proceeds from the Secured Notes to pay for the completion of the construction of the Company’s Mooresboro zinc facility and the remainder for general corporate purposes, including working capital needs, investment in other business initiatives and other capital expenditures. The Company recorded an initial debt carrying value of $171,829 (net of the debt discount of $3,171) and is accreting the long-term debt balance to par value over the term of the Secured Notes using the interest method as required by ASC 835-30 Imputation of Interest On June 3, 2013, the Company completed the sale to certain purchasers of an additional $20,000 in aggregate principal amount of its Secured Notes (the “2013 Additional Notes”) at an issue price of 106.50% of the principal amount of the 2013 Additional Notes plus accrued interest from June 1, 2013, in a private placement to investors who were both qualified institutional buyers and accredited investors. The Company received net proceeds of $20,955 after deducting approximately $345 in issuance costs in connection with the offering. The Company recorded an initial debt carrying value of $21,300 (including the debt premium of $1,300) and is amortizing the long-term debt balance to par value over the remaining term of the Secured Notes using the interest method as required by ASC 835-30 Imputation of Interest On July 29, 2014, the Company completed the sale of an additional $10,000 aggregate principal amount of the Company’s 10.50% Secured Notes due 2017 (the “2014 Additional Notes”), at an issue price of 113.00% of par. The 2014 Additional Notes were offered to investors who were both qualified institutional buyers and accredited investors in a private placement. The Company received net proceeds of $10,962 after deducting approximately $338 in issuance costs in connection with the offering. The Company recorded an initial debt carrying value of $11,300 (including the debt premium of $1,300) and is amortizing the long-term debt balance to par value over the remaining term of the Secured Notes using the interest method as required by ASC 835-30 Imputation of Interest Interest on the Secured Notes, 2013 Additional Notes and 2014 Additional Notes (collectively, the “Senior Secured Notes”) is payable at a rate of 10.50% per annum, in cash semi-annually, in arrears, on June 1 and December 1 of each year. The Senior Secured Notes mature on June 1, 2017. The Company recorded interest expense of $21,283, $21,053 and $19,986 for the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015, the Senior Secured Notes were fully and unconditionally guaranteed, on a senior secured basis, by the Company’s existing and future domestic restricted subsidiaries, other than certain excluded subsidiaries (the “Guarantors”). The Senior Secured Notes and the related guarantees were secured by a first-priority lien on all of the Company’s and the Guarantors’ existing and future property and assets, whether real, personal or mixed (other than certain excluded assets), subject to certain permitted liens; provided that the lien on the accounts receivable, inventory, certain deposit accounts, cash and certain other assets and, in each case, the proceeds thereof, of Horsehead and the guarantors under the Macquarie Credit Facility was a second-priority lien. The Senior Secured Notes were the Company’s and the Guarantors’ senior secured obligations. The Senior Secured Notes and the guarantees ranked equal in right of payment with any of the Company’s and the Guarantors’ senior indebtedness, including indebtedness under the Macquarie Credit Facility and the Company’s Convertible Notes. The Senior Secured Notes and the guarantees ranked senior in right of payment to any of the Company’s and the Guarantors’ future indebtedness that is expressly subordinated to the Senior Secured Notes or guarantees. The Senior Secured Notes and the guarantees were effectively senior to any of the Company’s or the Guarantors’ unsecured indebtedness, including the Convertible Notes, to the extent of the value of the collateral securing the Senior Secured Notes, and the Senior Secured Notes were effectively senior to indebtedness of the Company that was not guaranteed by the Guarantors, including the Company’s Convertible Notes, to the extent of the value of the guarantees. With respect to the collateral securing the Senior Secured Notes, the Senior Secured Notes and the guarantees were effectively junior to the Company’s and the Guarantors’ obligations under the Macquarie Credit Facility, to the extent of the value of the collateral securing the Macquarie Credit Facility on a first-lien basis, and effectively senior to the Company’s and the Guarantors’ obligations under the Macquarie Credit Facility, to the extent of the value of the collateral securing the Macquarie Credit Facility on a second-lien basis. At December 31, 2015, the Company could redeem some or all of the Senior Secured Notes prior to June 1, 2016, by paying a make-whole premium, plus accrued and unpaid interest, if any, to the date of redemption or, on or after June 1, 2016, at a redemption price equal to 105.25%, plus accrued and unpaid interest, if any, to the date of redemption. The Indenture contains certain covenants including the following: (i) incur additional indebtedness and guarantee indebtedness; (ii) declare or pay dividends, redeem capital stock or make other distributions to stockholders; (iii) make investments and acquire assets; (iv) sell or transfer certain assets; (v) enter into transactions with affiliates; (vi) create liens or use assets as security in other transactions; (vii) enter into sale and leaseback transactions; (viii) merge or consolidate, or sell, transfer, lease or dispose of substantially all of its assets; and (ix) make certain payments on indebtedness. The Indenture also provides for customary events of default. On October 24, 2012, the Company entered into the First Supplemental Indenture to the Senior Secured Notes to add HMP as an additional subsidiary guarantor under the Indenture. At December 31, 2015, there was an aggregate of $205,000 par value of Senior Secured Notes outstanding. The carrying amount of the Senior Secured Notes was $205,081 with an unamortized premium of $81 at December 31, 2015. The carrying amount of the Senior Secured Notes was $205,169 with an unamortized premium of $169 at December 31, 2014. The fair value of the Senior Secured Notes was estimated to be approximately $138,000 and $224,000 at December 31, 2015 and 2014, respectively, per pricing obtained from a pricing data service. The data service triangulates pricing based on market indications and their quotes do not represent actual trades only implied pricing based on the bid-ask in the market. Costs of $8,415 associated with the issuance of the Senior Secured Notes were capitalized as a component of other assets. These costs were to be amortized to interest expense over the term of the Senior Secured Notes. As discussed in more detail below, due to the filing of relief under Chapter 11 of the Bankruptcy Code, all remaining debt issuance costs were reclassified to current and are included in Prepaid expenses and other current assets in the Consolidated Balance Sheet at December 31, 2015. The Company recognized interest expense of $1,805, $1,736 and $1,652 related to the amortization of debt issuance costs during the years ended December 31, 2015, 2014 and 2013, respectively. The commencement of the Debtors’ Chapter 11 cases filed on February 2, 2016 constituted an event of default that rendered the financial obligations under the Senior Secured Notes automatically and immediately due and payable. As a result, the Company has reclassified the Senior Secured Notes to Current maturities of Long-term debt in the Consolidated Balance Sheet at December 31, 2015. See Note A - Organization and Basis of Presentation Subsequent Events Credit Agreement On August 28, 2012, Horsehead and HHC entered into a Credit Agreement (the “Credit Agreement”) with Banco Bilbao Vizcaya Argentaria, S.A., a Spanish bank. The Credit Agreement provided for the financing of up to €18,583 (approximately $25,805 USD) for purchases under the contracts between Horsehead and Tecnicas Reunidas, S.A., a Spanish corporation providing equipment and related products and services for the Mooresboro zinc facility and additional financing of $968 for the premium for the insurance on such loan which was issued by Compania Espanola de Seguros de Credito a la Exportacion (“CESCE”). The facility became effective on November 14, 2012. The obligations of Horsehead under the Credit Agreement are secured by an unconditional guarantee of the Company, but are not secured by security interest or mortgages on any real or personal property of Horsehead, the Company or any of the Company’s other direct or indirect subsidiaries. At December 31, 2015, the Credit Agreement provided for drawings under the agreement to be repaid semiannually over a period ending on February 2024, amortizing over that period, and bearing interest at a per annum rate equal to the London Interbank Offered Rate (“LIBOR”) plus 3.20%. Principal and interest payments were due quarterly. The Company paid a commitment fee of 0.50% calculated on the undrawn amount of the Credit Agreement semiannually. At December 31, 2015, the Company had outstanding borrowings of $17,389 under the Credit Agreement and no remaining availability. The carrying amount of the debt approximated fair value at December 31, 2015. The Credit Agreement contains customary events of default. At December 31, 2015, in the event of a default, the Credit Agreement would have been terminated and immediate repayment required for all amounts outstanding under the Credit Agreement including accrued interest. At December 31, 2015, the Credit Agreement contained a maximum Debt to Equity ratio of 1.2:1. The Credit Agreement also contains customary restrictive negative covenants as well as customary reporting and other affirmative covenants. The Company incurred issuance costs of $1,248 in connection with the Credit Agreement. These costs were capitalized in the Company’s Consolidated Balance Sheet as a component of other assets. The issuance costs were to be amortized to interest expense over the term of the Credit Agreement. As discussed in more detail below, due to the filing of relief under Chapter 11 of the Bankruptcy Code, all remaining debt issuance costs were reclassified to current and are included in Prepaid expenses and other current assets in the Consolidated Balance Sheet at December 31, 2015. Interest expense of $141 related to the amortization of deferred finance costs were recorded during each of the years ended December 31, 2015, 2014 and 2013. The commencement of the Debtors’ Chapter 11 cases filed on filed on February 2, 2016 constituted an event of default that rendered the financial obligations under the Credit Agreement automatically and immediately due and payable. As a result, the Company has reclassified all remaining obligations under the Credit Agreement to Current maturities of Long-term debt in the Consolidated Balance Sheet at December 31, 2015. See Note A - Organization and Basis of Presentation Subsequent Events Zochem Revolving Credit and Security Agreement On December 21, 2012, Zochem entered into a Revolving Credit and Security Agreement (the “Zochem Facility”), as borrower, with PNC Bank, Canada Branch, as agent and lender. The Company also entered into the Zochem Facility as a guarantor of Zochem’s obligations. Zochem entered into the Zochem Facility to support liquidity during the construction of a production capacity expansion at its facility located in Brampton, Ontario. On April 29, 2014, Zochem terminated the $15,000 CAD Zochem Facility and entered into, as borrower, a new $20,000 revolving credit facility (the “2014 Zochem Facility”) with PNC Bank, as agent and lender. The Company also entered into the 2014 Zochem Facility as a guarantor of Zochem’s obligations. Terms under the 2014 Zochem Facility were essentially the same as the terms under the terminated Zochem Facility. The 2014 Zochem Facility provided for a twenty-nine month senior secured revolving credit facility in an aggregate principal amount of up to $20,000. At December 31, 2015, the aggregate amount of loans permitted under the 2014 Zochem Facility could not exceed a borrowing base consisting of the lesser of: (a) $20,000, minus the aggregate undrawn amount of outstanding letters of credit, and (b) the sum of a certain portion of eligible accounts receivables and eligible inventory of Zochem, minus the aggregate undrawn amount of outstanding letters of credit and certain availability reserves. At December 31, 2015, up to an aggregate of $5,000 was available for the issuance of letters of credit, which reduced availability under the 2014 Zochem Facility. Zochem’s obligations are secured by a first priority lien (subject to certain permitted liens) on substantially all of the tangible and intangible assets of Zochem. At December 31, 2015, the Company had $17,500 in outstanding borrowings under the 2014 Zochem Facility. There was no undrawn availability at December 31, 2015. The carrying amount of the debt approximated fair value at December 31, 2015. Borrowings by Zochem under the 2014 Zochem Facility bore interest at a rate per annum which, at the option of Zochem, can be either: (a) a domestic rate equal to the “alternate base rate,” as determined under the 2014 Zochem Facility, plus an applicable margin of 1.00% based on average undrawn availability, or (b) a CDOR, LIBOR or eurodollar rate as applicable, plus a margin of 2.50% based on average undrawn availability. Zochem paid a letter of credit fee to the lenders under the Zochem Facility of 2.50%, based on average undrawn availability, and a fronting fee to the issuing bank equal to 0.25% per annum on the average daily face amount of each outstanding letter of credit, as well as certain other related charges and expenses. Zochem paid an unused line fee to the lenders of 0.75% per annum, based on average undrawn availability, times the amount by which the maximum revolving advance amount exceeded the average daily unpaid balance of revolver loans and undrawn amount of any outstanding letters of credit during any calendar quarter. The 2014 Zochem Facility contains customary events of default. At December 31, 2015, during an event of default, if the agent or lenders holding greater than 66 2/3% of the advances under the facility so elected, the interest rate applied to any outstanding obligations would be equal to the otherwise applicable rate (including the highest applicable margin) plus 2.0% and any letter of credit fees would be increased by 2.0%. Upon (a) the occurrence of an event of default related to the bankruptcy of Zochem or the Company or (b) at the option of lenders holding greater than 66 2/3% of the advances under the facility, the occurrence of any other event of default, all obligations under the 2014 Zochem Facility became immediately due and payable. At December 31, 2015, the 2014 Zochem Facility also contained a minimum fixed charge coverage ratio of 1.15:1.00 which Zochem had to comply with at the time of any advance request. The 2014 Zochem Facility also contains customary restrictive negative covenants as well as customary reporting and other affirmative covenants. On January 6, 2016 and January 13, 2016, the Company received notices of default, effective November 30, 2015 and December 31, 2015, from PNC Bank related to failure to comply with the required fixed charge coverage ratio under the 2014 Zochem Credit Facility following transfers of funds to Horsehead in 2015. The notice sent on January 13, 2016, demanded immediate payment of all outstanding obligations under the 2014 Zochem Credit Facility. The Company incurred total issuance costs of $201 in connection with the 2014 Zochem Facility. These costs were capitalized in the Company’s Consolidated Balance Sheet as a component of other assets. The issuance costs were to be amortized to interest expense over the remaining term of the 2014 Zochem Facility, however, based upon the notices of default, which stated defaults as of November 30, 2015 and December 31, 2015, the remaining deferred finance costs were written off. Interest expense of $116, $55 and $30 related to the amortization and write-off of deferred finance costs was recognized during the years ended December 31, 2015, 2014 and 2013, respectively. INMETCO Senior Secured Revolving Credit Agreement On June 24, 2013, INMETCO entered into a Senior Secured Revolving Credit Agreement (the “INMETCO Facility”), as borrower, with Wells Fargo Bank, N.A., as lender. The Company entered into a guaranty of INMETCO’s obligations under the INMETCO Facility. INMETCO entered into the INMETCO Facility to support working capital requirements and for general corporate purposes. On March 31, 2014, the Company entered into the First Amendment to the Credit Agreement which amended certain provisions of the Credit Agreement including the increase of the maximum advances allowed from $15,000 to $20,000. The INMETCO Facility was terminated on July 6, 2015 when a new $80,000 secured revolving credit facility became effective among Horsehead, HMP and INMETCO and Macquarie, as administrative agent and sole arranger. The Macquarie Credit Facility replaced both the $20,000 INMETCO Facility and the $60,000 ABL Facility. INMETCO incurred issuance costs of $151 in connection with the INMETCO Facility. These costs were capitalized in the Company’s Consolidated Balance Sheet as a component of other assets. The issuance costs were being amortized to interest expense over the term of the INMETCO Facility. The remaining unamortized issuance costs related to the INMETCO Facility were written off to interest expense during the third quarter of 2015. Interest expense of $79, $51 and $21 related to the amortization of deferred finance costs was recorded during the years ended December 31, 2015, 2014 and 2013, respectively. Senior Unsecured Notes On July 29, 2014, the Company completed the sale of $40,000 aggregate principal amount of 9.00% Senior Notes due 2017 (the “Unsecured Notes”), at an issue price of 100.00% of par. The Unsecured Notes were offered to investors who were both qualified institutional buyers and accredited investors in a private placement. The Company received net proceeds of $38,686 after deducting approximately $1,314 in issuance costs in connection with the offering. The Unsecured Notes were issued pursuant to an indenture, dated as of July 29, 2014 (the “Unsecured Notes Indenture”), among the Company, the Guarantors and U.S. Bank National Association, as trustee. In February 2016, in connection with the Chapter 11 cases, Wilmington Trust, National Association, was appointed as trustee under the indenture governing the Unsecured Notes. Interest under the Unsecured Notes is payable at a rate of 9.00% per annum, in cash semi-annually, in arrears, on June 1 and December 1 of each year, beginning on December 1, 2014 and mature on June 1, 2017. The Company recorded interest expense of $3,600 and $1,520 for the years ended December 31, 2015 and 2014, respectively. The Unsecured Notes are fully and unconditionally guaranteed, on a senior unsecured basis (other than as described below), by the Company’s existing and future domestic restricted subsidiaries, other than certain excluded subsidiaries. The Unsecured Notes are the Company’s and the Guarantors’ senior unsecured obligations (other than as described below). At December 31, 2015, the Unsecured Notes and the guarantees (i) ranked equal in right of payment with the Company’s and the Guarantors’ senior indebtedness (other than as described below) (including indebtedness under the Company’s Senior Secured Notes due 2017, the Convertible Notes due 2017, and the Macquarie Credit Facility; (ii) ranked senior in right of payment with the Company’s and the Guarantors’ future indebtedness that is expressly subordinated to the Unsecured Notes, and (iii) were effectively junior to the Company’s and the Guarantors’ obligations under the Senior Secured Notes and the Macquarie Credit Facility, to the extent of the value of the collateral securing such indebtedness. At December 31, 2015, the Company could redeem some or all of the Unsecured Notes, on or after June 1, 2016 at a redemption price equal to 104.50%, plus accrued and unpaid interest, if any, to the date of redemption. In addition, the Company could, at its option, redeem some or all of the Unsecured Notes prior to June 1, 2016, by paying a make-whole premium, plus accrued and unpaid interest, if any, to the date of redemption. The indenture, governing the Unsecured Notes, contains certain covenants, including the following: (i) incur additional indebtedness and guarantee indebtedness; (ii) declare or pay dividends, redeem capital stock or make other distributions to stockholders; (iii) make investments and acquire assets; (iv) sell or transfer certain assets; (v) enter into transactions with affiliates; (vi) create liens or use assets as security in other transactions; (vii) enter into sale and leaseback transactions; (viii) merge or consolidate, or sell, transfer, lease or dispose of substantially all of its assets; and (ix) make certain payments on indebtedness. The Unsecured Notes Indenture also provides for customary events of default. Costs of $1,314 associated with the issuance of the Unsecured Notes were capitalized as a component of other assets. These costs were being amortized to interest expense over the term of the Unsecured Notes. As discussed in more detail below, due to the filing of relief under Chapter 11 of the Bankruptcy Code, all remaining debt issuance costs were reclassified to current and are included in Prepaid expenses and other current assets in the Consolidated Balance Sheet at December 31, 2015. The Company recognized interest expense of $464 and $193 related to the amortization of debt issuance costs during the year ended December 31, 2015 and 2014, respectively. The fair value of the Unsecured Notes was estimated to be approximately $23,700 and $40,000 at December 31, 2015 and 2014, respectively, per pricing obtained from a pricing data service. The data service triangulates pricing based on market indications and their quotes do not represent actual trades only implied pricing based on the bid-ask in the market. The commencement of the Debtors’ Chapter 11 cases filed on filed on February 2, 2016 constituted an event of default that rendered the financial obligations under the Senior Unsecured Notes automatically and immediately due and payable. As a result, the Company has reclassified the Senior Unsecured Notes to Current maturities of Long-term debt in the Consolidated Balance Sheet at December 31, 2015. See Note A - Organization and Basis of Presentation Subsequent Events Macquarie Revolving Credit Facility On June 30, 2015, the Company’s wholly owned direct and indirect subsidiaries, INMETCO, Horsehead Corporation and HMP, entered into the Macquarie Credit Facility with Macquarie, which became effective on July 6, 2015 and matures on Ma

Accrued Expenses

Accrued Expenses	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued Expenses	NOTE O - ACCRUED EXPENSES Accrued expenses at December 31, 2015 and 2014 consisted of the following: 2015 2014 Employee related costs $ 5,868 $ 5,717 EAF dust processing reserve 3,336 3,684 Workers’ compensation insurance claim liabilities 1,500 1,500 Unearned tolling revenue 1,305 2,434 Accrued sales tax 2,291 950 Accrued interest 4,534 4,473 Accrued hedge contracts 1,275 375 Accrued insurance 1,749 1,767 Unearned contractual services — 3,976 Other 2,972 10,769 $ 24,830 $ 35,645

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE P - INCOME TAXES The components of loss before income taxes for the years ending December 31 are as follows: 2015 2014 2013 United States $ (670,686) $ (41,984) $ (29,355) Canada 5,639 13,554 7,941 $ (665,047) $ (28,430) $ (21,414) The components of income tax provision (benefit) for the years ended December 31, 2015, 2014 and 2013 are as follows: 2015 2014 2013 Current provision (benefit) Federal $ 325 $ — $ — State and local (45) 1,072 1,154 Foreign 227 2,294 1,271 507 3,366 2,425 Deferred (benefit) provision: Federal (5,955) (12,681) (10,888) State and local 4,575 (4,385) 457 Foreign 1,214 726 551 (166) (16,340) (9,880) Income tax provision (benefit) $ 341 $ (12,974) $ (7,455) The reconciliation between income tax provision (benefit) and the amount computed by applying the statutory federal income tax rate of 35% to loss before income taxes is as follows: 2015 2014 2013 Income taxes at statutory rate $ (232,766) $ (9,950) $ (7,495) State and local income taxes, net of federal tax effect (11,693) (2,093) 1,047 State tax credit (185,974) — — Valuation allowance 419,386 — — Executive compensation — 364 230 Research and development credit — (80) (139) Undistributed foreign earnings 10,942 — — Section 956 deemed dividend 569 — — Withholding tax 325 — — Foreign rate differential (565) (1,256) (794) Other 117 41 (304) Income tax provision (benefit) $ 341 $ (12,974) $ (7,455) The effective tax rates for the years ended December 31, 2015, 2014 and 2013 were (0.1)%, 45.6% and 34.8%, respectively. The components of the Company’s net deferred tax asset (liability) at December 31, 2015 and 2014 are as follows: 2015 2014 Deferred tax assets: Accrued fringe benefits 412 $ 104 Prepaid hedge contracts 507 90 Stock compensation 5,668 4,628 State tax credits 188,171 2,197 State net operating loss carry forward 10,152 7,534 Federal net operating loss carry forward 120,215 49,003 Inventory 8,363 1,205 Accrued workers compensation — 901 Partnership allocations 552 70 Property, plant and equipment 96,473 — Other 5,772 7,563 Gross deferred tax asset 436,285 73,295 Valuation reserve (422,091) (2,706) Net deferred tax asset 14,194 70,589 Deferred tax liabilities: Property, plant and equipment — (67,452) Deferred financing costs (2,425) (4,090) Undistributed foreign earnings (12,488) — Intangible assets (645) (704) Other (1,749) (1,694) Total deferred tax liabilities (17,307) (73,940) Net deferred tax liability $ (3,113) $ (3,351) The above deferred tax assets and liabilities at December 31, 2015 and 2014 have been included in the Company’s consolidated balance sheets as follows: 2015 2014 Current deferred tax asset $ — $ 5,251 Current deferred tax liability — — Net current deferred tax asset — 5,251 Non-current deferred tax asset — — Non-current deferred tax liability (3,113) (8,602) Net non-current deferred tax liability (3,113) (8,602) Net deferred tax liability $ (3,113) $ (3,351) The Company and its subsidiaries file income tax returns in the U.S., Canada and various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. The tax years that remain subject to examination generally range from 2010 through 2015. During the fourth quarter of 2015, the Company experienced dramatic liquidity constraints making it necessary that funds be transferred from the foreign subsidiary to the Company. At December 31, 2015 the Company owed the foreign subsidiary $6,500. Subsequently the Company received notices of default from both revolving credit facility lenders notifying that the revolving credit facilities were in default as of December 31, 2015. The Company has no means of repaying funds to the foreign subsidiary and has since filed for bankruptcy. For 2015, U.S. income taxes and foreign withholding taxes are provided on undistributed earnings of foreign subsidiaries because it is expected such earnings will not be permanently reinvested in the operations of such subsidiaries. For 2014, U.S. income taxes and foreign withholding taxes were not provided on undistributed earnings of foreign subsidiaries because it was expected such earnings would be permanently reinvested in the operations of such subsidiaries. It was not practical to determine the amount of income tax liability that would have resulted had such earnings been repatriated. In October 2015, the Company received a tax certification notice from the state of North Carolina that it had qualified for and been approved for an income tax credit on the eligible assets related to its recycling equipment at its facility located in Mooresboro, North Carolina. The Company is eligible to receive a tax credit not to exceed 50% of its verified equipment which exceeded $500,000 in total cost. During the fourth quarter of 2015, the Company recorded the related tax benefit, which was offset by, the required valuation allowance. At December 31, 2015 and 2014, the Company had U.S. net operating loss carryforwards of approximately $349,000 and $144,000, respectively. Of that amount, $5,100 and $4,200 relates to stock-based compensation tax deductions in excess of book compensation expense (the “APIC NOL’s”) at December 31, 2015 and 2014, respectively, that will be credited to additional paid-in-capital when such deductions reduce taxes payable as determined on a “with-and-without” basis. The APIC NOL’s will reduce federal taxes payable if realized in future periods. The APIC NOL’s related to such benefits are not included in the table below. The details of our U.S. federal and state net operating loss carryforwards and U.S. state tax credit carryforwards as of December 31, 2015 are summarized as follows: U.S. Federal U.S. State U.S. State Net Operating Loss Net Operating Loss Credit Generated Expiration Carryforwards Carryforwards Carryforwards 2010 - 2015 2030 - 2035 $ 343,473 $ — $ — 2004 - 2015 2016 - 2035 — 243,418 — 2007 - 2015 2017 - 2039 — — 188,171 $ 343,473 $ 243,418 $ 188,171 Due to the uncertainty surrounding the realization of the related deferred tax assets in future tax returns, as a result of recent history of net operating losses due to ramp up challenges at the Mooresboro facility and softening commodity prices, the Mooresboro facility impairment and the subsequent Chapter 11 bankruptcy filing on February 2, 2016, all of the net deferred U.S. tax assets have been fully offset by a valuation allowance at December 31, 2015. The remaining deferred tax liabilities result from the Company’s Canadian operations. See Note A - Organization and Basis of Presentation Subsequent Events Due to the change of ownership provisions of the Tax Reform Act of 1986, use of a portion of our domestic net operating loss and tax credit carryforwards may be limited in future periods, which would result in all or a portion of the carryforwards expiring. Further, a portion of the carryforwards may expire before being applied to reduce future income tax liabilities. The Company had no unrecognized tax benefits as of December 31, 2015 and 2014, respectively. The Company classifies all income tax related interest and penalties as interest expense, which were not significant for 2015, 2014 and 2013.

Other Long-Term Liabilities

Other Long-Term Liabilities	12 Months Ended
	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Other Long-Term Liabilities	NOTE Q—OTHER LONG-TERM LIABILITIES Other long-term liabilities at December 31, 2015 and 2014 consisted of the following: 2015 2014 Environmental obligations $ 567 $ 620 Insurance claim liabilities 5,603 7,753 Asset retirement obligations 5,123 4,775 Deferred purchase price obligation 3,538 3,769 Other 674 1,374 $ 15,505 $ 18,291 Environmental obligations Environmental obligations include estimated post-closure costs required by the EPA’s Resource Conservation and Recovery Act (“RCRA”) related to a portion of the property at the Company’s Bartlesville, Oklahoma facility. This liability was recorded based on the estimated costs required to achieve compliance with the RCRA. In 2006, a post-closure permit was issued by the Oklahoma Department of Environmental Quality which triggered the beginning of a thirty year period of post-closure care. Based on the Company’s annual review of the estimated costs required for the care specified under the permit, the liability was adjusted in 2015 and 2014 to reflect the discounted net present value of these costs using an undiscounted obligation of $1,123 in 2015 and $1,262 in 2014 and a discount rate of 6%. The environmental obligations related to Bartlesville at December 31, 2015 totaled $609, of which $42 is recorded as a current liability. Insurance claim liabilities Insurance claim liabilities represent the non-current portion of the Company’s liabilities for self-insured retention under certain insurance policies, primarily related to workers’ compensation. The Company estimates $1,500 of workers’ compensation claims will be paid in 2016 pursuant to certain relief granted with respect to such claims by the Bankruptcy Court. See Note O- Accrued Expenses Asset retirement obligations The Company currently recognizes a liability for the present value of future asset retirement obligations if a reasonable estimate of the fair value of that liability can be made. The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset. Three such assets and related liabilities exist. The first is for the environmental remediation upon ultimate closure of the Ellwood City facility. The original long lived asset cost was determined to be $744 and is being amortized and accreted over a 20 year period. The second is for the ultimate closure of the Monaca facility’s fully permitted landfill. The original long lived asset cost was determined to be $632 and is being amortized and accreted over an 18 year period. During the fourth quarter of 2011, the Company received notification from the Pennsylvania Department of Environmental Protection (“PADEP”) that an additional bond would be required to fulfill obligations related to the landfill at the Monaca facility. The Company determined the additional long lived asset to be $815 and this amount is being amortized and accreted over a 10 year period. Due to the sale of the Monaca land to Shell in June 2015, the Company was required to submit a closure plan to PADEP for the landfill during the fourth quarter of 2015. The Company has not received a final response from PADEP with respect to the closure plan. The third relates to the permitted storage units at the Palmerton facility. Its original cost was valued at $206 and is being amortized and accreted over a 25 year period. The related depreciation expense for each of the years ended December 31, 2015, 2014 and 2013 associated with the capitalized costs were $134 and the related expense (which is included in interest expense) associated with accreting the liabilities for the years ended December 31, 2015, 2014 and 2013 was $348, $323 and $300, respectively. Deferred asset purchase price obligations The Company is paying a portion of the purchase price of ESOI’s EAF dust collection business in a series of annual fixed and quarterly variable payments through 2025. The payments were originally discounted using rates of approximately 8.4% and 12.0% for the fixed and variable payments, respectively. The discount rates were determined based on the average yield on comparable corporate bonds and the industry weighted average cost of capital. During the first quarter of 2012, the variable portion of the payments was renegotiated and an upfront payment of approximately $1.5 million was made. The renegotiated variable payments were discounted using a rate of 13.3%. At December 31, 2015, the net present value of the payments was approximately $4,188 of which $650 is recorded as a current liability.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
Postemployment Benefits [Abstract]
Employee Benefit Plans	NOTE R - EMPLOYEE BENEFIT PLANS The Company maintains two defined contribution 401(k) plans that cover substantially all of its employees at the Horsehead and INMETCO locations. All Horsehead and INMETCO salaried employees and INMETCO hourly employees are automatically enrolled at 4% of their pay upon date of hire. Effective October 1, 2009, the Company amended the eligibility requirements in the plan covering the Horsehead hourly employees. Under the amendment, hourly employees are eligible to enroll ninety days after their date of hire. Employees may make elective deferral contributions to the plans subject to certain plan and statutory limitations. The Company makes all contributions to the plans on behalf of each employee who has achieved one year of service. Under the plans covering the salaried employees and the INMETCO hourly employees, the Company contributes 3% of an employee’s total compensation and also matches 50% up to the first 4% of an employee’s deferral contribution based on total compensation. The provisions for all contributions to the plan for 2015, 2014 and 2013 were $935, $1,058 and $1,081, respectively. In 2015, 2014 and 2013, the Company made contributions and matching contributions to the plans covering Horsehead hourly employees in accordance with the provisions of the various basic labor agreements. The provisions for all contributions for 2015, 2014 and 2013 were approximately $369, $911 and $1,546, respectively. In 2014, due to the permanent closure of the Monaca facility, the hourly plan’s turnover rate was greater than 20% and a partial plan termination was presumed to occur. As a result of the partial plan termination, the accrued benefits of all affected employees became 100% vested. As part of the acquisition of Zochem on November 1, 2011, the Company assumed the pension assets and pension liability for both the hourly and salary pension plans which were in effect at the time of the acquisition. The hourly and salaried plans cover 30 active and 32 non-active employees. These plans are maintained and contributions are made in accordance with the Pension Benefits Act of Ontario, which prescribes the minimum contributions that the Company must make to the plans. Expense related to the plans for the years ended December 31, 2015 and 2014 and 2013 was $37, $44 and $201, respectively. Net periodic benefit costs for the years ended December 31, 2015, 2014 and 2013: 2015 2014 2013 Components of net periodic benefit cost: Service Cost $ 113 $ 135 $ 256 Interest Cost 158 188 202 Expected return on plan assets (218) (260) (257) Amortization of gains (16) (19) — Net periodic benefit cost $ 37 $ 44 $ 201 Net periodic benefit expected to be recognized from the amortization of net gain is estimated to be $23 in 2016. The change in the funded status of the pension plans for the years ended December 31, 2015 and 2014 is as follows: 2015 2014 Change in benefit obligation: Benefit obligation at beginning of period $ 4,576 $ 4,439 Service Cost 140 135 Interest Cost 148 188 Actuarial (gains) losses (5) 550 Currency translation (740) (370) Benefits paid (388) (366) Benefit obligation at end of year $ 3,731 $ 4,576 Change in plan assets: Plan assets at beginning of period $ 4,949 $ 4,839 Expected return on plan assets 242 260 Employer contribution 145 159 Actuarial gains (losses) (228) 461 Currency translation (801) (404) Benefits paid (388) (366) Plan assets at the end of year $ 3,919 $ 4,949 Funded status of Plan $ 188 $ 373 Amounts recognized in the balance sheet consist of: Noncurrent assets - see Footnote M - Deferred finance costs and other $ 188 $ 373 The measurement date for both the hourly and salaried plans was December 31 st The accumulated benefit obligation for all defined benefit pension plans as of December 31, 2015 was $3,731. The expected contributions by the Company for 2016 are estimated to be $169. Benefit payments for pension benefits, which are primarily funded by the pension plan are expected to be paid as follows: 2016 $ 149 2017 149 2018 152 2019 163 2020 166 2021 - 2022 901 The weighted average assumptions as of December 31, 2015 and 2014 were as follows: 2015 2014 Discount rate 4.00% 4.00% Expected return on plan assets 6.00% 6.00% Hourly plan - average salary increase rate 0.00% 0.00% Salaried plan - average salary increase rate* 2.25% 2.50% * per year plus a merit scale These assumptions are used to develop the projected obligation at fiscal year end and to develop net periodic benefit cost for the subsequent fiscal year. Therefore, for fiscal 2015, the assumptions used to determine net periodic benefit costs were established at December 31, 2014, while the assumptions used to determine the benefit obligations were established at December 31, 2015. The Canadian Institute of Actuaries has partnered with Fiera Capital to produce yield curves. The Company determined the appropriate discount rate based on a review of these published yield curves and used the yield curve that most closely matched the characteristics of the plan. The yield curve indicates a discount rate of 4.00% would be appropriate. The Company determines the annual rate of return on pension assets by first analyzing the composition of its asset portfolio. Historical rates of return are applied to the portfolio. The Company’s outside investment advisors and actuaries review the computed rate of return. Industry comparable and other outside guidance are also considered in the annual selection of the expected rates of return on pension assets. The long-term expected rate of return on plan assets takes into account years with exceptional gains and years with exceptional losses. The Company’s planned investment policy for assets of the plans is to obtain a reasonable long-term return consistent with the level of risk assumed. The Company also seeks to control the cost of funding the plans within prudent levels of risk through the investment of plan assets and seeks to provide diversification of assets in an effort to avoid the risk of large losses and to maximize the return to the plans consistent with market and economic risk. The weighted average asset allocation for the Company’s pension plans at December 31, 2015 and 2014 by asset category is as follows: 2015 2014 Equity securities 57.4% 63.9% Debt securities 23.5% 20.8% Cash and other 19.1% 15.3% 100.0% 100.0% The following table sets forth the Company’s pension plan assets at fair value as of December 31, 2015 and 2014. All of the assets are considered to be within Level 2 of the fair value hierarchy. 2015 2014 Canadian large cap securities $ 1,360 $ 1,712 United States equity securities 890 1,450 Canadian fixed income 776 876 Cash 745 752 Other 148 159 $ 3,919 $ 4,949

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	NOTE S—SHARE-BASED COMPENSATION In 2006, the Company adopted the Horsehead Holding Corp. 2006 Long-Term Equity Incentive Plan (the “2006 Plan”), which was amended and restated on June 11, 2007 and which provided for grants of stock options, stock appreciation rights, restricted stock, restricted stock units, deferred stock units and other equity-based awards. Directors, officers and other employees of the Company, as well as others performing services for the Company, were eligible for grants under the 2006 Plan. The 2006 Plan was administered by the compensation committee of the Company’s Board of Directors (the “Committee”). On January 16, 2007, the Board authorized the issuance of options to purchase 1,085 shares of the Company’s common stock to certain officers and employees of the Company under the terms of the 2006 Plan. The options have a term of ten years and vest ratably over a five-year period from date of grant. During 2015 and 2014, options to purchase 3 shares and options to purchase 72 shares, respectively, were exercised and the Company received proceeds of $33 and $941, respectively. At December 31, 2015, there were options to purchase 580 shares still outstanding; all were fully vested and exercisable, each with an exercise price of $13.00 per share and 1.04 years of remaining contractual life. The options outstanding under the 2006 Plan had no intrinsic value at December 31, 2015. The following summarizes the stock option activity under the 2006 Plan: Number of Exercise Options outstanding at December 31, 2012 655 $ 13.00 Exercised in 2013 — — Options outstanding at December 31, 2013 655 $ 13.00 Exercised in 2014 72 13.00 Options outstanding at December 31, 2014 583 $ 13.00 Exercised in 2015 3 13.00 Options outstanding at December 31, 2015 580 $ 13.00 Under the 2006 Plan, the Company also granted restricted stock units which normally vest over a five-year service period or upon the achievement of certain performance goals. The Company assumed a forfeiture rate of zero in estimating compensation expense at the grant date. Upon vesting, the underlying stock will be issued for par value. During the year ended December 31, 2015, 2014 and 2013, 204, 214 and 197, respectively, restricted stock units vested having an intrinsic value of $3,042, $3,553 and $2,109, respectively. The related compensation expense for 2015, 2014 and 2013 was $1,036, $1,405 and $1,313, respectively. Unrecognized compensation expense as of December 31, 2015 is $457. The compensation expense related to the restricted stock units will be recognized as $447 in 2016 and $10 in 2017. As of December 31, 2015, there were 218 restricted stock units outstanding having a remaining contractual life ranging from 1.00 to 1.75 years. The following summarizes the restricted stock units under the 2006 Plan: Number of Exercise Restricted stock units outstanding at December 31, 2012 921 $ 9.81 Vested in 2013 197 8.05 Forfeited in 2013 88 10.03 Restricted stock units outstanding at December 31, 2013 636 $ 10.32 Vested in 2014 214 8.99 Restricted stock units outstanding at December 31, 2014 422 $ 10.99 Vested in 2015 204 11.02 Restricted stock units outstanding at December 31, 2015 218 $ 10.96 On May 17, 2012, the Company adopted the Horsehead Holding Corp. 2012 Incentive Compensation Plan (the “2012 Plan”), after it was approved by the Company’s stockholders at the 2012 Annual Meeting of Stockholders. The 2012 Plan replaced the 2006 Plan, and no further awards, stock options or other grants will be issued under the 2006 Plan. The 2012 Plan provides for grants of stock options, stock appreciation rights, restricted stock, restricted stock units and other cash or equity based awards. Directors, officers and other employees of the Company, as well as others performing consulting or advisory services for the Company, are eligible for grants. The 2012 Plan is administered by the Committee and a total of 2,700 shares of the Company’s common stock were initially authorized for issuance. The number of shares available for issuance under the 2012 Plan is subject to adjustment in the event of a reorganization, stock split, merger or similar change in the corporate structure or the number of outstanding shares of common stock. In the event of any of these occurrences, the Committee may make any adjustments considered appropriate to, among other things, the number and kind of shares, options or other property available for issuance under the 2012 Plan or covered by grants previously made under the 2012 Plan. The shares available for issuance under the 2012 Plan may be, in whole or in part, authorized and unissued or held as treasury shares. If awards under the 2012 Plan are for any reason canceled, or expire or terminate unexercised, the shares covered by such awards may again be available for grant. During the years ended December 31, 2015, 2014 and 2013, the Company granted 126, 133 and 209, respectively, service based restricted stock units with an average grant date fair value of $15.74, $16.11 and $10.54, respectively, per unit. The restricted stock units vest over a one or five-year service period. During the years ended December 31, 2015, 2014 and 2013, the Company granted 106, 109 and 174, respectively, restricted stock units to management based on the future achievement of a predefined level of total shareholder return compared to a group of global metal companies. The fair value at the date of grant during 2015, 2014 and 2013 for these restricted stock units was estimated to be $21.92, $31.15 and $20.62, respectively, per unit, using a valuation model based on commonly accepted economic theory which is used for all valuations of awards with market conditions. This economic theory is also used as the basis for the Black-Scholes and Monte Carlo valuations. The significant assumptions used for the years ending December 31, 2015, 2014 and 2013 were risk free rates of 1.07%, 0.076% and 0.037%, respectively, expected volatility of the Company and each comparator company, no expected dividends and a forfeiture rate of zero. A vesting percentage was then estimated based on the Company’s rank within the comparator group. Upon vesting and the achievement of the required shareholder return, these restricted stock units will be issued for par value. The following summarizes the restricted stock units under the 2012 Plan Number of Exercise Restricted stock units outstanding at December 31, 2012 — Granted in 2013 383 $ 15.10 Forfeited in 2013 7 15.57 Restricted stock units outstanding at December 31, 2013 376 $ 15.10 Granted in 2014 242 23.04 Vested in 2014 36 10.52 Forfeited in 2014 3 23.75 Restricted stock units outstanding at December 31, 2014 579 $ 18.66 Granted in 2015 232 18.56 Vested in 2015 23 15.83 Forfeited in 2015 177 20.59 Restricted stock units outstanding at December 31, 2015 611 $ 18.15 The related compensation expense for all 2012 Plan restricted stock units for the years ended December 31, 2015, 2014 and 2013 were $4,384, $3,363 and $1,897, respectively. The remaining contractual life ranged from 1.00 to 4.50 years. Unrecognized compensation expense as of December 31, 2015 was $5,714. Compensation expense related to the 2012 Plan restricted stock units will be recognized as $2,913 in 2016, $1,791 in 2017, $678 in 2018, $328 in 2019 and $4 in 2020.

Accounting for Derivative Instr

Accounting for Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accounting for Derivative Instruments and Hedging Activities	NOTE T—ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES The Company’s business consists principally of the sale of zinc and nickel-based products. As a result, its results of operations are subject to risk of fluctuations in the market prices of these metals. While the Company’s finished products are generally priced based on a spread to the price of zinc or nickel on the LME, its revenues are impacted significantly by changes in the market prices of these metals. The Company pursues various hedging strategies as described below to reduce its exposure to movements in the prices of zinc and nickel. The Company’s marketing strategy includes a metal hedging program that allows customers to secure a firm price for future deliveries under a sales contract. Hedges are entered into based on firm sales contracts to deliver specified quantities of product on a monthly basis for terms generally not exceeding one year. A portion of the Company’s raw material purchases related to such firm price contracts are at varying zinc prices based on the LME. In order to protect its cash flow related to firm price sales contracts, the Company enters into fixed-to-variable swap contracts to convert the LME-based fixed sales price back to variable. Thus, if raw material costs increase as a result of LME zinc price increases, the related sales value and related cash flows will also increase. As of December 31, 2015, the fixed portions of these zinc contracts ranged from a monthly average of $0.71 to $0.93 per pound for zinc. The Company has hedged approximately 15.7 tons of zinc with fixed-to-variable future swap contracts at December 31, 2015, all of which settle at various dates up to and including December 2016. In January 2016, several brokers required margin calls that the Company could not meet, as a result, most of the zinc fixed-to-variable swap contracts in effect at December 31, 2015 were liquidated. The Company also enters into fixed to variable swap contracts as a financial hedge of a portion of its exposure to the movements in the LME prices of nickel. As of December 31, 2015, the Company had a minimal amount of nickel fixed-to-variable swap contracts outstanding. The Company paid cash of $5,626 and $415 and received cash of $998 from the settlement of swap contracts for the years ended December 31, 2015, 2014 and 2013, respectively. During 2013, the Company purchased put options, to provide protection to operating cash flow in the event that zinc prices decline below that level during the completion of construction and start up of the new zinc facility. The Company received $1,364 from the settlement of put options during 2013. After 2013, the Company did not enter into any put options. In mid 2013, the Company converted a portion of its put options into fixed rate swaps. The sale of the put options resulted in a $1,295 cash benefit, and the Company was able to put the swaps in place without any additional payment. During 2014 and 2015, the Company continued to enter into fixed rate swaps at various strike prices in an effort to reduce volatility during the continued ramp up of production at the new zinc facility. The Company received $19,075, $741 and $1,094, respectively, from the settlement of fixed price swaps during the years ended December 31, 2015, 2014 and 2013. At December 31, 2015, the Company had no remaining put options but had 4.5 tons of fixed price swaps in place at a strike price of $0.83 per pound for the first quarter of 2016. In January 2016, the broker holding our fixed price swap contracts required a margin call that the Company could not meet, as a result, all of the fixed price swap contracts in effect at December 31, 2015 were liquidated. The gains and losses resulting from the Company’s hedging activities are recorded in the Consolidated Statements of Operations as indicated in the table below: 2015 2014 2013 (Losses) gains included in net sales: Options $ — $ (3) $ (3,079) Swaps 14,296 1,383 302 14,296 1,380 (2,777) (Losses) gains included in cost of sales: Swaps (1,233) — — Total gains (losses) resulting from hedging activities $ 13,063 $ 1,380 $ (2,777) The fair value of the swap contracts and put options at December 31, 2015 and 2014 are listed in the table below. Fair Value Measurements Using Significant Other Observable Inputs (Level 2) 2015 2014 Swaps included in Accrued expenses $ 1,275 $ 375 The fair values of derivative instruments are based upon a comparison of third party counterparties valuations to ensure that there is an acceptable level of consistency among them. The swap valuations are based on the official LME closing valuations at the end of the trading day on December 31, 2015, using the mid-point of the closing bid and ask prices on all open swap positions regardless of the holder. The closing prices are supervised by the London Clearing House and are regulated by the Financial Services Authority, the financial regulatory body in the United Kingdom. The Company is exposed to credit loss in cases where counterparties with which they have entered into derivative transactions are unable to pay the Company when they owe the Company funds as a result of agreements with them. To minimize the risk of such losses, the Company uses LME-registered contracts entered into with a London Clearing House member for a portion its contracts and utilizes four different brokers for its hedging program. The Company does not require collateral and does not enter into master netting arrangements. On November 11, 2011, the Company received notification via email from MF Global UK Ltd. (in special administration) that all outstanding Over the Counter (“OTC”) hedge positions would be closed with an effective date of November 1, 2011. The net value of these outstanding OTC positions was $366 and their value was written off during the fourth quarter of 2011. During the first quarter of 2013, the Company sold its rights to any future bankruptcy settlement for these OTC positions to a third party and received $820.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingencies	NOTE U—CONTINGENCIES The Company is subject to federal, state and local laws designed to protect the environment and believes that as a general matter, its policies, practices and procedures are properly designed to reasonably prevent risk of environmental damage and financial liability to the Company. The Company is party to various litigation, claims and disputes, including labor regulation claims and OSHA and environmental regulation violations arising in the ordinary course of business. While the ultimate effect of such actions cannot be predicted with certainty, the Company expects that the outcome of these matters will not result in a material adverse effect on its business, financial condition or results of operations.

Loss Per Share

Loss Per Share	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Loss Per Share	NOTE V—LOSS PER SHARE Basic earnings (loss) per common share (“EPS”) is computed by dividing net income or loss by the weighted average number of common shares outstanding for the period. Diluted earnings per share are computed similarly to basic earnings per share except that the denominator is increased to include the number of shares that would have been outstanding if the potentially dilutive common shares had been issued. The Company uses the treasury stock method when calculating the dilutive effect in its basic EPS calculation. Diluted EPS for periods with a net loss is calculated by dividing the net loss by the weighted average number of basic shares outstanding. The information used to compute basic and diluted loss per share is as follows: 2015 2014 2013 Basic loss per share: Net loss $ (665,388) $ (15,456) $ (13,959) Weighted average shares outstanding – basic 56,632 50,682 45,160 Basic loss per share $ (11.75) $ (0.30) $ (0.31) Diluted loss per share: Net loss $ (665,388) $ (15,456) $ (13,959) Weighted average shares outstanding – diluted 56,632 50,682 45,160 Diluted loss per share $ (11.75) $ (0.30) $ (0.31) Reconciliation of average shares outstanding – basic to average shares outstanding – diluted: Weighted average shares outstanding – basic and diluted 56,632 50,682 45,160 Anti-dilutive shares excluded from earnings per share calculation Exercise Price 2015 2014 2013 Options $ 13.00 580 598 655 Convertible Notes 15.00 — 713 — Restricted Stock Units 969 1,025 1,107 Total 1,549 2,336 1,762 On July 27, 2011, the Company issued $100,000 of Convertible Notes. The Convertible Notes are convertible at a conversion price of approximately $15.00 per share into cash, shares or a combination of both at the Company’s election. According to guidance under ASC 260 Earnings Per Share

Commitments

Commitments	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments	NOTE W—COMMITMENTS Operating Leases The Company has operating leases for equipment and railroad cars which expire at various dates through February 2022. Future minimum lease payments under these non-cancelable operating leases as of December 31, 2015 are as follows: Years Ending December 31, 2016 $ 5,216 2017 3,727 2018 2,325 2019 1,914 2020 1,349 Thereafter 1,330 $ 15,861 Rent expense for all operating leases for 2015, 2014 and 2013 approximated $6,540, $5,480 and $5,219 respectively. Long Term Purchase Agreements At December 31, 2015, the Company was a party to raw material supply agreements through 2016. The agreements require the Company to purchase approximately 41 tons of SHG metal for 2016 at a variable price based on the monthly average LME zinc price plus a premium. Based on the December 2015 average LME zinc price, this purchase commitment is estimated to be approximately $69,403 for 2016.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Accumulated Other Comprehensive Loss	NOTE X—ACCUMULATED OTHER COMPREHENSIVE LOSS Components of accumulated other comprehensive loss consisted of the following at December 31, 2015 and 2014: 2015 2014 Cumulative translation adjustments $ 30 $ 30 Net pension adjustment (net of income tax of $72 and $159 in 2015 and 2014, respectively) 217 504 Accumulated other comprehensive income $ 247 $ 534

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	NOTE Y—SELECTED QUARTERLY FINANCIAL DATA (Unaudited) Quarter Ended December 31 September 30 June 30 March 31 2015 Sales $ 83,007 $ 106,994 $ 122,798 $ 102,144 Cost of sales (excluding depreciation and amortization) 97,055 120,449 120,312 105,844 Depreciation and amortization 13,646 14,188 15,149 11,841 Net loss $ (615,899) $ (27,376) $ (3,619) $ (18,494) Loss per common share: Basic $ (10.56) $ (0.48) $ (0.06) $ (0.34) Diluted $ (10.56) $ (0.48) $ (0.06) $ (0.34) 2014 Sales $ 106,630 $ 110,978 $ 126,265 $ 110,064 Cost of sales (excluding depreciation and amortization) 94,915 103,834 115,410 100,000 Depreciation and amortization 11,910 10,528 8,115 4,853 Net (loss) income $ (4,055) $ (7,010) $ (5,120) $ 729 (Loss) income per common share: Basic $ (0.08) $ (0.14) $ (0.10) $ 0.01 Diluted $ (0.08) $ (0.14) $ (0.10) $ 0.01 During the quarter ended December 31, 2015 the Company recorded an asset impairment charge of $527,621 on the Mooresboro facility.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Information	NOTE Z—SEGMENT INFORMATION In anticipation of the April 2014 closure of the Monaca facility, the Company ceased production of zinc oxide at that facility on December 23, 2013. During 2014, the Company only produced zinc oxide at the Zochem facility. Consequently, effective January 1, 2014, Horsehead Corporation and Zochem did not continue to meet the aggregation criteria as required by ASC 280 Segment Reporting The Company currently reports three segments, Horsehead, Zochem and INMETCO. The Horsehead segment processes EAF dust and other zinc-bearing material to produce and sell zinc and other metals. The Zochem segment produces and sells zinc oxide. The INMETCO segment processes a variety of metal-bearing waste material generated primarily by the specialty steel industry, provides tolling services and produces and sells nickel-chromium-molybdenum-iron remelt alloy to the stainless and specialty steel industries. Accordingly, the 2013 segment information was reclassified to conform to the new segment presentation. The Company records in the Corporate, eliminations and other column of the table below, eliminations related to the exclusion of revenue resulting from EAF dust service fees charged by its Horsehead segment to its INMETCO segment and sales of zinc metal from its Horsehead segment to its Zochem segment, interest expense recorded on debt which is not allocated to its segments and selling, general and administrative expenses related to its corporate division. The following table presents information regarding the Company’s segment presentation: The Year Ended December 31, 2015 Horsehead Zochem INMETCO Corporate, Total Net sales $ 246,474 $ 127,055 $ 47,379 $ (5,965) $ 414,943 Depreciation and amortization 49,448 2,359 3,017 — 54,824 Cost of sales (excluding depreciation and amortization) 302,866 116,194 30,565 (5,965) 443,660 Selling, general and administrative expenses 20,466 2,149 2,622 1,343 26,580 Interest expense 6,639 549 742 31,350 39,280 (Loss) income before income taxes (647,832) 5,639 9,823 (32,677) (665,047) The Year Ended December 31, 2014 Horsehead Zochem INMETCO Corporate, Total Net sales $ 256,609 $ 144,685 $ 54,090 $ (1,447) $ 453,937 Depreciation and amortization 30,608 1,696 3,102 — 35,406 Cost of sales (excluding depreciation and amortization) 254,563 126,846 34,197 (1,447) 414,159 Selling, general and administrative expenses 17,557 2,398 2,654 1,540 24,149 Interest expense 3,308 475 670 17,227 21,680 (Loss) income before income taxes (37,189) 13,554 13,906 (18,701) (28,430) The Year Ended December 31, 2013 Horsehead Zochem INMETCO Corporate, Total Net sales $ 311,914 $ 78,342 $ 53,638 $ (1,958) $ 441,936 Depreciation and amortization 25,607 937 3,134 — 29,678 Cost of sales (excluding depreciation and amortization) 303,980 67,342 35,395 (1,958) 404,759 Selling, general and administrative expenses 15,839 2,244 2,691 1,433 22,207 Interest expense 2,429 228 328 (257) 2,728 (Loss) income before income taxes (40,934) 7,941 12,535 (956) (21,414) December 31, 2015 Horsehead Zochem INMETCO Corporate, Total Property, plant and equipment $ 198,696 $ 24,746 $ 31,399 $ — $ 254,841 Capital expenditures 29,491 815 3,387 — 33,693 Total assets 275,681 70,005 49,655 (3,289) 392,052 December 31, 2014 Horsehead Zochem INMETCO Corporate, Total Property, plant and equipment $ 741,128 $ 26,281 $ 31,684 $ — $ 799,093 Capital expenditures 101,044 8,474 1,307 — 110,825 Total assets 841,954 69,706 59,306 2,551 973,517

Insurance Recoveries

Insurance Recoveries	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Insurance Recoveries	NOTE AA—INSURANCE RECOVERIES On October 28, 2012, a fire occurred at the Company’s INMETCO facility. As INMETCO began its annual maintenance shutdown of the rotary hearth furnace and the submerged arc furnace, it experienced an unrelated fire in the material preparation and blending section of the plant, incurring damage to that portion of the building. The damages from the fire exceeded the Company’s insurance deductible of $500. Through June 30, 2013, the Company had incurred clean up, repair and other costs associated with the fire of $4,580 and a claim was submitted for property damage insurance recovery. The Company was not able to operate at full capacity until mid-December because power was not fully restored to some ancillary operations. All of the repairs associated with the fire were substantially complete by the end of the first quarter of 2013. The Company reached a total final settlement with the insurance carriers of $3,950 during the second quarter of 2013. The additional insurance recoveries of $2,450 is included in Cost of sales of nickel-based material and other services in the Company’s Consolidated Statement of Operations. The cost and insurance recoveries are summarized in the table below: 2013 Property damage insurance recovery $ 2,450 Cost of clean-up and repairs 129 Write off of fixed assets — Gain related to insurance recovery included in cost of sales of nickel-based materials and other services $ 2,321 Insurance proceeds related to fixed assets $ 1,791 Costs capitalized $ 1,791 On November 8, 2015, a fire damaged a battery storage building at our INMETCO facility located in Ellwood City, Pennsylvania. The fire did not affect the facility’s primary operations. The Company maintains property coverage. The damages from the fire exceeded the Company’s insurance deductible of $500. The Company recorded $2,000 in insurance recoveries during the fourth quarter of 2015 relating to property damage and this amount is included in Cost of sales of nickel-based materials and other services in the Company’s Consolidated Statements of Operations. The amount represented a partial settlement of the entire claim and the Company has not yet reached a final settlement with the insurance carriers. Through December 31, 2015, the Company had incurred clean up, repair and other costs associated with the fire of $982. These costs are included in Cost of sales of nickel-based material and other services in the Company’s Consolidated Statement of Operations. The cost and insurance recoveries are summarized in the table below: 2015 Property damage insurance recovery $ 2,000 Cost of clean-up and repairs 64 Write off of inventory 265 Write off of fixed assets 653 Gain related to insurance recovery included in cost of sales of nickel-based materials and other services $ 1,018 Insurance proceeds related to fixed assets $ 254 Costs capitalized $ 254

Guarantor Financial Information

Guarantor Financial Information	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Guarantor Financial Information	NOTE BB—GUARANTOR FINANCIAL INFORMATION The Senior Secured Notes were issued by Horsehead Holding Corp. and are fully and unconditionally guaranteed, on a senior secured basis by its existing and future domestic restricted subsidiaries, other than certain excluded subsidiaries. The Consolidated Financial Statements are presented net of intercompany activity. The following supplemental financial information sets forth on a consolidating basis, balance sheets, statements of operations, statements of comprehensive income (loss), and statements of cash flows for the Company, the subsidiary Guarantors, and the Company’s non-guarantor subsidiaries. The subsidiaries that serve as guarantors are 100% owned as defined in Rule 3-10(h) of Regulation S-X. Horsehead Holding Corp. and Subsidiaries CONSOLIDATED BALANCE SHEET December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Eliminations Total ASSETS Current assets Cash and cash equivalents $ 45 $ 9,215 $ 16,415 $ — $ 25,675 Accounts receivable, net of allowance 75 28,088 14,221 (340) 42,044 Inventories, net — 25,072 15,419 — 40,491 Prepaid expenses and other current assets 3,904 13,158 26 (6,973) 10,115 Deferred income taxes — — — — — Total current assets 4,024 75,533 46,081 (7,313) 118,325 Property, plant and equipment, net — 204,356 50,485 — 254,841 Other assets Intangible assets, net — 9,366 85 — 9,451 Restricted cash — 7,939 — — 7,939 Deferred income taxes — — — — — Investment in and advances to subsidiaries 170,807 (662,599) 283 491,509 — Deferred finance costs and other 14,824 1,308 188 (14,824) 1,496 Total other assets 185,631 (643,986) 556 476,685 18,886 Total assets $ 189,655 $ (364,097) $ 97,122 $ 469,372 $ 392,052 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Current maturities of long-term debt $ 338,483 $ 76,841 $ 32,683 $ (14,928) $ 433,079 Accounts payable 59 53,157 11,147 (265) 64,098 Accrued expenses 3,994 27,258 521 (6,943) 24,830 Total current liabilities 342,536 157,256 44,351 (22,136) 522,007 Long-term debt, less current maturities 10,000 — (10,000) — Other long-term liabilities — 15,467 38 — 15,505 Deferred income taxes — — 3,113 — 3,113 Commitments and contingencies Stockholders’ equity Common stock 602 — — — 602 Preferred stock — — — — — Additional paid-in capital 396,750 41,653 — (41,653) 396,750 Retained earnings (550,233) (592,312) 49,373 543,161 (550,011) Accumulated other comprehensive income — — 247 — 247 Total stockholders’ equity (deficit) before noncontrolling interest (152,881) (550,659) 49,620 501,508 (152,412) Noncontrolling interest — 3,839 — — 3,839 Total stockholders’ equity (deficit) (152,881) (546,820) 49,620 501,508 (148,573) Total liabilities and stockholders’ equity (deficit) $ 189,655 $ (364,097) $ 97,122 $ 469,372 $ 392,052 Horsehead Holding Corp. and Subsidiaries CONSOLIDATED BALANCE SHEET December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Eliminations Total ASSETS Current assets Cash and cash equivalents $ 3,166 $ 15,354 $ 12,194 $ — $ 30,714 Accounts receivable, net of allowance — 40,656 19,740 (154) 60,242 Inventories, net — 43,085 11,923 — 55,008 Prepaid expenses and other current assets 1 10,672 55 (6,973) 3,755 Deferred income taxes — 5,227 24 — 5,251 Total current assets 3,167 114,994 43,936 (7,127) 154,970 Property, plant and equipment, net — 745,612 53,481 — 799,093 Other assets Intangible assets, net — 10,098 94 — 10,192 Investment in and advances to subsidiaries 743,463 (609,021) (1,083) (133,359) — Deferred finance costs and other 21,457 2,140 611 (14,946) 9,262 Total other assets 764,920 (596,783) (378) (148,305) 19,454 Total assets $ 768,087 $ 263,823 $ 97,039 $ (155,432) $ 973,517 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Current maturities of long-term debt $ — $ 3,044 $ — $ — $ 3,044 Accounts payable — 57,913 9,975 (154) 67,734 Accrued expenses 3,994 35,702 2,816 (6,867) 35,645 Total current liabilities 3,994 96,659 12,791 (7,021) 106,423 Long-term debt, less current maturities 334,617 51,744 34,584 (14,929) 406,016 Other long-term liabilities — 17,883 408 — 18,291 Deferred income taxes — 6,642 1,960 — 8,602 Commitments and contingencies Stockholders’ equity Common stock 507 — — — 507 Preferred stock — — — — — Additional paid-in capital 313,815 41,653 — (41,653) 313,815 Retained earnings 115,154 45,290 46,762 (91,829) 115,377 Accumulated other comprehensive loss — — 534 — 534 Total stockholders’ equity (deficit) before noncontrolling interest 429,476 86,943 47,296 (133,482) 430,233 Noncontrolling interest — 3,952 — — 3,952 Total stockholders’ equity (deficit) 429,476 90,895 47,296 (133,482) 434,185 Total liabilities and stockholders’ equity (deficit) $ 768,087 $ 263,823 $ 97,039 $ (155,432) $ 973,517 Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 208,728 $ 127,055 $ (4,656) $ 331,127 Net sales of nickel-based material and other services — 47,379 — 47,379 EAF dust service fees — 37,746 — (1,309) 36,437 Net sales — 293,853 127,055 (5,965) 414,943 Cost of sales of zinc material and other goods — 273,548 116,194 (4,656) 385,086 Cost of sales of nickel-based material and other services — 30,565 — (1,309) 29,256 Cost of EAF dust services — 29,318 — — 29,318 Cost of sales (excluding depreciation and amortization) — 333,431 116,194 (5,965) 443,660 Gain on asset dispositions — (11,029) — — (11,029) Impairment loss — 527,621 — — 527,621 Depreciation and amortization — 51,005 3,819 — 54,824 Selling, general and administrative expenses 1,343 23,078 2,159 — 26,580 Total costs and expenses 1,343 924,106 122,172 (5,965) 1,041,656 (Loss) income from operations (1,343) (630,253) 4,883 — (626,713) Equity in (loss) income of subsidiaries, net of taxes (632,590) — — 632,590 — Other income (expense) Interest expense (32,556) (6,287) (1,643) 1,206 (39,280) Interest and other income 1,101 — 930 (1,085) 946 Total other income (expense) (31,455) (6,287) (713) 121 (38,334) (Loss) income before income taxes (665,388) (636,540) 4,170 632,711 (665,047) Income tax (benefit) provision — (1,103) 1,444 — 341 NET (LOSS) INCOME $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 214,802 $ 144,685 $ — $ 359,487 Net sales of nickel-based material and other services — 54,090 — (70) 54,020 EAF dust service fees — 41,807 — (1,377) 40,430 Net sales — 310,699 144,685 (1,447) 453,937 Cost of sales of zinc material and other goods — 220,615 126,846 (70) 347,391 Cost of sales of nickel-based material and other services — 34,197 — (1,377) 32,820 Cost of EAF dust services — 33,660 — — 33,660 Restructuring expenses — 288 — — 288 Cost of sales (excluding depreciation and amortization) — 288,760 126,846 (1,447) 414,159 Loss on asset dispositions — 915 — — 915 Depreciation and amortization — 32,250 3,156 — 35,406 Selling, general and administrative expenses 1,540 20,211 2,398 — 24,149 Total costs and expenses 1,540 342,136 132,400 (1,447) 474,629 (Loss) income from operations (1,540) (31,437) 12,285 — (20,692) Equity in (loss) income of subsidiaries, net of taxes 3,331 — — (3,331) — Other income (expense) Interest expense (18,181) (2,919) (1,534) 954 (21,680) Interest and other income 934 12,497 1,379 (868) 13,942 Total other income (expense) (17,247) 9,578 (155) 86 (7,738) (Loss) income before income taxes (15,456) (21,859) 12,130 (3,245) (28,430) Income tax (benefit) provision — (16,135) 3,161 — (12,974) NET (LOSS) INCOME $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 267,298 $ 78,342 $ (842) $ 344,798 Net sales of nickel-based material and other services — 53,520 — — 53,520 EAF dust service fees — 43,618 — — 43,618 Net sales — 364,436 78,342 (842) 441,936 Cost of sales of zinc material and other goods — 261,300 67,342 (842) 327,800 Cost of sales of nickel-based material and other services — 34,399 — — 34,399 Cost of EAF dust services — 34,869 — — 34,869 Restructuring expenses — 7,691 — — 7,691 Cost of sales (excluding depreciation and amortization) — 338,259 67,342 (842) 404,759 Loss on asset dispositions — 701 — — 701 Impairment loss — 9,349 — — 9,349 Depreciation and amortization — 27,281 2,397 — 29,678 Selling, general and administrative expenses 1,433 18,520 2,254 — 22,207 Total costs and expenses 1,433 394,110 71,993 (842) 466,694 (Loss) income from operations (1,433) (29,674) 6,349 — (24,758) Equity in (loss) income of subsidiaries, net of taxes (12,917) — — 12,917 — Other income (expense) Interest expense (700) (1,695) (1,290) 957 (2,728) Interest and other income 1,091 4,407 1,445 (871) 6,072 Total other income (expense) 391 2,712 155 86 3,344 (Loss) income before income taxes (13,959) (26,962) 6,504 13,003 (21,414) Income tax (benefit) provision — (9,322) 1,867 — (7,455) NET (LOSS) INCOME $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Other comprehensive loss, net of tax: Net pension liability adjustment — — (287) — (287) Comprehensive (loss) income $ (665,388) $ (635,437) $ 2,439 $ 632,711 $ (665,675) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456) Other comprehensive income, net of tax: Net pension liability adjustment — — (133) — (133) Comprehensive (loss) income $ (15,456) $ (5,724) $ 8,836 $ (3,245) $ (15,589) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959) Other comprehensive (loss) income, net of tax: Net pension liability adjustment — — 911 — 911 Comprehensive (loss) income $ (13,959) $ (17,640) $ 5,548 $ 13,003 $ (13,048) Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 51,005 3,819 — 54,824 Gain on insurance recovery related to fixed assets — (254) — — (254) Deferred income tax benefit — (1,415) 1,177 — (238) Accretion on debt 3,867 — — — 3,867 Accretion on ESOI liabilities — 421 — — 421 Amortization and write-off of deferred finance costs 2,729 2,010 237 — 4,976 Impairment loss — 527,621 — — 527,621 (Gain) loss on asset dispositions — (11,029) — — (11,029) Losses on write down of inventory supplies — 3,054 — — 3,054 Losses (gains) on derivative financial instruments — 1,118 (217) — 901 Lower of cost or market adjustment to inventories — 4,389 — — 4,389 Stock compensation expense 323 5,097 — — 5,420 Capitalization of interest (2,989) — — — (2,989) Equity in loss (income) of subsidiaries, net of taxes 632,590 — — (632,590) — Changes in operating assets and liabilities: (Increase) decrease in accounts receivable, net (74) 12,567 5,519 186 18,198 Decrease (increase) in inventories, net — 7,485 (3,496) — 3,989 (Increase) decrease in prepaid expenses and other current assets (1,614) 29 — (1,585) (Increase) in other assets — (357) (101) (122) (580) Increase (decrease) in accounts payable 59 (4,756) 1,172 (111) (3,636) (Decrease) increase in accrued expenses — (4,906) (2,438) (76) (7,420) (Decrease) in other long-term liabilities — (3,197) (10) — (3,207) Net cash (used in) provided by operating activities (28,883) (48,198) 8,417 (2) (68,666) Cash Flows from Investing Activities: Purchase of property, plant and equipment — (32,878) (815) — (33,693) Insurance proceeds related to fixed assets — 254 — — 254 Increase in restricted cash — (7,939) — — (7,939) Proceeds related to the sale of land — 9,000 — — 9,000 Investment in and advances (to) from subsidiaries (51,848) 53,214 (1,368) 2 — Net cash (used in) provided by investing activities. (51,848) 21,651 (2,183) 2 (32,378) Cash Flows from Financing Activities: Distributions to noncontrolling interest equity holders — — (113) — (113) Borrowings on the Credit Facilities — 58,751 21,200 — 79,951 Repayments on the Credit Facilities — (34,130) (23,100) — (57,230) Debt issuance costs (1,644) — — (1,644) Borrowings on Credit Agreement — 496 — — 496 Repayments on the Credit Agreement — (3,065) — — (3,065) Proceeds from the exercise of stock options 33 — — — 33 Tax effect of share based compensation award exercise and vesting (11) — — — (11) Restricted stock withheld for taxes (441) — — — (441) Net proceeds from the issuance of stock 78,029 — — — 78,029 Net cash provided by (used in) financing activities 77,610 20,408 (2,013) — 96,005 Net (decrease) increase in cash and cash equivalents (3,121) (6,139) 4,221 — (5,039) Cash and cash equivalents at beginning of period 3,166 15,354 12,194 — 30,714 Cash and cash equivalents at end of period $ 45 $ 9,215 $ 16,415 $ — $ 25,675 Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non-Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456 ) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 32,250 3,156 — 35,406 Deferred income tax benefit — (17,068) 712 — (16,356 ) Accretion on debt 3,766 — — — 3,766 Accretion on ESOI liabilities — 431 — — 431 Amortization of deferred finance costs 2,389 314 140 (84) 2,759 Loss on asset dispositions — 915 — — 915 Losses on write down of inventory supplies — 456 — — 456 (Gains) losses on derivative financial instruments — (1,085) 31 — (1,054 ) Lower of cost or market adjustment to inventories — 3,561 — — 3,561 Stock compensation expense 372 4,396 — — 4,768 Capitalization of interest (14,248) (647) — — (14,895 ) Equity in(income) loss of subsidiaries, net of taxes (3,331) — — 3,331 — Changes in operating assets and liabilities: Decrease (increase) in accounts receivable, net — 5,542 (6,825) (275) (1,558 ) Decrease in inventories, net — 7,448 3,103 — 10,551 Decrease (increase) in prepaid expenses and other current assets 7 1,358 (48) — 1,317 (Increase) decrease in other assets — (2,543) (108) 2,017 (634 ) (Decrease) increase in accounts payable — (46,102) (630) 275 (46,457 ) Increase (decrease) in accrued expenses 388 (5,439) (832) (2,019) (7,902 ) (Decrease) increase in other long-term liabilities — (325) 48 — (277 ) Net cash (used in) provided by operating activities (26,113) (22,262) 7,716 — (40,659 ) Cash Flows from Investing Activities: Purchase of property, plant and equipment — (102,351) (8,474) — (110,825 ) Investment in and advances (to) from subsidiaries (122,043) 126,401 (4,358) — — Net cash used in investing activities. (122,043) 24,050 (12,832) — (110,825 ) Cash Flows from Financing Activities: Proceeds from the issuance of debt 51,300 — — — 51,300 Distributions to noncontrolling interest equity holders — — (113) — (113 ) Borrowings on the Credit Facilities — 23,750 9,574 — 33,324 Repayments on the Credit Facilities — (35,420) (174) — (35,594 ) Debt Issuance Costs (1,652) (172) (73) — (1,897 ) Borrowings on the Credit Agreement — 1,555 — — 1,555 Repayments on the Credit Agreement — (2,929) — — (2,929 ) Proceeds from the exercise of stock options 941 — — — 941 Tax effect of share based compensation award exercise and vesting (33) — — — (33 ) Restricted stock withheld for taxes (683) — — — (683 ) Net cash provided by (used in) financing activities 49,873 (13,216) 9,214 — 45,871 Net (decrease) increase in cash and cash equivalents (98,283) (11,428) 4,098 — (105,613 ) Cash and cash equivalents at beginning of period 101,449 26,782 8,096 — 136,327 Cash and cash equivalents at end of period $ 3,166 $ 15,354 $ 12,194 $ — $ 30,714 Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non-Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 27,281 2,397 — 29,678 Gain on insurance recovery related to fixed assets — (1,791) — — (1,791) Deferred income tax benefit — (10,435) 573 — (9,862) Accretion on debt 3,727 — — — 3,727 Accretion on ESOI liabilities — 445 — — 445 Amortization of deferred finance costs 2,114 249 117 (86) 2,394 Impairment loss — 9,349 — — 9,349 Loss on asset dispositions — 701 — — 701 Losses on write down of inventory supplies — 2,738 — — 2,738 Losses on derivative financial instruments — 5,696 23 — 5,719 Lower of cost or market adjustment to inventories — 3,739 — — 3,739 Stock compensation expense 380 2,829 — — 3,209 Capitalization of interest (28,550) (888) — — (29,438) Equity in loss (income) of subsidiaries, net of taxes 12,917 — — (12,917) — Changes in operating assets and liabilities: Decrease (increase) in accounts receivable, net — 3,923 (2,934) 349 1,338 (Increase) in inventories, net — (7,521) (6,865) — (14,386) Decrease (increase) in prepaid expenses and other current assets 21 3,800 3 (425) 3,399 (Increase) decrease in other assets — (125) 28 — (97) (Decrease) increase in accounts payable (93) 26,530 4,164 (349) 30,252 Increase in accrued expenses 112 9,434 2,696 425 12,667 Increase in other long-term liabilities — 2,173 — — 2,173 Net cash (used in) provided by operating activities (23,331) 60,487 4,839 — 41,995 Cash Flows from Investing Activities: Purchase of property, plant and equipment — (300,739) (11,059) — (311,798) Insurance proceeds related to fixed assets — 1,791 — — 1,791 Investment in and advances (to) from subsidiaries (191,243) 191,415 (172) — — Net cash used in investing activities. (191,243) (107,533) (11,231) — (310,007) Cash Flows from Financing Activities: Proceeds from the issuance of debt 21,300 — — — 21,300 Distributions to noncontrolling interest equity holders — — (114) — (114) Borrowings on the Credit Facilities — 51,000 23,500 — 74,500 Repayments on the Credit Facilities — (4,500) (13,500) — (18,000) Debt Issuance Costs (358) (141) (25) — (524) Borrowings on the Credit Agreement — 13,358 — — 13,358 Repayments on the Credit Agreement — (1,866) — — (1,866) Tax effect of share based compensation award exercise and vesting (19) — — — (19) Restricted stock withheld for taxes (411) — — — (411) Net proceeds from the issuance of stock 71,996 — — — 71,996 Net cash provided by financing activities 92,508 57,851 9,861 — 160,220 Net (decrease) increase in cash and cash equivalents (122,066) 10,805 3,469 — (107,792) Cash and cash equivalents at beginning of period 223,515 15,977 4,627 — 244,119 Cash and cash equivalents at end of period $ 101,449 $ 26,782 $ 8,096 $ — $ 136,327

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	NOTE CC—SUBSEQUENT EVENTS Bankruptcy Proceedings During 2015, the Company’s results of operations and liquidity were impacted by (i) the dramatic decline in zinc, nickel and other commodity prices, (ii) continuing issues that delayed the ramp-up of the Mooresboro zinc facility, and (iii) lower EAF dust receipts reflecting weaker steel production. As a result, the Company concluded on January 2, 2016, that it would not make the required interest payment on the Convertible Notes on its scheduled due date of January 4, 2016 exercising a 30-day grace period under the indenture governing such notes. On January 6, 2016 and January 13, 2016, the Company received notices of default, effective November 30, 2015 and December 31, 2015, from PNC Bank related to failure to comply with the required fixed charge coverage ratio under the 2014 Zochem Credit Facility following transfers of funds to Horsehead in 2015. The notice sent on January 13, 2016, demanded immediate payment of all outstanding obligations under the 2014 Zochem Credit Facility. On January 14, 2016, Zochem and the Company entered into a forbearance agreement with PNC Bank. In consideration for the forbearance, Zochem agreed, among other things, to pay a forbearance fee to PNC Bank of $1,000 due and payable on February 1, 2016 and provide a mortgage on Zochem’s currently unencumbered property in Ontario, Canada. The forbearance remained effective until February 1, 2016. On January 5, 2016, the Company received a notice of default from Macquarie related to, among other things, insufficient borrowing base availability under the Macquarie Credit Facility as of December 31, 2015. On January 15, 2016, Horsehead, INMETCO and HMP entered into a forbearance agreement with Macquarie. Pursuant to the forbearance agreement, cash held in certain of the Debtors’ third-party bank accounts was transferred to accounts controlled by Macquarie. Disbursements of funds from the controlled accounts were subject to a budget as specified in the forbearance agreement. Pursuant to the forbearance agreement, the Company agreed, among other things, (i) to pay down to $40,000 outstanding borrowings under the Macquarie Credit Facility and (ii) to pay a restructuring fee in an amount ranging from $1,000 to $2,500 in the event the obligations under the Macquarie Credit Facility are not paid in full by February 1, 2016, with the amount of such fee increasing over time from February 1, 2016 through April 30, 2016. The forbearance remained effective until February 1, 2016. Before the expiration of the grace period under the Convertible Notes indenture and at the expiration of the forbearance agreements, on February 2, 2016, the Debtors filed voluntary petitions for relief pursuant to Chapter 11 of the Bankruptcy Code in the Bankruptcy Court. On the same date, Zochem, as foreign representative of the Debtors, commenced a proceeding in the Ontario Superior Court of Justice (Commercial List) to recognize the Debtors Chapter 11 cases as a foreign main proceeding. The Debtors continue to operate their businesses as debtors-in-possession subject to the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code and orders of the Bankruptcy Court. The filing of the Chapter 11 petitions constituted an event of default under the Debtors’ various credit facilities and series of notes and rendered the financial obligations under certain such instruments automatically and immediately due and payable. See Note N - Long-Term Debt. On April 13, 2016, the Debtors filed a proposed Chapter 11 plan with the Bankruptcy Court and on April 14, 2016, a related Disclosure Statement. The Debtors’ Second Amended Joint Plan of Reorganization Pursuant to Chapter 11 of the Bankruptcy Code (with Technical Modifications) was confirmed and approved by the Bankruptcy Court on September 9, 2016. Entry into Unit Purchase and Support Agreement On July 11, 2016, the Company, on behalf of the Debtors, entered into a Unit Purchase and Support Agreement (the “ UPA Plan Sponsors Pursuant to the UPA, and subject to approvals, terms, and conditions set forth therein, upon emergence from Chapter 11, (i) the Company will issue units of limited liability company interests of the reorganized Company to the Plan Sponsors who will purchase such Plan Sponsor’s respective percentage of an aggregate amount equal to $160 million (the “Emergence Equity Units”), and (ii) the Plan Sponsors had the right to elect, on or prior to July 29, 2016, to commit to purchase up to an additional $100 million units of limited liability company interests of the reorganized Company, with such commitment being exercisable at the election of the reorganized Company’s board of directors pursuant to the terms and subject to the conditions of the UPA, following the effectiveness of the Plan. The additional capital commitment was fully subscribed. The UPA provides for the payment by the Company to the Plan Sponsors of a termination fee equal to $7.5 million in the event the UPA is terminated under certain conditions set forth therein, including the failure to meet specific milestones. The Debtors have also agreed to pay certain fees and expenses of the Plan Sponsors. Pursuant to the UPA and subject to the conditions set forth therein, the Company and the other Debtors and the Plan Sponsors have agreed to support and, in the case of the Plan Sponsors, vote their claims in favor of the Plan and to cooperate in completing the documentation of and effectuating the Plan. The Company and the other Debtors have further agreed not to solicit or engage in any discussions with third parties regarding an Alternative Transaction (as defined in the UPA), provided that, as more fully set forth therein, the UPA permits the Company’s board of directors to negotiate unsolicited proposals for an Alternative Transaction that constitutes, or is reasonably likely to lead to or result in, a Superior Proposal (as defined in the UPA); provided that such agreements are subject in all respects to the Company’s and the Debtors’ rights and obligations pursuant to the Order (I) Extending the Debtors Exclusive Periods to File a Chapter 11 Plan and Solicit Acceptances Thereof Pursuant to Section 1121 of the Bankruptcy Code and (II) Granting Related Relief Pursuant to the UPA and subject to the conditions set forth therein, the Company and the other Debtors have agreed to, jointly and severally, indemnify and hold harmless each Plan Sponsor and certain related parties from and against losses, claims, damages, liabilities and costs and expenses arising out of or in connection with the UPA, the Plan, the Chapter 11 proceedings, the recognition proceedings in Canada, and the transactions contemplated thereby. The UPA also includes customary representations of the parties; provided that pursuant to the UPA, Zochem, Inc., a Debtor, will have no liability to any person under or relating to the UPA. The UPA was approved by the Bankruptcy Court pursuant to an order entered on September 9, 2016. The Emergence Equity Units and the Additional Capital Commitment Units, if issued, will not be registered under the Securities Act of 1933, as amended (the “Securities Act”), and will not be transferable unless subsequently registered under the Securities Act or an exemption from registration is available. The Company does not intend to register the Emergence Equity Units and the Additional Capital Commitment Units. Moreover, the Emergence Equity Units and the Additional Capital Commitment Units, if any, will be subject to, and each holder thereof will be a party to, that certain Limited Liability Company Agreement of the reorganized Company to be entered into and effective immediately following the effectiveness of the Plan. Entry into Debtor-in-Possession Credit Agreement On February 8, 2016, the Debtors entered into a Senior Secured Superpriority Debtor-in-Possession Credit, Security and Guaranty Agreement (the “DIP Credit Agreement”), with certain holders of the Company’s Senior Secured Notes, as lenders (the “DIP Lenders”), and Cantor Fitzgerald Securities, as administrative agent (the “DIP Agent”). The entry into the DIP Credit Agreement was approved by the Bankruptcy Court. The DIP Credit Agreement was amended on March 3, 2016, May 16, 2016, June 23, 2016, August 1, 2016 and September 15, 2016. The DIP Credit Agreement provides for a senior secured super priority credit facility in the aggregate principal amount of up to $90,000 (the “DIP Facility”). Initial proceeds from the DIP Facility were used, among other things, to repay in full and terminate all obligations under the 2014 Zochem Facility, pay fees and expenses incurred through the closing date of the DIP Facility and pay other amounts permitted in the budget (including any permitted variances) and for general corporate purposes. Interest on the outstanding principal amount of loans under the DIP Facility is payable monthly in arrears at a per annum rate equal to 14.0%. Upon an event of default under the DIP Facility, all obligations under the DIP Credit Agreement bear interest at a rate equal to the standard interest rate plus an additional 2.0% per annum. The Debtors were required to pay commitment fees and are required to pay unused commitment fees. With certain exceptions, the obligations under the DIP Credit Agreement are secured by a “priming,” first-priority lien on substantially all of the Debtors’ assets. The liens securing the DIP Facility prime the liens securing the Senior Secured Notes and include a first priority priming lien on the equity interests of non-debtor subsidiaries of the Debtors, including Horsehead Zinc Recycling, LLC. The DIP Facility matures on the earlier of (a) February 8, 2017, (b) the earlier of (i) the date of the substantial consummation of the plan of reorganization that is confirmed pursuant to an order of the Bankruptcy Court and recognized by an order of the Canadian Court, (ii) the consummation of a sale of all or substantially all of the assets of the Debtors pursuant to Section 363 of the Bankruptcy Code, and (iii) the date any outstanding extensions of credit under the DIP Facility become due and payable in accordance with the terms of the loan documents, whether by acceleration or otherwise. Pursuant to the DIP Credit Agreement, the Debtors must meet certain financial requirements and covenants, including a minimum restructuring EBITDA covenant with respect to each of INMETCO and Zochem (“EBITDA-R Covenant”). On March 22, 2016, the Company delivered a notice of default to the DIP Agent relating to the Company’s failure to meet the Zochem EBITDA-R Covenant for the period ended February 29, 2016. The Company amended the DIP Credit Agreement on May 16, 2016 for the EBITDA-R Covenant for Zochem. The Company was subject to default interest on outstanding borrowings until an agreement was reached. Default under and subsequent termination of the NMTC arrangement On January 22, 2016, the minority equity holders issued Notices of Non-Payment to the Company as a result of annual payments not being made in accordance with various agreements. These notices resulted in events of default under the NMTC arrangement. On June 16, 2016, HZR, Horsehead and the Company, as guarantor, entered into the following Forbearance Agreements (the “Forbearances”): (1) with respect to the Loan Agreement, dated as of May 29, 2009 (the “BAML Loan Agreement”), with Bank of America CDE III, LLC, as lender (“BAML”), and (2) with respect to the Loan Agreement, dated as of May 29, 2009 (together with the BAML Loan Agreement, the “NMTC Loan Agreements”), with CCM Community Development IV LLC, as lender (together with BAML, the “Lenders”). Pursuant to the Forbearances, the Lenders agreed to temporarily forbear from exercising enforcement actions related to certain events of default related to the failure to pay accrued and unpaid interest under the NMTC Loan Agreements and certain other events of default arising from the Company and the Debtors commencing voluntary petitions for reorganization under Chapter 11 of the Bankruptcy Code in the Bankruptcy Court on February 2, 2016. The Forbearances will be effective until the earliest of (i) July 15, 2016; (ii) the substantial consummation of the Chapter 11 cases by the Debtors; (iii) the dismissal of the Chapter 11 cases or conversion of such cases to cases under Chapter 7 of the Bankruptcy Code; and (iv) the occurrence of any event of default under the NMTC Loan Agreements, which continues for a period of 30 days from notice by the Lenders, other than those events of default that resulted from the Debtors’ commencing the Chapter 11 cases. In consideration for the Forbearances, HZR, Horsehead and the Company agreed, among other things, to pay forbearance fees to each Lender of $100 upon execution of the Forbearances. On June 24, 2016, HZR repaid in full (i) an aggregate amount of $121 outstanding under the Loan Agreement, dated as of May 29, 2009, between HZR, as borrower, and Bank of America CDE III, LLC, as lender (the “BAML Loan Agreement”), and (ii) an aggregate amount of $757 outstanding under the Loan Agreement, dated as of May 29, 2009, between HZR, as borrower, and CCM Community Development IV LLC, as lender (together with the BAML Loan Agreement, the “NMTC Loan Agreements”). The NMTC Loan Agreements terminated by their terms upon repayment. Temporary Idling of Mooresboro Facility On January 22, 2016 the Company temporarily idled the Mooresboro facility in the face of severe liquidity constraints and the Company’s determination that the facility was incapable of generating positive cash flow in the future without significant additional capital investment and/or a recovery in commodity prices. A small workforce has been retained to manage the facility during this period. On February 2, 2016, the Company filed voluntary petitions for relief pursuant to Chapter 11 of the Bankruptcy Code in Bankruptcy Court. At that time, the Company did not have the capacity to raise additional capital. The Company concluded that additional expenditures upwards of $117,000 were required to bring the Mooresboro facility back online and make needed improvements to cure the identified operational issues. This information along with the filing for bankruptcy protection resulted in the Company determining a triggering event had occurred to further test impairment of the long-lived assets at the Mooresboro facility. The Company was unable to estimate future cash flows as the property was idled and there was no certainty as to whether funds were available to cure the operational defect. As such the Company proceeded to step 2 of the impairment test where we compared the implied fair value of operating invested capital of Horsehead to the fair value of our operating segments and determined the fair value of the Mooresboro facility to be essentially the liquidation value. The significant assumption in the analysis was that the Mooresboro facility would remain idle indefinitely until suitable funds were available to cure the significant operational defects. As a result of the analysis, we recorded a non-cash, pre-tax long-lived asset impairment loss of $54,266 for the Mooresboro asset group at March 31, 2016. Following the write-down of the asset group, the remaining book value of the Mooresboro facility is $31,284 at March 31, 2016. Tecnicas Reunidas, S.A. Settlement In January 2016, Horsehead Corporation reached a settlement agreement with one of the primary contractors for work associated with the construction of portions of the Mooresboro facility, Tecnicas Reunidas, S.A (“TR”). The agreement settled all known claims and disputes between Horsehead Corporation and TR relating to the construction of the Mooresboro facility. As a result, in 2016, the Company recorded a net settlement amount of approximately $7.2 million, of which $5 million was recorded as a loan payable to TR. The Company has evaluated subsequent events through May 31, 2016 and determined there were no other significant subsequent events that required adjustments or disclosures to the consolidated financial statements.

Schedule I_ Condensed Financial

Schedule I: Condensed Financial Information of Parent Company	12 Months Ended
	Dec. 31, 2015
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule I: Condensed Financial Information of Parent Company	Schedule I: Condensed Financial Information of Parent Company HORSEHEAD HOLDING CORP. CONDENSED BALANCE SHEETS - PARENT COMPANY ONLY December 31, 2015 and 2014 (Amounts in thousands) ASSETS 2015 2014 Cash and cash equivalents $ 45 $ 3,166 Prepaid expenses and other current assets 75 1 Loan receivable 14,824 14,823 Other assets 3,904 6,634 Investment in and advances to subsidiary 170,807 743,463 Total assets $ 189,655 $ 768,087 LIABILITIES AND STOCKHOLDERS’ EQUITY Current maturities of long term debt $ 338,483 $ — Accounts payable 59 — Accrued expenses 3,994 3,994 Long term debt — 334,617 Stockholders’ equity Common stock 602 507 Additional paid-in capital 396,750 313,815 Retained earnings (550,233) 115,154 Total stockholders’ equity (152,881) 429,476 Total liabilities and stockholders’ equity $ 189,655 $ 768,087 See note to condensed financial statements of the parent company HORSEHEAD HOLDING CORP. CONDENSED STATEMENTS OF OPERATIONS - PARENT COMPANY ONLY For the years ended December 31, 2015, 2014 and 2013 (Amounts in thousands) 2015 2014 2013 Selling, general and administrative $ 1,343 $ 1,540 $ 1,433 Equity in (loss) income of subsidiary, net of tax provision of $341 and tax benefits of $12,974 and $7,455 for 2015, 2014 and 2013, respectively (632,590) 3,331 (12,917) Interest income 1,101 934 1,091 Interest expense 32,556 18,181 700 Loss before taxes (665,388) (15,456) (13,959) Income taxes — — — NET LOSS $ (665,388) $ (15,456) $ (13,959) See note to condensed financial statements of the parent company HORSEHEAD HOLDING CORP. CONDENSED STATEMENTS OF CASH FLOWS - PARENT COMPANY ONLY For the years ended December 31, 2015, 2014 and 2013 (Amounts in thousands) 2015 2014 2013 Cash Flows from Operating Activities: Net loss $ (665,388) $ (15,456) $ (13,959) Adjustments to reconcile net loss to net cash used in operating activities: Equity in loss (income) of subsidiary 632,590 (3,331) 12,917 Non-cash compensation expense 323 372 380 Accretion on debt 3,867 3,766 3,727 Amortization of deferred finance costs 2,729 2,389 2,114 Capitalization of interest (2,989) (14,248) (28,550) Changes in operating assets and liabilities: (Increase) in accounts receivable (74) — — Decrease in prepaid expenses and other current assets — 7 21 Decrease (increase) in accounts payable 59 — (93) (Decrease) increase in accrued expenses — 388 112 Net cash used in operating activities (28,883) (26,113) (23,331) Cash Flows from Investing Activities: Advances to subsidiaries (51,848) (122,043) (191,243) Net cash used in investing activities (51,848) (122,043) (191,243) Cash Flows from Financing Activities: Proceeds from the issuance of debt — 51,300 21,300 Debt issuance costs — (1,652) (358) Proceeds from the exercise of stock options 33 941 — Tax effect of share based compensation award exercise and vesting (11) (33) (19) Restricted stock withheld for taxes (441) (683) (411) Net proceeds from the issuance of stock 78,029 — 71,996 Net cash provided by financing activities 77,610 49,873 92,508 Net decrease in cash and cash equivalents (3,121) (98,283) (122,066) Cash and cash equivalents at beginning of period 3,166 101,449 223,515 Cash and cash equivalents at end of period $ 45 $ 3,166 $ 101,449 See note to condensed financial statements of the parent company HORSEHEAD HOLDING CORP. NOTE TO CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY NOTE 1.

Summary of Significant Accoun38

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on the Company’s historical experience and its expectations of the future and on various other assumptions that are believed to be reasonable under the circumstances. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition The Company recognizes revenues from the sale of finished goods when persuasive evidence of a sales arrangement exists which includes a fixed or determinable price, when passage of title or risk of loss has occurred (which is generally at the time of shipment) and when collectability is reasonably assured. The Company recognizes service fee revenue when persuasive evidence of a sales arrangement exists which includes a fixed or determinable price, passage of title or risk of loss has occurred (which is generally at the time of receipt of EAF dust that the Company collects from steel mini-mill operators) and when collectability is reasonably assured. The components of net sales for the years ended December 31, 2015, 2014 and 2013 are as follows: 2015 2014 2013 Zinc and nickel material goods $ 336,484 $ 372,661 $ 363,075 Service fee revenue 67,029 73,494 73,423 Other 11,430 7,782 5,438 $ 414,943 $ 453,937 $ 441,936 One customer comprised 10% and 11% of consolidated net sales for the years ended December 31, 2015 and 2014, respectively. No customer exceeded 10% of consolidated net sales for the year ended December 31, 2013. Our ten largest customers comprised 43%, 44% and 34% of our consolidated net sales in 2015, 2014 and 2013, respectively. Products and services are sold primarily to customers in the hot-dipped galvanizing, rubber, stainless steel and mini-mill markets.
Shipping and Handling Fees and Costs	Shipping and Handling Fees and Costs The Company classifies all amounts billed to a customer in a sales transaction related to shipping and handling as revenue. The Company records shipping and handling costs incurred in cost of sales.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with maturities of approximately 90 days or less when purchased to be cash equivalents.
Accounts Receivable	Accounts Receivable The majority of the Company’s accounts receivable are due from customers primarily in the steel, rubber and galvanizing industries. Credit is extended based on an evaluation of a customer’s financial condition. Generally collateral is not required. Accounts receivable are stated at amounts due from customers net of an allowance for doubtful accounts. Accounts receivable outstanding longer than the contractual payment terms are considered past due. The Company determines its allowance by considering a number of factors, including the length of time trade accounts receivable are past due, the Company’s previous loss history, the customer’s current ability to pay its obligation to the Company and the condition of the general economy and industry as a whole. The Company writes off accounts receivable when they become uncollectible. Payments subsequently received on such receivables are credited to the allowance for doubtful accounts. The provision (benefit) for bad debt was $184, $(122) and $(19) for 2015, 2014, and 2013, respectively. No customer comprised 10% or more of consolidated accounts receivable at December 31, 2015. One customer comprised 17% of consolidated accounts receivable at December 31, 2014. Ten customers comprised 46% of consolidated accounts receivable at both December 31, 2015 and 2014, respectively.
Inventories	Inventories Inventories, which consist primarily of zinc and nickel-bearing materials, chemical reagents and supplies and spare parts are valued at the lower-of-cost-or-market (“LCM”) using a weighted average actual cost method. Zochem values its inventory using the first-in first-out method. Raw materials are purchased, as well as produced, from the processing of EAF dust. Supplies and spare parts inventory used in the production process are purchased and depending on the type of supply or spare part are either classified as long-term supplies, capitalized until consumption, or expensed immediately. Work-in-process and finished goods inventories are valued based on the costs of raw materials plus applicable conversion costs, including depreciation and overhead costs relating to associated process facilities. Zinc and nickel are traded as commodities on the London Metals Exchange (“LME”) and, accordingly, product inventories are subject to price fluctuations. When reviewing inventory for LCM adjustments, the Company considers the forward metal prices as quoted on the LME as of the reporting date in determining its estimate of net realizable value and to determine if an adjustment is required. The Company’s product revenues are based on the current or prior months’ LME average prices. The LME average price upon which product revenue is based has been reasonably correlated with the forward LME price that is used to determine lower of cost or market adjustments. Supplies are not subject to LME LCM adjustments. See Footnote H - Inventories Supplies are adjusted based on obsolescence and slow moving reviews. The Company records an estimate for slow moving and obsolete inventory (“inventory reserve”) based upon our product knowledge, physical inventory observation, future demand, market conditions and an aging analysis of the inventory on hand. For “convenience,” the Company reduces inventory cost through a contra asset rather than through a new cost basis.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost or acquisition date fair value. Depreciation is provided using the straight-line method. Ordinary maintenance and repairs are expensed as incurred; replacements and betterments are capitalized if they extend the useful life of the related asset. The estimated useful lives of property, plant and equipment are as follows: Buildings, land and building improvements 3 - 40 years Machinery and equipment 3 - 30 years
Environmental Obligations	Environmental Obligations The Company accrues for costs associated with environmental obligations when such costs are probable and can be reasonably estimated. Accruals for estimated costs are adjusted as further information develops or circumstances change and long-term accruals are discounted.
Insurance Claim Liabilities	Insurance Claim Liabilities The Company accrues for costs associated with self-insured retention under certain insurance policies (primarily workers’ compensation) based on estimates of claims, including projected development, from information provided by the third party administrator and a third party actuarial firm. Accruals for estimated costs are undiscounted and are subject to change based on development of such claims. Changes in the estimates of the reserves are included in net income in the period determined. Amounts estimated to be paid within one year have been classified as current liabilities, with the remainder included in non-current liabilities in the Consolidated Balance Sheets.
Asset Retirement Obligations	Asset Retirement Obligations The fair values of asset retirement obligations are recognized in the period they are incurred if a reasonable estimate of fair value can be made. Asset retirement obligations primarily relate to environmental remediation at three Company locations. The liability is estimated based upon cost studies prepared to estimate environmental remediation upon closure and for purposes of obtaining state permits to operate the facilities. The liability is discounted using the Company’s estimated credit-adjusted risk free interest rate at the time the obligations are recognized.
Contingencies	Contingencies During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings. The Company assesses contingencies as to whether they are probable and estimable and records its best estimate of the potential loss. Legal costs associated with these contingencies are recorded as incurred. As a result of their bankruptcy filings, substantially all proceedings pending against the Debtors have been stayed by operation of Section 362(a) of the Bankruptcy Code.
Income Taxes	Income Taxes Deferred income taxes reflect the tax consequences on future years of differences between the tax basis of assets and liabilities and their respective financial reporting amounts. The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority.
Comprehensive Income (Loss)	Comprehensive Income (Loss) The term “comprehensive income (loss)” represents the change in stockholders’ equity from transactions and other events and circumstances resulting from non-stockholder sources. The Company’s other comprehensive income or loss, consisting of pension liability adjustments (net of tax), is reported separately in the accompanying Consolidated Statements of Comprehensive Loss.
Share-Based Compensation	Share-Based Compensation The Company has a share-based compensation plan. Employee stock options are expensed by the Company over the requisite service period, based on the estimated fair value of the award on the date of the grant using the Black-Scholes option-pricing model. Restricted stock unit service or performance related grants are expensed by the Company over the vesting period, with the expense measured based on the stock price on the grant-date multiplied by the number of restricted stock units granted. Restricted stock unit market based grants are expensed by the Company over the vesting period, with the expense determined using a valuation model based on commonly accepted economic theory which is used for all valuations of awards with market conditions. This economic theory is also used as a basis for the Black Scholes and Monte Carlo valuations.
Fair Value	Fair Value Fair value is measured using inputs from the three levels of the fair value hierarchy. Classification within the hierarchy is determined based on the lowest level of input that is significant to the fair value measurement. The three levels are described as follows: • Level 1 - Unadjusted quoted prices in active markets for identical assets and liabilities. Cash and cash equivalents including the money market demand account, accounts receivable, accounts payable, and certain accrued expenses are considered to be in Level 1 of the fair value hierarchy as they approximate their fair value due to the short-term nature of these instruments. (see Note G - Cash and Cash Equivalents • Level 2 - Inputs other than quoted prices included in Level 1 that are observable for the determination of the fair value of the asset or liability, either directly or indirectly. Financial swaps and financial option instruments are carried at fair value and are considered to be in level 2 of the fair value hierarchy. These derivatives are not designated as cash flow hedges and the Company recognizes changes in fair value within the consolidated statements of operations as they occur (see Note T - Accounting for Derivative Instruments and Hedging Activities Long Term Debt Pension assets, which are primarily invested in the Manulife Monthly High Income GIF Fund, are carried at fair value and are considered to be in Level 2 of the fair value hierarchy (see Note R - Employee Benefit Plans • Level 3 - Unobservable inputs that are significant to the determination of fair value of the asset or liability. The Convertible Notes, issued on July 27, 2011, were initially valued at fair value and subsequently are carried at amortized cost. The fair value is considered to be in Level 3 of the fair value hierarchy (see Note N - Long-Term Debt Long-Term Debt When developing the fair value measurements, the Company uses quoted market prices whenever available or seeks to maximize the use of observable inputs and minimize the use of unobservable inputs when quoted market prices are not available.
Derivatives	Derivatives The Company does not enter into derivative financial instruments unless it has an existing asset or obligation or anticipates a future activity that could result in exposing it to market risk. The Company uses various strategies to manage its market risk, including the use of derivative instruments to limit, offset or reduce such risk. Derivative financial instruments are used to manage well-defined commodity price risks from the Company’s primary business activity. The Company records derivative instruments in current assets or current liabilities in the Consolidated Balance Sheets at fair value. These derivatives are not designated as cash flow hedges and the Company recognizes changes in fair value within the Consolidated Statements of Operations as they occur. The fair values of derivative instruments are based upon a comparison of third party counterparties valuations, with whom the Company has entered into substantially identical derivative contracts, to ensure that there is an acceptable level of consistency among them. The valuations utilize forward pricing and an implied volatility of the underlying commodity as well as interest rate forwards and are therefore subject to fluctuation based on the movements of the commodity markets. Cash flows from derivatives are recognized in the Consolidated Statements of Cash Flows in a manner consistent with the underlying transactions. The Company is exposed to credit loss should counter-parties or clearing agents with which it has entered into derivative transactions become unable to satisfy their obligations in accordance with the underlying agreements. To reduce the risk of such losses, at points in time, the Company utilizes LME-registered contracts entered into with the London Clearing House for some of its contracts. In addition, the Company minimizes credit loss by utilizing four different brokers for its derivative contracts (see Note T - Accounting for Derivative Instruments and Hedging Activities
Foreign Currency Translation	Foreign Currency Translation The functional currency of the Company’s Zochem subsidiary, is the U.S. dollar. A portion of Zochem’s sales, however, and certain other costs remain in the Canadian Dollar and are converted to U.S. Dollars at month end. The resulting translation effect is included in the Consolidated Statements of Operations.
Earnings (Loss) per Share	Earnings (Loss) per Share Basic earnings (loss) per share are calculated using the weighted-average shares of common stock outstanding. Diluted earnings per share includes the additional effect of other securities, if dilutive, in which case the dilutive effect of such securities is calculated using the treasury stock method (See Note V - Earnings per Share
Impairment	Impairment Long lived assets, which include property, plant and equipment as well as definite life intangible assets, are reviewed for impairment when events and circumstances indicate that the carrying amount of an asset may not be recoverable. The Company’s policy is to record an impairment loss when it is determined that the carrying amount of the asset exceeds the sum of the expected undiscounted future cash flows resulting from use of the asset, and its eventual disposition. Impairment losses are measured as the amount by which the carrying amount of the asset exceeds its fair value, normally as determined in either open market transactions or through the use of a discounted cash flow model. Long lived assets to be disposed of are reported at the lower of the carrying amount or fair value less cost to sell. In assessing the recoverability of our long-lived assets, management may be required to make assumptions regarding estimated future cash flows and other factors to determine the fair value of the respective assets. This process is subjective and requires judgment at many points throughout the analysis. If such estimates or their related assumptions change in subsequent periods or if actual cash flows or other market measures are below management’s estimates, the Company may be required to record impairment charges for these assets not previously recorded or additional impairments on assets already recorded. The Company recorded an impairment loss on its Mooresboro facility in December 2015. See Footnote F- Asset Write-Downs and Disposals We have no goodwill or indefinite life intangible assets.
Acquisitions	Acquisitions The Company recognizes the assets acquired and the liabilities assumed at their fair values as of the acquisition date. Contingent purchase consideration is recorded at fair value at the date of acquisition. Measuring assets and liabilities at fair value requires the Company to determine the price that would be paid by a third party market participant based on the highest and best use of the assets or interest acquired. The excess of the purchase price over the fair value of the net assets acquired is recorded as goodwill. The excess of the fair value of the net assets acquired over the purchase price is recorded as a bargain purchase gain. Acquisition costs are expensed as incurred.
Supplemental Disclosure of Cash Flow Information	Supplemental Disclosure of Cash Flow Information Cash paid for interest in 2015, 2014 and 2013 was $32,420, $28,743 and $24,721, respectively. Cash paid for interest in 2015, 2014 and 2013 includes interest capitalized of $2,989, $13,942 and $23,809, respectively. Due to the significance of interest capitalized during the construction of the Mooresboro facility, consistent with the Company’s policy for presentation of capitalized interest on capital intense projects such as Mooresboro within the consolidated statements of cash flows, cash from operations in the Company’s Consolidated Statement of Cash Flows for the years ended December 31, 2015, 2014 and 2013, have been adjusted to properly reflect payments related to servicing debt. Cash paid for income taxes in 2015, 2014 and 2013 was $2,760, $1,041 and $2,584, respectively. During 2015, the Company recorded a non-cash investing item as it reclassified $3,085 of supplies inventory to property, plant and equipment.
Variable Interest Entities	Variable Interest Entities Investments in other entities are accounted for using the consolidation, equity or cost basis method depending upon the Company’s level of ownership, ability to exercise significant influence over the operating and financial policies of the investee and whether the Company is determined to be the primary beneficiary of a variable interest in an entity. In December 2013, HMP entered into a joint venture known as ThirtyOx, LLC (“ThirtyOx”) with Imperial Acquisitions LLC for the acquisition and processing of zinc bearing secondary materials. The processing operation is located in North Carolina near the Company’s zinc facility in Mooresboro, North Carolina. When the zinc facility resumes operations and achieves better production levels than prior to idling, we expect that the majority of the feedstock for the zinc facility will be supplied by Horsehead’s EAF dust recycling plants. ThirtyOx is expected to supply a portion of the incremental zinc feed required by the zinc facility by recovering secondary zinc oxides from the residues generated by galvanizers, die casters and other users of zinc metal. The ThirtyOx facility became operational in August 2014. HMP’s anticipated investment in ThirtyOx is expected to be less than $2,000. HMP’s net investment in ThirtyOx is $340 at December 31, 2015. ThirtyOx was determined to be a variable interest entity as its significant activities are directed by a management agreement and not the equity group. HMP has determined that although it does have influence on ThirtyOx, it is not the primary beneficiary of the variable interest. HMP accounts for its investment in ThirtyOx utilizing the equity method of accounting as it does not own over 50% of the joint venture. HMP has recorded its cash contributions to ThirtyOx as an investment which is increased or decreased by its respective share of ThirtyOx pretax income or loss. The Company has determined that HMP’s interest in ThirtyOx is not individually significant to its consolidated balance sheet and income statement and therefore is not required to provide additional disclosures regarding its involvement with this joint venture.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Adopted In August 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40) - Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern - Organization and Basis of Presentation In April 2014, the FASB issued ASU No. 2014-08 (“ASU 2014-8”), Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360)-Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes Income Taxes Issued In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). The pronouncement was issued to provide more decision-useful information about the expected credit losses on financial instruments and changes the loss impairment methodology. This pronouncement is effective for reporting periods beginning after December 15, 2019 using a modified retrospective adoption method. A prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the effective date. The impact of the adoption of ASU 2016-13 is not expected to have a significant impact on the Company’s consolidated financial position or results of operations. In March 2016 the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) In July 2015, the FASB issued ASU No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Topic 835) Presentation and Subsequent Measurement of Debt Issuance Cost Associated with Line-of-Credit Arrangements (Topic 835) In February 2015, The FASB issued ASU No. 2015-02, Consolidation (Topic 810) In May 2014, the FASB and the International Accounting Standards Board (“IASB”) jointly issued ASU No. 2014-9, Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) There have been no other recently issued accounting updates that had or may have a material impact on the Company’s Consolidated Financial Statements.

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Components of Net Sales	The components of net sales for the years ended December 31, 2015, 2014 and 2013 are as follows: 2015 2014 2013 Zinc and nickel material goods $ 336,484 $ 372,661 $ 363,075 Service fee revenue 67,029 73,494 73,423 Other 11,430 7,782 5,438 $ 414,943 $ 453,937 $ 441,936
The Estimated Useful Lives of Property, Plant and Equipment	The estimated useful lives of property, plant and equipment are as follows: Buildings, land and building improvements 3 - 40 years Machinery and equipment 3 - 30 years

Restructuring Expenses (Tables)

Restructuring Expenses (Tables)	12 Months Ended
	Dec. 31, 2015
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs	The restructuring accrual was as follows: Accrual at October 31, 2013 $ 7,517 Adjustments to previously recorded restructuring charges 174 Cash payments (9) Accrual at December 31, 2013 7,682 Adjustments to previously recorded restructuring charges 288 Cash payments (7,509) Remaining accrual at December 31, 2014 461 Cash payments (461) Remaining accrual at December 31, 2015 $ —

Asset Write-Downs and Disposa41

Asset Write-Downs and Disposals (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Schedule of Net Book Value of Mooresboro Facility After Impairment	The breakdown of the net book value of the Mooresboro facility after impairment is as follows: December 31, 2015 net book value of the Mooresboro facility prior to impairment charge $ 614,117 Impairment charge (527,621) Supplies inventory included in construction in progress 1,147 Net book value of Mooresboro facility after impairment charge $ 87,643

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	12 Months Ended
	Dec. 31, 2015
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents	Cash and cash equivalents consisted of the following at December 31, 2015 and 2014: 2015 2014 Cash in bank $ 25,675 $ 30,497 Money market demand account — 217 $ 25,675 $ 30,714

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following at December 31, 2015 and 2014: 2015 2014 Raw materials $ 12,230 $ 17,493 Work-in-process 2,776 2,847 Finished goods 19,545 21,885 Supplies and spare parts 10,458 18,345 45,009 60,570 Excess and obsolete inventory reserves (4,518) (5,562) $ 40,491 $ 55,008

Prepaid Expenses and Other Cu44

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	Prepaid expenses and other current assets consisted of the following at December 31, 2015 and 2014: 2015 2014 Deferred finance costs 4,705 — Other 5,410 3,755 $ 10,115 $ 3,755

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment consisted of the following at December 31, 2015 and 2014. 2015 2014 Land and land improvements $ 24,437 $ 50,117 Buildings and building improvements 41,083 96,904 Machinery and equipment 299,009 736,815 Construction in progress 8,847 33,556 373,376 917,392 Less accumulated depreciation (118,535) (118,299) $ 254,841 $ 799,093

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	Intangible assets consisted of the following at December 31, 2015 and 2014: 2015 2014 Customer contracts $ 10,915 $ 10,915 Customer relationships 1,518 2,068 Non-compete agreements 789 789 Trademark 812 812 Technology 400 930 14,434 15,514 Less accumulated amortization (4,983) (5,322) $ 9,451 $ 10,192

Deferred Finance Costs and Ot47

Deferred Finance Costs and Other (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Schedule of Deferred Finance Cost and Other	Deferred finance costs and other at December 31, 2015 and 2014 consisted of the following: 2015 2014 Deferred finance costs $ — $ 8,042 Other 1,496 1,220 $ 1,496 $ 9,262

Long - Term Debt (Tables)

Long - Term Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt consisted of the following at December 31, 2015 and 2014: 2015 2014 Loan Payable, related to New Market Tax Credit program $ 255 $ 255 3.80% Convertible Senior Notes due July 2017, net of debt discount 93,403 89,448 10.50% Senior Secured Notes due June 2017, including the debt premium 205,081 205,169 9.00% Senior Unsecured Notes due July 2017 40,000 40,000 ABL Facility, interest payable at variable rates — 14,830 Zochem Credit Facility, interest payable at variable rates 17,500 19,400 INMETCO Credit Facility, interest payable at variable rates — 20,000 Macquarie Credit Facility, interest payable at variable rates 59,451 — Credit Agreement, interest payable at variable rates 17,389 19,958 433,079 409,060 Less portion currently payable 433,079 3,044 $ — $ 406,016

Accrued Expenses (Tables)

Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Schedule of Accrued Expenses	Accrued expenses at December 31, 2015 and 2014 consisted of the following: 2015 2014 Employee related costs $ 5,868 $ 5,717 EAF dust processing reserve 3,336 3,684 Workers’ compensation insurance claim liabilities 1,500 1,500 Unearned tolling revenue 1,305 2,434 Accrued sales tax 2,291 950 Accrued interest 4,534 4,473 Accrued hedge contracts 1,275 375 Accrued insurance 1,749 1,767 Unearned contractual services — 3,976 Other 2,972 10,769 $ 24,830 $ 35,645

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The components of loss before income taxes for the years ending December 31 are as follows: 2015 2014 2013 United States $ (670,686) $ (41,984) $ (29,355) Canada 5,639 13,554 7,941 $ (665,047) $ (28,430) $ (21,414)
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax provision (benefit) for the years ended December 31, 2015, 2014 and 2013 are as follows: 2015 2014 2013 Current provision (benefit) Federal $ 325 $ — $ — State and local (45) 1,072 1,154 Foreign 227 2,294 1,271 507 3,366 2,425 Deferred (benefit) provision: Federal (5,955) (12,681) (10,888) State and local 4,575 (4,385) 457 Foreign 1,214 726 551 (166) (16,340) (9,880) Income tax provision (benefit) $ 341 $ (12,974) $ (7,455)
Schedule of Effective Income Tax Rate Reconciliation	The reconciliation between income tax provision (benefit) and the amount computed by applying the statutory federal income tax rate of 35% to loss before income taxes is as follows: 2015 2014 2013 Income taxes at statutory rate $ (232,766) $ (9,950) $ (7,495) State and local income taxes, net of federal tax effect (11,693) (2,093) 1,047 State tax credit (185,974) — — Valuation allowance 419,386 — — Executive compensation — 364 230 Research and development credit — (80) (139) Undistributed foreign earnings 10,942 — — Section 956 deemed dividend 569 — — Withholding tax 325 — — Foreign rate differential (565) (1,256) (794) Other 117 41 (304) Income tax provision (benefit) $ 341 $ (12,974) $ (7,455)
Schedule of Deferred Tax Assets and Liabilities	The components of the Company’s net deferred tax asset (liability) at December 31, 2015 and 2014 are as follows: 2015 2014 Deferred tax assets: Accrued fringe benefits 412 $ 104 Prepaid hedge contracts 507 90 Stock compensation 5,668 4,628 State tax credits 188,171 2,197 State net operating loss carry forward 10,152 7,534 Federal net operating loss carry forward 120,215 49,003 Inventory 8,363 1,205 Accrued workers compensation — 901 Partnership allocations 552 70 Property, plant and equipment 96,473 — Other 5,772 7,563 Gross deferred tax asset 436,285 73,295 Valuation reserve (422,091) (2,706) Net deferred tax asset 14,194 70,589 Deferred tax liabilities: Property, plant and equipment — (67,452) Deferred financing costs (2,425) (4,090) Undistributed foreign earnings (12,488) — Intangible assets (645) (704) Other (1,749) (1,694) Total deferred tax liabilities (17,307) (73,940) Net deferred tax liability $ (3,113) $ (3,351)
Deferred Tax Assets Net Classification	The above deferred tax assets and liabilities at December 31, 2015 and 2014 have been included in the Company’s consolidated balance sheets as follows: 2015 2014 Current deferred tax asset $ — $ 5,251 Current deferred tax liability — — Net current deferred tax asset — 5,251 Non-current deferred tax asset — — Non-current deferred tax liability (3,113) (8,602) Net non-current deferred tax liability (3,113) (8,602) Net deferred tax liability $ (3,113) $ (3,351)
Summary of Net Operating Loss and Tax Credit Carryforwards	The details of our U.S. federal and state net operating loss carryforwards and U.S. state tax credit carryforwards as of December 31, 2015 are summarized as follows: U.S. Federal U.S. State U.S. State Net Operating Loss Net Operating Loss Credit Generated Expiration Carryforwards Carryforwards Carryforwards 2010 - 2015 2030 - 2035 $ 343,473 $ — $ — 2004 - 2015 2016 - 2035 — 243,418 — 2007 - 2015 2017 - 2039 — — 188,171 $ 343,473 $ 243,418 $ 188,171

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Schedule of Other Long-Term Liabilities	Other long-term liabilities at December 31, 2015 and 2014 consisted of the following: 2015 2014 Environmental obligations $ 567 $ 620 Insurance claim liabilities 5,603 7,753 Asset retirement obligations 5,123 4,775 Deferred purchase price obligation 3,538 3,769 Other 674 1,374 $ 15,505 $ 18,291

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Postemployment Benefits [Abstract]
Schedule of Net Periodic Benefit Costs	Net periodic benefit costs for the years ended December 31, 2015, 2014 and 2013: 2015 2014 2013 Components of net periodic benefit cost: Service Cost $ 113 $ 135 $ 256 Interest Cost 158 188 202 Expected return on plan assets (218) (260) (257) Amortization of gains (16) (19) — Net periodic benefit cost $ 37 $ 44 $ 201
Schedule of Changes in Funded Status of Pension Plans	The change in the funded status of the pension plans for the years ended December 31, 2015 and 2014 is as follows: 2015 2014 Change in benefit obligation: Benefit obligation at beginning of period $ 4,576 $ 4,439 Service Cost 140 135 Interest Cost 148 188 Actuarial (gains) losses (5) 550 Currency translation (740) (370) Benefits paid (388) (366) Benefit obligation at end of year $ 3,731 $ 4,576 Change in plan assets: Plan assets at beginning of period $ 4,949 $ 4,839 Expected return on plan assets 242 260 Employer contribution 145 159 Actuarial gains (losses) (228) 461 Currency translation (801) (404) Benefits paid (388) (366) Plan assets at the end of year $ 3,919 $ 4,949 Funded status of Plan $ 188 $ 373 Amounts recognized in the balance sheet consist of: Noncurrent assets - see Footnote M - Deferred finance costs and other $ 188 $ 373
Expected Benefit Payments for Pension Benefits	Benefit payments for pension benefits, which are primarily funded by the pension plan are expected to be paid as follows: 2016 $ 149 2017 149 2018 152 2019 163 2020 166 2021 - 2022 901
Summary of Weighted Average Assumptions	The weighted average assumptions as of December 31, 2015 and 2014 were as follows: 2015 2014 Discount rate 4.00% 4.00% Expected return on plan assets 6.00% 6.00% Hourly plan - average salary increase rate 0.00% 0.00% Salaried plan - average salary increase rate* 2.25% 2.50% * per year plus a merit scale
Weighted Average Asset Allocation for Company's Pension Plans	The weighted average asset allocation for the Company’s pension plans at December 31, 2015 and 2014 by asset category is as follows: 2015 2014 Equity securities 57.4% 63.9% Debt securities 23.5% 20.8% Cash and other 19.1% 15.3% 100.0% 100.0%
Company's Pension Plan Assets at Fair Value	he following table sets forth the Company’s pension plan assets at fair value as of December 31, 2015 and 2014. All of the assets are considered to be within Level 2 of the fair value hierarchy. 2015 2014 Canadian large cap securities $ 1,360 $ 1,712 United States equity securities 890 1,450 Canadian fixed income 776 876 Cash 745 752 Other 148 159 $ 3,919 $ 4,949

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Schedule of Option Activity	The following summarizes the stock option activity under the 2006 Plan: Number of Exercise Options outstanding at December 31, 2012 655 $ 13.00 Exercised in 2013 — — Options outstanding at December 31, 2013 655 $ 13.00 Exercised in 2014 72 13.00 Options outstanding at December 31, 2014 583 $ 13.00 Exercised in 2015 3 13.00 Options outstanding at December 31, 2015 580 $ 13.00
2006 Plan [Member]
Schedule of Restricted Stock Units Activity	The following summarizes the restricted stock units under the 2006 Plan: Number of Exercise Restricted stock units outstanding at December 31, 2012 921 $ 9.81 Vested in 2013 197 8.05 Forfeited in 2013 88 10.03 Restricted stock units outstanding at December 31, 2013 636 $ 10.32 Vested in 2014 214 8.99 Restricted stock units outstanding at December 31, 2014 422 $ 10.99 Vested in 2015 204 11.02 Restricted stock units outstanding at December 31, 2015 218 $ 10.96
2012 Plan [Member]
Schedule of Restricted Stock Units Activity	The following summarizes the restricted stock units under the 2012 Plan Number of Exercise Restricted stock units outstanding at December 31, 2012 — Granted in 2013 383 $ 15.10 Forfeited in 2013 7 15.57 Restricted stock units outstanding at December 31, 2013 376 $ 15.10 Granted in 2014 242 23.04 Vested in 2014 36 10.52 Forfeited in 2014 3 23.75 Restricted stock units outstanding at December 31, 2014 579 $ 18.66 Granted in 2015 232 18.56 Vested in 2015 23 15.83 Forfeited in 2015 177 20.59 Restricted stock units outstanding at December 31, 2015 611 $ 18.15

Accounting for Derivative Ins54

Accounting for Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Gains and Losses Resulting from Company's Hedging Activities	The gains and losses resulting from the Company’s hedging activities are recorded in the Consolidated Statements of Operations as indicated in the table below: 2015 2014 2013 (Losses) gains included in net sales: Options $ — $ (3) $ (3,079) Swaps 14,296 1,383 302 14,296 1,380 (2,777) (Losses) gains included in cost of sales: Swaps (1,233) — — Total gains (losses) resulting from hedging activities $ 13,063 $ 1,380 $ (2,777)
Schedule of Fair Value of Swap Contracts and Put Options	The fair value of the swap contracts and put options at December 31, 2015 and 2014 are listed in the table below. Fair Value Measurements Using Significant Other Observable Inputs (Level 2) 2015 2014 Swaps included in Accrued expenses $ 1,275 $ 375

Loss Per Share (Tables)

Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Schedule of Information Used to Compute Basic and Diluted Loss Per Share	The information used to compute basic and diluted loss per share is as follows: 2015 2014 2013 Basic loss per share: Net loss $ (665,388) $ (15,456) $ (13,959) Weighted average shares outstanding – basic 56,632 50,682 45,160 Basic loss per share $ (11.75) $ (0.30) $ (0.31) Diluted loss per share: Net loss $ (665,388) $ (15,456) $ (13,959) Weighted average shares outstanding – diluted 56,632 50,682 45,160 Diluted loss per share $ (11.75) $ (0.30) $ (0.31) Reconciliation of average shares outstanding – basic to average shares outstanding – diluted: Weighted average shares outstanding – basic and diluted 56,632 50,682 45,160
Schedule of Anti-dilutive Shares Excluded from Earnings Per Share Calculation	Anti-dilutive shares excluded from earnings per share calculation Exercise Price 2015 2014 2013 Options $ 13.00 580 598 655 Convertible Notes 15.00 — 713 — Restricted Stock Units 969 1,025 1,107 Total 1,549 2,336 1,762

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Future Minimum Lease Payments Under Non-Cancelable Operating Leases	Future minimum lease payments under these non-cancelable operating leases as of December 31, 2015 are as follows: Years Ending December 31, 2016 $ 5,216 2017 3,727 2018 2,325 2019 1,914 2020 1,349 Thereafter 1,330 $ 15,861

Accumulated Other Comprehensi57

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss	Components of accumulated other comprehensive loss consisted of the following at December 31, 2015 and 2014: 2015 2014 Cumulative translation adjustments $ 30 $ 30 Net pension adjustment (net of income tax of $72 and $159 in 2015 and 2014, respectively) 217 504 Accumulated other comprehensive income $ 247 $ 534

Selected Quarterly Financial 58

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Information	Quarter Ended December 31 September 30 June 30 March 31 2015 Sales $ 83,007 $ 106,994 $ 122,798 $ 102,144 Cost of sales (excluding depreciation and amortization) 97,055 120,449 120,312 105,844 Depreciation and amortization 13,646 14,188 15,149 11,841 Net loss $ (615,899) $ (27,376) $ (3,619) $ (18,494) Loss per common share: Basic $ (10.56) $ (0.48) $ (0.06) $ (0.34) Diluted $ (10.56) $ (0.48) $ (0.06) $ (0.34) 2014 Sales $ 106,630 $ 110,978 $ 126,265 $ 110,064 Cost of sales (excluding depreciation and amortization) 94,915 103,834 115,410 100,000 Depreciation and amortization 11,910 10,528 8,115 4,853 Net (loss) income $ (4,055) $ (7,010) $ (5,120) $ 729 (Loss) income per common share: Basic $ (0.08) $ (0.14) $ (0.10) $ 0.01 Diluted $ (0.08) $ (0.14) $ (0.10) $ 0.01

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Information	The following table presents information regarding the Company’s segment presentation: The Year Ended December 31, 2015 Horsehead Zochem INMETCO Corporate, Total Net sales $ 246,474 $ 127,055 $ 47,379 $ (5,965) $ 414,943 Depreciation and amortization 49,448 2,359 3,017 — 54,824 Cost of sales (excluding depreciation and amortization) 302,866 116,194 30,565 (5,965) 443,660 Selling, general and administrative expenses 20,466 2,149 2,622 1,343 26,580 Interest expense 6,639 549 742 31,350 39,280 (Loss) income before income taxes (647,832) 5,639 9,823 (32,677) (665,047) The Year Ended December 31, 2014 Horsehead Zochem INMETCO Corporate, Total Net sales $ 256,609 $ 144,685 $ 54,090 $ (1,447) $ 453,937 Depreciation and amortization 30,608 1,696 3,102 — 35,406 Cost of sales (excluding depreciation and amortization) 254,563 126,846 34,197 (1,447) 414,159 Selling, general and administrative expenses 17,557 2,398 2,654 1,540 24,149 Interest expense 3,308 475 670 17,227 21,680 (Loss) income before income taxes (37,189) 13,554 13,906 (18,701) (28,430) The Year Ended December 31, 2013 Horsehead Zochem INMETCO Corporate, Total Net sales $ 311,914 $ 78,342 $ 53,638 $ (1,958) $ 441,936 Depreciation and amortization 25,607 937 3,134 — 29,678 Cost of sales (excluding depreciation and amortization) 303,980 67,342 35,395 (1,958) 404,759 Selling, general and administrative expenses 15,839 2,244 2,691 1,433 22,207 Interest expense 2,429 228 328 (257) 2,728 (Loss) income before income taxes (40,934) 7,941 12,535 (956) (21,414) December 31, 2015 Horsehead Zochem INMETCO Corporate, Total Property, plant and equipment $ 198,696 $ 24,746 $ 31,399 $ — $ 254,841 Capital expenditures 29,491 815 3,387 — 33,693 Total assets 275,681 70,005 49,655 (3,289) 392,052 December 31, 2014 Horsehead Zochem INMETCO Corporate, Total Property, plant and equipment $ 741,128 $ 26,281 $ 31,684 $ — $ 799,093 Capital expenditures 101,044 8,474 1,307 — 110,825 Total assets 841,954 69,706 59,306 2,551 973,517

Insurance Recoveries (Tables)

Insurance Recoveries (Tables)	12 Months Ended
	Dec. 31, 2015
INMETCO [Member]
Schedule of costs and insurance recoveries	The cost and insurance recoveries are summarized in the table below: 2013 Property damage insurance recovery $ 2,450 Cost of clean-up and repairs 129 Write off of fixed assets — Gain related to insurance recovery included in cost of sales of nickel-based materials and other services $ 2,321 Insurance proceeds related to fixed assets $ 1,791 Costs capitalized $ 1,791 2015 Property damage insurance recovery $ 2,000 Cost of clean-up and repairs 64 Write off of inventory 265 Write off of fixed assets 653 Gain related to insurance recovery included in cost of sales of nickel-based materials and other services $ 1,018 Insurance proceeds related to fixed assets $ 254 Costs capitalized $ 254

Guarantor Financial Informati61

Guarantor Financial Information (Tables)	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Consolidated Balance Sheets	Horsehead Holding Corp. and Subsidiaries CONSOLIDATED BALANCE SHEET December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Eliminations Total ASSETS Current assets Cash and cash equivalents $ 45 $ 9,215 $ 16,415 $ — $ 25,675 Accounts receivable, net of allowance 75 28,088 14,221 (340) 42,044 Inventories, net — 25,072 15,419 — 40,491 Prepaid expenses and other current assets 3,904 13,158 26 (6,973) 10,115 Deferred income taxes — — — — — Total current assets 4,024 75,533 46,081 (7,313) 118,325 Property, plant and equipment, net — 204,356 50,485 — 254,841 Other assets Intangible assets, net — 9,366 85 — 9,451 Restricted cash — 7,939 — — 7,939 Deferred income taxes — — — — — Investment in and advances to subsidiaries 170,807 (662,599) 283 491,509 — Deferred finance costs and other 14,824 1,308 188 (14,824) 1,496 Total other assets 185,631 (643,986) 556 476,685 18,886 Total assets $ 189,655 $ (364,097) $ 97,122 $ 469,372 $ 392,052 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Current maturities of long-term debt $ 338,483 $ 76,841 $ 32,683 $ (14,928) $ 433,079 Accounts payable 59 53,157 11,147 (265) 64,098 Accrued expenses 3,994 27,258 521 (6,943) 24,830 Total current liabilities 342,536 157,256 44,351 (22,136) 522,007 Long-term debt, less current maturities 10,000 — (10,000) — Other long-term liabilities — 15,467 38 — 15,505 Deferred income taxes — — 3,113 — 3,113 Commitments and contingencies Stockholders’ equity Common stock 602 — — — 602 Preferred stock — — — — — Additional paid-in capital 396,750 41,653 — (41,653) 396,750 Retained earnings (550,233) (592,312) 49,373 543,161 (550,011) Accumulated other comprehensive income — — 247 — 247 Total stockholders’ equity (deficit) before noncontrolling interest (152,881) (550,659) 49,620 501,508 (152,412) Noncontrolling interest — 3,839 — — 3,839 Total stockholders’ equity (deficit) (152,881) (546,820) 49,620 501,508 (148,573) Total liabilities and stockholders’ equity (deficit) $ 189,655 $ (364,097) $ 97,122 $ 469,372 $ 392,052 Horsehead Holding Corp. and Subsidiaries CONSOLIDATED BALANCE SHEET December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Eliminations Total ASSETS Current assets Cash and cash equivalents $ 3,166 $ 15,354 $ 12,194 $ — $ 30,714 Accounts receivable, net of allowance — 40,656 19,740 (154) 60,242 Inventories, net — 43,085 11,923 — 55,008 Prepaid expenses and other current assets 1 10,672 55 (6,973) 3,755 Deferred income taxes — 5,227 24 — 5,251 Total current assets 3,167 114,994 43,936 (7,127) 154,970 Property, plant and equipment, net — 745,612 53,481 — 799,093 Other assets Intangible assets, net — 10,098 94 — 10,192 Investment in and advances to subsidiaries 743,463 (609,021) (1,083) (133,359) — Deferred finance costs and other 21,457 2,140 611 (14,946) 9,262 Total other assets 764,920 (596,783) (378) (148,305) 19,454 Total assets $ 768,087 $ 263,823 $ 97,039 $ (155,432) $ 973,517 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Current maturities of long-term debt $ — $ 3,044 $ — $ — $ 3,044 Accounts payable — 57,913 9,975 (154) 67,734 Accrued expenses 3,994 35,702 2,816 (6,867) 35,645 Total current liabilities 3,994 96,659 12,791 (7,021) 106,423 Long-term debt, less current maturities 334,617 51,744 34,584 (14,929) 406,016 Other long-term liabilities — 17,883 408 — 18,291 Deferred income taxes — 6,642 1,960 — 8,602 Commitments and contingencies Stockholders’ equity Common stock 507 — — — 507 Preferred stock — — — — — Additional paid-in capital 313,815 41,653 — (41,653) 313,815 Retained earnings 115,154 45,290 46,762 (91,829) 115,377 Accumulated other comprehensive loss — — 534 — 534 Total stockholders’ equity (deficit) before noncontrolling interest 429,476 86,943 47,296 (133,482) 430,233 Noncontrolling interest — 3,952 — — 3,952 Total stockholders’ equity (deficit) 429,476 90,895 47,296 (133,482) 434,185 Total liabilities and stockholders’ equity (deficit) $ 768,087 $ 263,823 $ 97,039 $ (155,432) $ 973,517
Schedule of Consolidated Statements of Operations	Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 208,728 $ 127,055 $ (4,656) $ 331,127 Net sales of nickel-based material and other services — 47,379 — 47,379 EAF dust service fees — 37,746 — (1,309) 36,437 Net sales — 293,853 127,055 (5,965) 414,943 Cost of sales of zinc material and other goods — 273,548 116,194 (4,656) 385,086 Cost of sales of nickel-based material and other services — 30,565 — (1,309) 29,256 Cost of EAF dust services — 29,318 — — 29,318 Cost of sales (excluding depreciation and amortization) — 333,431 116,194 (5,965) 443,660 Gain on asset dispositions — (11,029) — — (11,029) Impairment loss — 527,621 — — 527,621 Depreciation and amortization — 51,005 3,819 — 54,824 Selling, general and administrative expenses 1,343 23,078 2,159 — 26,580 Total costs and expenses 1,343 924,106 122,172 (5,965) 1,041,656 (Loss) income from operations (1,343) (630,253) 4,883 — (626,713) Equity in (loss) income of subsidiaries, net of taxes (632,590) — — 632,590 — Other income (expense) Interest expense (32,556) (6,287) (1,643) 1,206 (39,280) Interest and other income 1,101 — 930 (1,085) 946 Total other income (expense) (31,455) (6,287) (713) 121 (38,334) (Loss) income before income taxes (665,388) (636,540) 4,170 632,711 (665,047) Income tax (benefit) provision — (1,103) 1,444 — 341 NET (LOSS) INCOME $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 214,802 $ 144,685 $ — $ 359,487 Net sales of nickel-based material and other services — 54,090 — (70) 54,020 EAF dust service fees — 41,807 — (1,377) 40,430 Net sales — 310,699 144,685 (1,447) 453,937 Cost of sales of zinc material and other goods — 220,615 126,846 (70) 347,391 Cost of sales of nickel-based material and other services — 34,197 — (1,377) 32,820 Cost of EAF dust services — 33,660 — — 33,660 Restructuring expenses — 288 — — 288 Cost of sales (excluding depreciation and amortization) — 288,760 126,846 (1,447) 414,159 Loss on asset dispositions — 915 — — 915 Depreciation and amortization — 32,250 3,156 — 35,406 Selling, general and administrative expenses 1,540 20,211 2,398 — 24,149 Total costs and expenses 1,540 342,136 132,400 (1,447) 474,629 (Loss) income from operations (1,540) (31,437) 12,285 — (20,692) Equity in (loss) income of subsidiaries, net of taxes 3,331 — — (3,331) — Other income (expense) Interest expense (18,181) (2,919) (1,534) 954 (21,680) Interest and other income 934 12,497 1,379 (868) 13,942 Total other income (expense) (17,247) 9,578 (155) 86 (7,738) (Loss) income before income taxes (15,456) (21,859) 12,130 (3,245) (28,430) Income tax (benefit) provision — (16,135) 3,161 — (12,974) NET (LOSS) INCOME $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF OPERATIONS For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net sales of zinc material and other goods $ — $ 267,298 $ 78,342 $ (842) $ 344,798 Net sales of nickel-based material and other services — 53,520 — — 53,520 EAF dust service fees — 43,618 — — 43,618 Net sales — 364,436 78,342 (842) 441,936 Cost of sales of zinc material and other goods — 261,300 67,342 (842) 327,800 Cost of sales of nickel-based material and other services — 34,399 — — 34,399 Cost of EAF dust services — 34,869 — — 34,869 Restructuring expenses — 7,691 — — 7,691 Cost of sales (excluding depreciation and amortization) — 338,259 67,342 (842) 404,759 Loss on asset dispositions — 701 — — 701 Impairment loss — 9,349 — — 9,349 Depreciation and amortization — 27,281 2,397 — 29,678 Selling, general and administrative expenses 1,433 18,520 2,254 — 22,207 Total costs and expenses 1,433 394,110 71,993 (842) 466,694 (Loss) income from operations (1,433) (29,674) 6,349 — (24,758) Equity in (loss) income of subsidiaries, net of taxes (12,917) — — 12,917 — Other income (expense) Interest expense (700) (1,695) (1,290) 957 (2,728) Interest and other income 1,091 4,407 1,445 (871) 6,072 Total other income (expense) 391 2,712 155 86 3,344 (Loss) income before income taxes (13,959) (26,962) 6,504 13,003 (21,414) Income tax (benefit) provision — (9,322) 1,867 — (7,455) NET (LOSS) INCOME $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959)
Schedule of Consolidated Statements of Comprehensive Income (Loss)	Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Other comprehensive loss, net of tax: Net pension liability adjustment — — (287) — (287) Comprehensive (loss) income $ (665,388) $ (635,437) $ 2,439 $ 632,711 $ (665,675) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456) Other comprehensive income, net of tax: Net pension liability adjustment — — (133) — (133) Comprehensive (loss) income $ (15,456) $ (5,724) $ 8,836 $ (3,245) $ (15,589) Horsehead Holding Corp. and Subsidiaries CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Net (loss) income $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959) Other comprehensive (loss) income, net of tax: Net pension liability adjustment — — 911 — 911 Comprehensive (loss) income $ (13,959) $ (17,640) $ 5,548 $ 13,003 $ (13,048)
Schedule of Consolidated Statements of Cash Flows	Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2015 (Amounts in thousands) Issuer Guarantors Non- Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (665,388) $ (635,437) $ 2,726 $ 632,711 $ (665,388) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 51,005 3,819 — 54,824 Gain on insurance recovery related to fixed assets — (254) — — (254) Deferred income tax benefit — (1,415) 1,177 — (238) Accretion on debt 3,867 — — — 3,867 Accretion on ESOI liabilities — 421 — — 421 Amortization and write-off of deferred finance costs 2,729 2,010 237 — 4,976 Impairment loss — 527,621 — — 527,621 (Gain) loss on asset dispositions — (11,029) — — (11,029) Losses on write down of inventory supplies — 3,054 — — 3,054 Losses (gains) on derivative financial instruments — 1,118 (217) — 901 Lower of cost or market adjustment to inventories — 4,389 — — 4,389 Stock compensation expense 323 5,097 — — 5,420 Capitalization of interest (2,989) — — — (2,989) Equity in loss (income) of subsidiaries, net of taxes 632,590 — — (632,590) — Changes in operating assets and liabilities: (Increase) decrease in accounts receivable, net (74) 12,567 5,519 186 18,198 Decrease (increase) in inventories, net — 7,485 (3,496) — 3,989 (Increase) decrease in prepaid expenses and other current assets (1,614) 29 — (1,585) (Increase) in other assets — (357) (101) (122) (580) Increase (decrease) in accounts payable 59 (4,756) 1,172 (111) (3,636) (Decrease) increase in accrued expenses — (4,906) (2,438) (76) (7,420) (Decrease) in other long-term liabilities — (3,197) (10) — (3,207) Net cash (used in) provided by operating activities (28,883) (48,198) 8,417 (2) (68,666) Cash Flows from Investing Activities: Purchase of property, plant and equipment — (32,878) (815) — (33,693) Insurance proceeds related to fixed assets — 254 — — 254 Increase in restricted cash — (7,939) — — (7,939) Proceeds related to the sale of land — 9,000 — — 9,000 Investment in and advances (to) from subsidiaries (51,848) 53,214 (1,368) 2 — Net cash (used in) provided by investing activities. (51,848) 21,651 (2,183) 2 (32,378) Cash Flows from Financing Activities: Distributions to noncontrolling interest equity holders — — (113) — (113) Borrowings on the Credit Facilities — 58,751 21,200 — 79,951 Repayments on the Credit Facilities — (34,130) (23,100) — (57,230) Debt issuance costs (1,644) — — (1,644) Borrowings on Credit Agreement — 496 — — 496 Repayments on the Credit Agreement — (3,065) — — (3,065) Proceeds from the exercise of stock options 33 — — — 33 Tax effect of share based compensation award exercise and vesting (11) — — — (11) Restricted stock withheld for taxes (441) — — — (441) Net proceeds from the issuance of stock 78,029 — — — 78,029 Net cash provided by (used in) financing activities 77,610 20,408 (2,013) — 96,005 Net (decrease) increase in cash and cash equivalents (3,121) (6,139) 4,221 — (5,039) Cash and cash equivalents at beginning of period 3,166 15,354 12,194 — 30,714 Cash and cash equivalents at end of period $ 45 $ 9,215 $ 16,415 $ — $ 25,675 Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2014 (Amounts in thousands) Issuer Guarantors Non-Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (15,456) $ (5,724) $ 8,969 $ (3,245) $ (15,456 ) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 32,250 3,156 — 35,406 Deferred income tax benefit — (17,068) 712 — (16,356 ) Accretion on debt 3,766 — — — 3,766 Accretion on ESOI liabilities — 431 — — 431 Amortization of deferred finance costs 2,389 314 140 (84) 2,759 Loss on asset dispositions — 915 — — 915 Losses on write down of inventory supplies — 456 — — 456 (Gains) losses on derivative financial instruments — (1,085) 31 — (1,054 ) Lower of cost or market adjustment to inventories — 3,561 — — 3,561 Stock compensation expense 372 4,396 — — 4,768 Capitalization of interest (14,248) (647) — — (14,895 ) Equity in(income) loss of subsidiaries, net of taxes (3,331) — — 3,331 — Changes in operating assets and liabilities: Decrease (increase) in accounts receivable, net — 5,542 (6,825) (275) (1,558 ) Decrease in inventories, net — 7,448 3,103 — 10,551 Decrease (increase) in prepaid expenses and other current assets 7 1,358 (48) — 1,317 (Increase) decrease in other assets — (2,543) (108) 2,017 (634 ) (Decrease) increase in accounts payable — (46,102) (630) 275 (46,457 ) Increase (decrease) in accrued expenses 388 (5,439) (832) (2,019) (7,902 ) (Decrease) increase in other long-term liabilities — (325) 48 — (277 ) Net cash (used in) provided by operating activities (26,113) (22,262) 7,716 — (40,659 ) Cash Flows from Investing Activities: Purchase of property, plant and equipment — (102,351) (8,474) — (110,825 ) Investment in and advances (to) from subsidiaries (122,043) 126,401 (4,358) — — Net cash used in investing activities. (122,043) 24,050 (12,832) — (110,825 ) Cash Flows from Financing Activities: Proceeds from the issuance of debt 51,300 — — — 51,300 Distributions to noncontrolling interest equity holders — — (113) — (113 ) Borrowings on the Credit Facilities — 23,750 9,574 — 33,324 Repayments on the Credit Facilities — (35,420) (174) — (35,594 ) Debt Issuance Costs (1,652) (172) (73) — (1,897 ) Borrowings on the Credit Agreement — 1,555 — — 1,555 Repayments on the Credit Agreement — (2,929) — — (2,929 ) Proceeds from the exercise of stock options 941 — — — 941 Tax effect of share based compensation award exercise and vesting (33) — — — (33 ) Restricted stock withheld for taxes (683) — — — (683 ) Net cash provided by (used in) financing activities 49,873 (13,216) 9,214 — 45,871 Net (decrease) increase in cash and cash equivalents (98,283) (11,428) 4,098 — (105,613 ) Cash and cash equivalents at beginning of period 101,449 26,782 8,096 — 136,327 Cash and cash equivalents at end of period $ 3,166 $ 15,354 $ 12,194 $ — $ 30,714 Horsehead Holding Corp. and Subsidiaries Consolidated Statements of Cash Flows For the year ended December 31, 2013 (Amounts in thousands) Issuer Guarantors Non-Guarantors Eliminations Total Cash Flows from Operating Activities: Net (loss) income $ (13,959) $ (17,640) $ 4,637 $ 13,003 $ (13,959) Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Depreciation and amortization — 27,281 2,397 — 29,678 Gain on insurance recovery related to fixed assets — (1,791) — — (1,791) Deferred income tax benefit — (10,435) 573 — (9,862) Accretion on debt 3,727 — — — 3,727 Accretion on ESOI liabilities — 445 — — 445 Amortization of deferred finance costs 2,114 249 117 (86) 2,394 Impairment loss — 9,349 — — 9,349 Loss on asset dispositions — 701 — — 701 Losses on write down of inventory supplies — 2,738 — — 2,738 Losses on derivative financial instruments — 5,696 23 — 5,719 Lower of cost or market adjustment to inventories — 3,739 — — 3,739 Stock compensation expense 380 2,829 — — 3,209 Capitalization of interest (28,550) (888) — — (29,438) Equity in loss (income) of subsidiaries, net of taxes 12,917 — — (12,917) — Changes in operating assets and liabilities: Decrease (increase) in accounts receivable, net — 3,923 (2,934) 349 1,338 (Increase) in inventories, net — (7,521) (6,865) — (14,386) Decrease (increase) in prepaid expenses and other current assets 21 3,800 3 (425) 3,399 (Increase) decrease in other assets — (125) 28 — (97) (Decrease) increase in accounts payable (93) 26,530 4,164 (349) 30,252 Increase in accrued expenses 112 9,434 2,696 425 12,667 Increase in other long-term liabilities — 2,173 — — 2,173 Net cash (used in) provided by operating activities (23,331) 60,487 4,839 — 41,995 Cash Flows from Investing Activities: Purchase of property, plant and equipment — (300,739) (11,059) — (311,798) Insurance proceeds related to fixed assets — 1,791 — — 1,791 Investment in and advances (to) from subsidiaries (191,243) 191,415 (172) — — Net cash used in investing activities. (191,243) (107,533) (11,231) — (310,007) Cash Flows from Financing Activities: Proceeds from the issuance of debt 21,300 — — — 21,300 Distributions to noncontrolling interest equity holders — — (114) — (114) Borrowings on the Credit Facilities — 51,000 23,500 — 74,500 Repayments on the Credit Facilities — (4,500) (13,500) — (18,000) Debt Issuance Costs (358) (141) (25) — (524) Borrowings on the Credit Agreement — 13,358 — — 13,358 Repayments on the Credit Agreement — (1,866) — — (1,866) Tax effect of share based compensation award exercise and vesting (19) — — — (19) Restricted stock withheld for taxes (411) — — — (411) Net proceeds from the issuance of stock 71,996 — — — 71,996 Net cash provided by financing activities 92,508 57,851 9,861 — 160,220 Net (decrease) increase in cash and cash equivalents (122,066) 10,805 3,469 — (107,792) Cash and cash equivalents at beginning of period 223,515 15,977 4,627 — 244,119 Cash and cash equivalents at end of period $ 101,449 $ 26,782 $ 8,096 $ — $ 136,327

Organization and Basis of Pre62

Organization and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Losses on asset dispositions	$ (11,029)	$ 915	$ 701
Impairment losses	$ 527,621		$ 9,349

Summary of Significant Accoun63

Summary of Significant Accounting Policies - Components of Net Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Net sales	$ 414,943	$ 453,937	$ 441,936
Zinc and Nickel Material Goods [Member]
Revenue from External Customer [Line Items]
Net sales	336,484	372,661	363,075
Service Fee Revenue [Member]
Revenue from External Customer [Line Items]
Net sales	67,029	73,494	73,423
Other [Member]
Revenue from External Customer [Line Items]
Net sales	$ 11,430	$ 7,782	$ 5,438

Summary of Significant Accoun64

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)LocationCustomerBroker	Dec. 31, 2014USD ($)Customer	Dec. 31, 2013USD ($)Customer
Revenue, Major Customer [Line Items]
Maturities of highly liquid investments	90 days or less
(Benefit) Provision for bad debt expense	$ 184,000	$ (122,000)	$ (19,000)
Number of company locations | Location	3
Amount recognized in financial statements	Greater than 50 percent
Number of different brokers | Broker	4
Goodwill	$ 0
Indefinite life intangible assets	0
Cash paid for net interest	32,420,000	28,743,000	24,721,000
Cash paid for interest, capitalized	2,989,000	13,942,000	23,809,000
Cash paid for income taxes	2,760,000	$ 1,041,000	$ 2,584,000
Reclassified amount of supplies inventory to property, plant and equipment	3,085,000
Investments in and advance to affiliates, subsidiaries, associates, and joint ventures	2,000,000
Real estate investments, unconsolidated real estate and other joint ventures	$ 340,000
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer			0
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer	0
One Major Customer [Member] | Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer	1	1
Concentration risk, percentage	10.00%	11.00%
One Major Customer [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer		1
Concentration risk, percentage		17.00%
Ten Largest Customers [Member] | Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer	10
Concentration risk, percentage	43.00%	44.00%	34.00%
Ten Largest Customers [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of major customers | Customer	10	10
Concentration risk, percentage	46.00%	46.00%
Maximum [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Revenue, Major Customer [Line Items]
Equity method investment percentage	50.00%
Maximum [Member] | Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			10.00%
Minimum [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	10.00%

Summary of Significant Accoun65

Summary of Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2015
Minimum [Member] | Buildings, Land and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum [Member] | Buildings, Land and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	30 years

Equity Offerings - Additional I

Equity Offerings - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	Jan. 28, 2015	Oct. 30, 2013	Dec. 02, 2015	Dec. 31, 2015	Dec. 31, 2013	Oct. 23, 2015
Stockholders Equity [Line Items]
Shares issued in public offering	5,750	6,325
Shares issued in public offering, underwriter option	750	825
Share issue price	$ 12.75	$ 12
Net proceeds from equity offering	$ 73,313,000	$ 75,900,000		$ 78,029,000	$ 71,996,000
Shares issued in public offering, underwriting discounts and commissions	3,299,000	3,416,000
Stock issuance cost, offering cost	392,000	488,000
Net proceeds from the issuance of stock	$ 69,622,000	$ 71,996,000		$ 78,029,000	$ 71,996,000
ATM Offering [Member]
Stockholders Equity [Line Items]
Shares issued in public offering			3,507
Net proceeds from the issuance of stock			$ 8,407,000
ATM maximum equity issuance						$ 50,000,000
Common stock average price per share			$ 2.60
Shares issued in public offering, value			$ 9,109,000
Underwriting discounts and commissions			300,000
Expenses related to offering			$ 402,000
ATM program suspension date			Dec. 2, 2015

Restructuring Expenses - Additi

Restructuring Expenses - Additional Information (Detail) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2014Position	Dec. 31, 2013USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring expenses			$ 288	$ 7,691
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of salary and hourly positions eliminated | Position	510
Restructuring expenses		$ 7,691	$ 288

Restructuring Expenses - Schedu

Restructuring Expenses - Schedule of Restructuring Accrual (Detail) - Facility Closing [Member] - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Accrual at beginning of period	$ 7,517	$ 461	$ 7,682
Adjustments to previously recorded restructuring charges	174		288
Cash payments	(9)	$ (461)	(7,509)
Accrual at end of period	$ 7,682		$ 461

New Markets Tax Credit Progra69

New Markets Tax Credit Program Financing - Additional Information (Detail) $ in Thousands	May 31, 2016USD ($)	Dec. 31, 2015USD ($)Guaranteed_Payment	Dec. 31, 2009USD ($)	Dec. 31, 2014USD ($)	Jun. 08, 2009USD ($)
Schedule of Equity Method Investments [Line Items]
Percentage of guaranteed payment on equity securities		2.00%
Equity investment maturity period		7 years
Purchase options		$ 360		$ 360
Equity issuance costs			$ 838
Net proceeds of non-controlling interest			$ 4,472
Number of guaranteed payments | Guaranteed_Payment		6
Noncontrolling interest		$ 3,839		3,952
Long-term debt, less current maturities				$ 406,016
Scenario, Forecast [Member]
Schedule of Equity Method Investments [Line Items]
Additional interest and fees	$ 140
NMTC [Member]
Schedule of Equity Method Investments [Line Items]
NMTC funds for expansion					$ 5,925
Investment purchase period NMTC fund		7 years
Long-term debt, less current maturities		$ 255
Banc of America CDE III, LLC and CCM Community Development IV LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity investment		$ 5,670

Asset Write Downs and Disposals

Asset Write Downs and Disposals - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 07, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Write-down resulted in a reduction in cost			$ 41,644
Accumulated depreciation			32,295
Gain (loss) on disposition of property plant equipment				$ (1,122)	$ (915)	$ (701)
Cost of assets disposed				3,115	1,751	3,550
Accumulated depreciation of assets disposed				1,993	$ 836	2,849
Mooresboro Facility [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges		$ 527,621		527,621
Write-down resulted in a reduction in cost				574,060
Accumulated depreciation				46,439
Net book value of asset		87,643		87,643
Monaca Pennsylvania facility [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges			9,349
Net book value of asset			$ 5,000			$ 5,000	$ 1,210
Gain (loss) on disposition of property plant equipment	$ 12,152
Deferred gain recognized		$ 4,500		$ 4,500

Asset Write-Downs and Disposa71

Asset Write-Downs and Disposals - Schedule of Net Book Value of Mooresboro Facility After Impairment (Detail) - Mooresboro Facility [Member] $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
December 31, 2015 net book value of the Mooresboro facility prior to impairment charge	$ 614,117	$ 614,117
Impairment charge	(527,621)	(527,621)
Supplies inventory included in construction in progress	1,147	1,147
Net book value of asset	$ 87,643	$ 87,643

Cash and Cash Equivalents - Sch

Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents, at Carrying Value [Abstract]
Cash in bank	$ 25,675	$ 30,497
Money market demand account		217
Total cash and cash equivalents	$ 25,675	$ 30,714	$ 136,327	$ 244,119

Cash and Cash Equivalents - Add

Cash and Cash Equivalents - Additional Information (Detail) $ in Thousands	Dec. 31, 2015USD ($)Bank	Dec. 31, 2014Bank
Cash and Cash Equivalents [Abstract]
Number of U.S. banks	2	3
Number of Canadian banks	1	1
Cash held at foreign institution | $	$ 856
Money market demand account interest rate (percent)		0.15%

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 12,230	$ 17,493
Work-in-process	2,776	2,847
Finished goods	19,545	21,885
Supplies and spare parts	10,458	18,345
Inventory Gross	45,009	60,570
Excess and obsolete inventory reserves	(4,518)	(5,562)
Total Inventories	$ 40,491	$ 55,008

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Provision for slow moving inventory				$ 4,070	$ (34)	$ 3,807
Lower of cost or market adjustment to inventories	$ 3,054	$ 456	$ 2,738	$ 4,389	$ 3,561	$ 3,739

Prepaid Expenses and Other Cu76

Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred finance costs	$ 4,705
Other	5,410	$ 3,755
Prepaid expenses and other current assets	$ 10,115	$ 3,755

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 24,437	$ 50,117
Buildings and building improvements	41,083	96,904
Machinery and equipment	299,009	736,815
Construction in progress	8,847	33,556
Property, plant and equipment, gross	373,376	917,392
Less accumulated depreciation	(118,535)	(118,299)
Property, plant and equipment, net	$ 254,841	$ 799,093

Property, Plant and Equipment78

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Depreciation and Amortization Expenses for Property Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment		$ 54,082	$ 34,326	$ 28,176
Mooresboro Facility [Member]
Depreciation and Amortization Expenses for Property Plant and Equipment [Line Items]
Interest costs capitalized		2,989	$ 14,895	$ 29,438
Net capitalized interest expense		58,383
Impairment charges	$ 527,621	$ 527,621

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 14,434	$ 15,514
Less accumulated amortization	(4,983)	(5,322)
Intangible assets, net	9,451	10,192
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	10,915	10,915
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,518	2,068
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	789	789
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	812	812
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 400	$ 930

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 742	$ 1,080	$ 1,502
Amortize amount for 2016	740
Amortize amount for 2017	740
Amortize amount for 2018	740
Amortize amount for 2019	740
Amortize amount for 2020	$ 740
Customer Contracts [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	20 years
Customer Contracts [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	15 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	20 years
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	15 years
Trademarks [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	20 years
Trademarks [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	3 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	17 years
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	10 years

Restricted Cash - Additional In

Restricted Cash - Additional Information (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Cash and Cash Equivalents [Abstract]
Restricted cash	$ 7,939

Deferred Finance Costs and Ot82

Deferred Finance Costs and Other - Schedule of Deferred Finance Cost and Other (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred finance costs		$ 8,042
Other	$ 1,496	1,220
Deferred finance costs and other	$ 1,496	$ 9,262

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Detail) CAD in Thousands	Dec. 31, 2015USD ($)	Dec. 31, 2015CAD	Dec. 31, 2014USD ($)	Jul. 29, 2014USD ($)	Jul. 26, 2012USD ($)	Jul. 27, 2011USD ($)
Debt Instrument [Line Items]
Loan Payable, related to New Market Tax Credit program	$ 255,000		$ 255,000
Long-term debt	433,079,000		409,060,000
Long-term debt	433,079,000		409,060,000
Less portion currently payable	433,079,000		3,044,000
Long-term debt, less current maturities			406,016,000
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
3.80% Convertible Senior Notes due July 2017, net of debt discount	93,403,000		89,448,000
9.00% Senior Unsecured Notes due July 2017						$ 100,000,000
10.50% Senior Secured Notes due June 2017 [Member]
Debt Instrument [Line Items]
10.50% Senior Secured Notes due June 2017, including the debt premium	205,081,000		205,169,000
9.00% Senior Unsecured Notes due July 2017					$ 175,000,000
Long-term debt	205,000,000
Long-term debt	205,000,000
9.00% Senior Unsecured Notes due 2017 [Member]
Debt Instrument [Line Items]
9.00% Senior Unsecured Notes due July 2017	40,000,000		40,000,000	$ 40,000,000
ABL Facility [Member]
Debt Instrument [Line Items]
Long-term line of credit			14,830,000
Zochem Credit Facility [Member]
Debt Instrument [Line Items]
Long-term line of credit	17,500,000	CAD 17,500	19,400,000
INMETCO Credit Facility [Member]
Debt Instrument [Line Items]
Long-term line of credit			20,000,000
Macquarie Credit Facility [Member]
Debt Instrument [Line Items]
Long-term line of credit	59,451,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term line of credit	$ 17,389,000		$ 19,958,000

Long-Term Debt - Schedule of 84

Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jul. 29, 2014	Jul. 26, 2012	Jul. 27, 2011
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Maturity date of convertible note	Jul. 1, 2017
Debt interest rate	3.80%	3.80%			3.80%
10.50% Senior Secured Notes due June 2017 [Member]
Debt Instrument [Line Items]
Maturity of senior secured notes	Jun. 1, 2017
Debt interest rate	10.50%	10.50%		10.50%
9.00% Senior Unsecured Notes due 2017 [Member]
Debt Instrument [Line Items]
Maturity of senior secured notes	Jul. 1, 2017
Debt interest rate	9.00%	9.00%	9.00%

Long-Term Debt - Convertible Se

Long-Term Debt - Convertible Senior Notes - Additional Information (Detail)	Jul. 27, 2011USD ($)$ / shares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Debt Instrument [Line Items]
Amortization of deferred finance costs		$ 4,976,000	$ 2,759,000	$ 2,394,000
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible notes issued	$ 100,000,000
Debt interest rate	3.80%	3.80%	3.80%
Proceeds from the issuance of convertible notes	$ 100,000,000
Issuance cost	$ 3,481,000
Conversion rate		0.0666667
Principal amount of convertible notes | shares		6,666,670
Conversion price | $ / shares	$ 15	$ 15
Percentage of principal amount of convertible notes to repurchase	100.00%
Fair value of the liability component of the convertible notes	$ 78,174,000
Nonconvertible rate	8.50%
Carrying amount of the embedded conversion option	$ 21,826,000
Embedded conversion options, deferred taxes	8,805,000
Deferred finance costs	2,721,000
Remaining issuance costs accounted for as equity issuance	$ 760,000
Amortization of deferred finance costs		$ 460,000	$ 460,000	460,000
Interest expense includes the contractual interest coupon		7,755,000	7,433,000	$ 7,139,000
Effective interest rate	8.50%
Interest expense includes the contractual interest coupon	3.80%
Carrying amount of the convertible notes		93,403,000	89,448,000
Unamortized discount (premium)		6,597,000	10,552,000
Carrying amount of the equity component		3,564,000	6,052,000
Accumulated accretion related to the equity component		9,457,000	6,969,000
Fair value of the convertible notes		$ 26,000,000	$ 122,000,000

Long-Term Debt - ABL Facility -

Long-Term Debt - ABL Facility - Additional Information (Detail) - USD ($)	Jul. 06, 2015	Jun. 24, 2013	Sep. 28, 2011	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Debt Instrument [Line Items]
Amortization of deferred finance costs					$ 4,976,000	$ 2,759,000	$ 2,394,000
ABL Facility [Member]
Debt Instrument [Line Items]
Debt term					5 years
Senior secured revolving credit facility aggregate principal amount					$ 60,000,000
Maximum principal amount of revolving credit agreement					30,000,000
Issuance cost			$ 600,000
Write off of deferred debt issuance cost				$ 201,000
Amortization of deferred finance costs				$ 201,000	281,000	122,000	90,000
Macquarie Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount	$ 80,000,000
Issuance cost	$ 1,635,000
INMETCO Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount		$ 15,000,000			20,000,000			$ 20,000,000
Issuance cost		$ 151,000
Amortization of deferred finance costs					$ 79,000	$ 51,000	$ 21,000

Long-Term Debt - Senior Secured

Long-Term Debt - Senior Secured Notes - Additional Information (Detail) - USD ($)	Jul. 29, 2014	Jul. 26, 2012	Dec. 31, 2015	Dec. 31, 2014	Jun. 03, 2014	Dec. 31, 2013	Jun. 03, 2013
Debt Instrument [Line Items]
Long-term debt			$ 433,079,000	$ 409,060,000
Amortization of deferred finance costs			$ 4,976,000	$ 2,759,000		$ 2,394,000
2013 Additional Notes [Member]
Debt Instrument [Line Items]
Face amount of debt							$ 20,000,000
Additional senior secured notes issue price of par value							106.50%
Received proceeds from the offering					$ 21,300,000
Issuance cost					345,000
Proceeds from the issuance of debt					$ 20,955,000
Effective interest rate			8.60%
Debt premium							$ 1,300,000
Interest expense includes the contractual interest coupon					10.50%
2014 Additional Notes
Debt Instrument [Line Items]
Face amount of debt	$ 10,000,000
Debt interest rate	10.50%
Additional senior secured notes issue price of par value	113.00%
Received proceeds from the offering	$ 11,300,000
Issuance cost	338,000
Proceeds from the issuance of debt	10,962,000
Effective interest rate			5.50%
Debt premium	$ 1,300,000
Interest expense includes the contractual interest coupon	10.50%
10.50% Senior Secured Notes due June 2017 [Member]
Debt Instrument [Line Items]
Face amount of debt		$ 175,000,000
Debt interest rate		10.50%	10.50%	10.50%
Additional senior secured notes issue price of par value		98.188%
Received proceeds from the offering		$ 171,829,000
Issuance cost		7,732,000	$ 8,415,000
Proceeds from the issuance of debt		164,097,000
Debt discount of senior secured notes		$ 3,171,000
Effective interest rate			11.00%
Interest expense			$ 21,283,000	$ 21,053,000		19,986,000
Debt instrument redemption price first (percent)		105.25%
Long-term debt			205,000,000
Carrying amount of the senior secured notes			205,081,000	205,169,000
Unamortized discount (premium)			(81,000)	(169,000)
Fair value of the senior secured notes			138,000,000	224,000,000
Amortization of deferred finance costs			$ 1,805,000	$ 1,736,000		$ 1,652,000

Long-Term Debt - Credit Agreeme

Long-Term Debt - Credit Agreement - Additional Information (Detail) € in Thousands, $ in Thousands	Aug. 28, 2012USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Aug. 28, 2012EUR (€)	Aug. 28, 2012USD ($)
Debt Instrument [Line Items]
Amortization of deferred finance costs		$ 4,976	$ 2,759	$ 2,394
Credit Agreement [Member]
Debt Instrument [Line Items]
Credit agreement remaining borrowing capacity					€ 18,583	$ 25,805
Payment for the premium of the insurance	$ 968
Basis spread on variable rate		3.20%
Commitment fee on the undrawn amount of the credit agreement		0.50%
Outstanding borrowings under the revolving credit agreement		$ 17,389	19,958
Credit agreement expiration date		Feb. 29, 2024
Maximum debt to equity ratio		121.00%
Issuance cost	$ 1,248
Amortization of deferred finance costs		$ 141	$ 141	$ 141

Long-Term Debt - Zochem Revolvi

Long-Term Debt - Zochem Revolving Credit and Security Agreement - Additional Information (Detail)	Apr. 29, 2014USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2015CAD	Apr. 29, 2014CAD	Dec. 21, 2012CAD
Debt Instrument [Line Items]
Amortization of deferred finance costs		$ 4,976,000	$ 2,759,000	$ 2,394,000
Zochem Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount	$ 20,000,000	20,000,000				CAD 20,000,000	CAD 15,000,000
Senior secured revolving credit facility period	29 months
Maximum principal amount of revolving credit agreement | CAD					CAD 5,000,000
Outstanding borrowings under the revolving credit agreement		17,500,000	19,400,000		CAD 17,500,000
Remaining borrowing capacity		$ 0
Applicable margin based on average undrawn availability	1.00%
Applicable margin plus Eurodollar rate	2.50%					2.50%
Applicable margin based on average undrawn availability, condition two	2.50%					2.50%
Fronting fee to the issuing bank	0.25%
Unused line fee to the lenders	75.00%
Minimum percentage of advances considered for customary event of default		66.67%			66.67%
Applicable rate plus additional		2.00%			2.00%
Increased in letter of credit fee		2.00%
Minimum fixed charge coverage ratio		0.0115%			0.0115%
Issuance cost	$ 201,000
Amortization of deferred finance costs		$ 116,000	$ 55,000	$ 30,000

Long-Term Debt - INMETCO Senior

Long-Term Debt - INMETCO Senior Secured Revolving Credit Agreement - Additional Information (Detail) - USD ($)	Jul. 06, 2015	Jun. 24, 2013	Sep. 28, 2011	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Debt Instrument [Line Items]
Amortization of deferred finance costs					$ 4,976,000	$ 2,759,000	$ 2,394,000
INMETCO Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount		$ 15,000,000			20,000,000			$ 20,000,000
Issuance cost		$ 151,000
Amortization of deferred finance costs					79,000	51,000	21,000
Macquarie Credit Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount	$ 80,000,000
Issuance cost	$ 1,635,000
ABL Facility [Member]
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount					60,000,000
Issuance cost			$ 600,000
Amortization of deferred finance costs				$ 201,000	$ 281,000	$ 122,000	$ 90,000

Long-Term Debt - Senior Unsecur

Long-Term Debt - Senior Unsecured Notes - Additional Information (Detail) - USD ($)	Jul. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Amortization of deferred finance costs		$ 4,976,000	$ 2,759,000	$ 2,394,000
9.00% Senior Unsecured Notes due 2017 [Member]
Debt Instrument [Line Items]
Face amount of debt	$ 40,000,000	$ 40,000,000	$ 40,000,000
Debt interest rate	9.00%	9.00%	9.00%
Senior unsecured notes issue price as percentage of par	100.00%
Proceeds from the issuance of debt	$ 38,686,000
Issuance cost	$ 1,314,000
Interest expense		$ 3,600,000	$ 1,520,000
Debt instrument redemption price first		104.50%
Amortization of deferred finance costs		$ 464,000	193,000
Fair value of the senior secured notes		$ 23,700,000	$ 40,000,000

Long-Term Debt - Macquarie Revo

Long-Term Debt - Macquarie Revolving Credit Facility - Additional Information (Detail) - Macquarie Credit Facility [Member] - USD ($)	Jul. 06, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Senior secured revolving credit facility aggregate principal amount	$ 80,000,000
Outstanding borrowings under the revolving credit agreement		$ 59,451,000
Basis spread on variable rate	4.10%
Unused line fee to the lenders	1.50%
Issuance cost	$ 1,635,000

Long-Term Debt - Other - Additi

Long-Term Debt - Other - Additional Information (Detail) $ in Thousands	Dec. 31, 2015USD ($)Surety_BondFacility	Dec. 31, 2014USD ($)Surety_BondFacility
Debt Instrument [Line Items]
Letters of credit outstanding under the revolving credit agreement	$ 7,939
Number of surety bonds outstanding | Surety_Bond	3	3
Value of surety bond outstanding	$ 11,213	$ 11,213
Pennsylvania [Member]
Debt Instrument [Line Items]
Number of surety bonds outstanding | Facility	3	3
Zochem Credit Facility [Member]
Debt Instrument [Line Items]
Letters of credit outstanding under the revolving credit agreement	$ 364
ABL Facility and Zochem Facility [Member]
Debt Instrument [Line Items]
Letters of credit outstanding under the revolving credit agreement		$ 7,926

Accrued Expenses - Schedule of

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Employee related costs	$ 5,868	$ 5,717
EAF dust processing reserve	3,336	3,684
Workers' compensation insurance claim liabilities	1,500	1,500
Unearned tolling revenue	1,305	2,434
Accrued sales tax	2,291	950
Accrued interest	4,534	4,473
Accrued hedge contracts	1,275	375
Accrued insurance	1,749	1,767
Unearned contractual services		3,976
Other	2,972	10,769
Total accrued expenses	$ 24,830	$ 35,645

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income before Income Tax, Domestic and Foreign (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
United States	$ (670,686)	$ (41,984)	$ (29,355)
Canada	5,639	13,554	7,941
(Loss) income before income taxes	$ (665,047)	$ (28,430)	$ (21,414)

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current provision (benefit)
Federal	$ 325
State and local	(45)	$ 1,072	$ 1,154
Foreign	227	2,294	1,271
Current provision (benefit)	507	3,366	2,425
Deferred (benefit) provision:
Federal	(5,955)	(12,681)	(10,888)
State and local	4,575	(4,385)	457
Foreign	1,214	726	551
Deferred Income Tax Expense (Benefit), Including Reclassifications	(166)	(16,340)	(9,880)
Income tax provision (benefit)	$ 341	$ (12,974)	$ (7,455)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2015
Income Taxes And Tax Related [Line Items]
Statutory federal income tax rate	35.00%
Effective tax rates	(0.10%)	45.60%	34.80%
Due to foreign subsidiary	$ 6,500,000
Maximum amount of tax credit allowed				50.00%
Tax credit carryforward				$ 500,000,000
U.S. Federal Net Operating Loss Carryforwards	349,000,000	$ 144,000,000
Unrecognized tax benefits	0	0
Income tax examination, penalties and interest expense	0	0	$ 0
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost [Member]
Income Taxes And Tax Related [Line Items]
U.S. Federal Net Operating Loss Carryforwards	$ 5,100,000	$ 4,200,000

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes at statutory rate	$ (232,766)	$ (9,950)	$ (7,495)
State and local income taxes, net of federal tax effect	(11,693)	(2,093)	1,047
State tax credit	(185,974)
Valuation allowance	419,386
Executive compensation		364	230
Research and development credit		(80)	(139)
Undistributed foreign earnings	10,942
Section 956 deemed dividend	569
Withholding tax	325
Foreign rate differential	(565)	(1,256)	(794)
Other	117	41	(304)
Income tax provision (benefit)	$ 341	$ (12,974)	$ (7,455)

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Accrued fringe benefits	$ 412	$ 104
Prepaid hedge contracts	507	90
Stock compensation	5,668	4,628
State tax credits	188,171	2,197
State net operating loss carry forward	10,152	7,534
Federal net operating loss carry forward	120,215	49,003
Inventory	8,363	1,205
Accrued workers compensation		901
Partnership allocations	552	70
Property, plant and equipment	96,473
Other	5,772	7,563
Gross deferred tax asset	436,285	73,295
Valuation reserve	(422,091)	(2,706)
Net deferred tax asset	14,194	70,589
Deferred tax liabilities:
Property, plant and equipment		(67,452)
Deferred financing costs	(2,425)	(4,090)
Undistributed foreign earnings	(12,488)
Intangible assets	(645)	(704)
Other	(1,749)	(1,694)
Total deferred tax liabilities	(17,307)	(73,940)
Net deferred tax liability	$ (3,113)	$ (3,351)

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets Net Classification (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Net, Classification [Abstract]
Current deferred tax asset		$ 5,251
Current deferred tax liability	$ 0	0
Net current deferred tax asset		5,251
Non-current deferred tax asset	0	0
Non-current deferred tax liability	(3,113)	(8,602)
Net non-current deferred tax liability	(3,113)	(8,602)
Net deferred tax liability	$ (3,113)	$ (3,351)

Income Taxes - Summary of Net O

Income Taxes - Summary of Net Operating Loss and Tax Credit Carryforwards (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Oct. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
U.S. Federal Net Operating Loss Carryforwards	$ 349,000		$ 144,000
U.S. State Credit Carryforwards		$ 500,000
2010 - 2015 [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,030
2010 - 2015 [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,035
2004 - 2015 [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,016
2004 - 2015 [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,035
2007 - 2015 [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,017
2007 - 2015 [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Expiration	2,039
Federal [Member]
Operating Loss Carryforwards [Line Items]
U.S. Federal Net Operating Loss Carryforwards	$ 343,473
Federal [Member] | 2010 - 2015 [Member]
Operating Loss Carryforwards [Line Items]
U.S. Federal Net Operating Loss Carryforwards	343,473
State [Member]
Operating Loss Carryforwards [Line Items]
U.S. Federal Net Operating Loss Carryforwards	243,418
U.S. State Credit Carryforwards	188,171
State [Member] | 2004 - 2015 [Member]
Operating Loss Carryforwards [Line Items]
U.S. Federal Net Operating Loss Carryforwards	243,418
State [Member] | 2007 - 2015 [Member]
Operating Loss Carryforwards [Line Items]
U.S. State Credit Carryforwards	$ 188,171

Other Long-Term Liabilities - S

Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Environmental obligations	$ 567	$ 620
Insurance claim liabilities	5,603	7,753
Asset retirement obligations	5,123	4,775
Deferred purchase price obligation	3,538	3,769
Other	674	1,374
Total other long term liabilities	$ 15,505	$ 18,291

Other Long-Term Liabilities - A

Other Long-Term Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Long Term Liabilities [Line Items]
Discounted net present value of these costs using an undiscounted obligation		$ 1,123	$ 1,262
Environmental obligations related to Bartlesville, current liability		$ 42
Discount rate		6.00%	6.00%
Workers' compensation insurance claim liabilities		$ 1,500	$ 1,500
Depreciation expense associated with the capitalized costs		134	134	$ 134
Expense associated with accreting liability		$ 348	$ 323	$ 300
Fixed discounted rate		8.40%
Variable discounted rate		12.00%
Payments for upfront fee	$ 1,500
Rate at which the renegotiated variable payments were discounted	13.30%
Net present value of the payments		$ 4,188
Net present value of the payments, which is recorded as a current liability		650
Ellwood City Facility [Member]
Other Long Term Liabilities [Line Items]
Long lived asset cost		$ 744
Long lived asset amortized and accreted period		20 years
Monaca Facility [Member]
Other Long Term Liabilities [Line Items]
Long lived asset cost		$ 632
Long lived asset amortized and accreted period		18 years
Additional long lived asset		$ 815
Long lived asset amortized and accreted period		10 years
Palmerton Facility [Member]
Other Long Term Liabilities [Line Items]
Long lived asset cost		$ 206
Long lived asset amortized and accreted period		25 years
Oklahoma [Member]
Other Long Term Liabilities [Line Items]
Environmental obligations related to Bartlesville		$ 609

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)PlanEmployee	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of defined contribution plan | Plan	2
Employee's deferral contribution	4.00%
Number of days for eligibility of hourly employees	90 days
Service period required for employers contribution	1 year
Employers contribution in percentage	3.00%
Employer matching contribution	50.00%
Percentage of employee's deferral contribution based on compensation	4.00%
Expense related to the plan	$ 37	$ 44	$ 201
Defined benefit plan, future amortization of gain (loss)	23
Accumulated benefit obligation for benefit pension plans	3,731
Expected contributions	$ 169
Discount rate	4.00%	4.00%
Salaried Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Provisions for all contributions	$ 935	$ 1,058	1,081
Hourly Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Provisions for all contributions	$ 369	$ 911	$ 1,546
Employee Turnover Rate, Minimum for Partial Plan Termination, Percent	20.00%
Partial Plan Termination, Accrued Benefits Vested, Percent	100.00%
Active Employee [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees covered under the plan | Employee	30
Retired Employee [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees covered under the plan | Employee	32

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Net Periodic Benefit Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of net periodic benefit cost:
Service Cost	$ 113	$ 135	$ 256
Interest Cost	158	188	202
Expected return on plan assets	(218)	(260)	(257)
Amortization of gains	(16)	(19)
Net periodic benefit cost	$ 37	$ 44	$ 201

Employee Benefit Plans - Sch106

Employee Benefit Plans - Schedule of Changes in Funded Status of Pension Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in benefit obligation:
Benefit obligation at beginning of period	$ 4,576	$ 4,439
Service Cost	113	135	$ 256
Interest Cost	158	188	202
Actuarial (gains) losses	(5)	550
Currency translation	(740)	(370)
Benefits paid	(388)	(366)
Benefit obligation at end of year	3,731	4,576	4,439
Change in plan assets:
Plan assets at beginning of period	4,949	4,839
Expected return on plan assets	218	260	257
Employer contribution	145	159
Actuarial gains (losses)	(228)	461
Currency translation	(801)	(404)
Benefits paid	(388)	(366)
Plan assets at the end of year	3,919	4,949	$ 4,839
Funded status of Plan	188	373
Amounts recognized in the balance sheet consist of:
Noncurrent assets	$ 188	$ 373

Employee Benefit Plans - Expect

Employee Benefit Plans - Expected Benefit Payments for Pension Benefits (Detail) - Pension Plan [Member] $ in Thousands	Dec. 31, 2015USD ($)
Expected benefit payments for pension benefits
2,016	$ 149
2,017	149
2,018	152
2,019	163
2,020	166
2021 - 2022	$ 901

Employee Benefit Plans - Summar

Employee Benefit Plans - Summary of Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of weighted average assumptions
Discount rate	4.00%	4.00%
Expected return on plan assets	6.00%	6.00%
Hourly Plan [Member]
Summary of weighted average assumptions
Average salary increase rate	0.00%	0.00%
Salaried Plan [Member]
Summary of weighted average assumptions
Average salary increase rate	2.25%	2.50%

Employee Benefit Plans - Weight

Employee Benefit Plans - Weighted Average Asset Allocation for Company's Pension Plans (Detail)	Dec. 31, 2015	Dec. 31, 2014
Weighted average asset allocation for the Company's pension plans
Weighted average asset allocation	100.00%	100.00%
Equity Securities [Member]
Weighted average asset allocation for the Company's pension plans
Weighted average asset allocation	57.40%	63.90%
Debt Securities [Member]
Weighted average asset allocation for the Company's pension plans
Weighted average asset allocation	23.50%	20.80%
Cash and Other [Member]
Weighted average asset allocation for the Company's pension plans
Weighted average asset allocation	19.10%	15.30%

Employee Benefit Plans - Compan

Employee Benefit Plans - Company's Pension Plan Assets at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Company's pension plan assets at fair value
Pension plan assets	$ 3,919	$ 4,949	$ 4,839
Canadian Large Cap Securities [Member]
Company's pension plan assets at fair value
Pension plan assets	1,360	1,712
Equity Securities [Member]
Company's pension plan assets at fair value
Pension plan assets	890	1,450
Canadian Fixed Income [Member]
Company's pension plan assets at fair value
Pension plan assets	776	876
Cash [Member]
Company's pension plan assets at fair value
Pension plan assets	745	752
Other [Member]
Company's pension plan assets at fair value
Pension plan assets	$ 148	$ 159

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	Jan. 16, 2007	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 17, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the exercise of stock options		$ 33,000	$ 941,000
Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual term of outstanding restricted stock units		1 year
Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual term of outstanding restricted stock units		1 year 9 months
2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock unit granted	1,085
Stock option expiration period	10 years
Stock option vesting period	5 years
Stock option exercise		3	72
Proceeds from the exercise of stock options		$ 33,000	$ 941,000
Number of options vested and exercisable		580
Issuance of stock option exercise price		$ 13
Stock option remaining contractual life		1 year 15 days
Aggregate intrinsic value of options outstanding		$ 0
2006 Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period	5 years
Forfeiture rate	0.00%
Number of restricted stock vested		204	214	197
Restricted stock vested intrinsic value		$ 3,042,000	$ 3,553,000	$ 2,109,000
Share based compensation expenses		1,036,000	$ 1,405,000	$ 1,313,000
Unrecognized compensation expense		457,000
Compensation expense recognized, 2016		447,000
Compensation expense recognized, 2017		$ 10,000
Restricted stock units outstanding		218	422	636	921
2012 Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock unit granted		126	133	209
Forfeiture rate		0.00%	0.00%	0.00%
Number of restricted stock vested		23	36
Share based compensation expenses		$ 4,384,000	$ 3,363,000	$ 1,897,000
Unrecognized compensation expense		5,714,000
Compensation expense recognized, 2016		2,913,000
Compensation expense recognized, 2017		$ 1,791,000
Restricted stock units outstanding		611	579	376
Common stock, capital shares reserved for future issuance						2,700
Fair value at the date of grant for stock options		$ 15.74	$ 16.11	$ 10.54
Management based restricted stock		232	242	383
Risk free interest rate		1.07%	0.076%	0.037%
Expected dividends		$ 0	$ 0	$ 0
Compensation expense recognized, 2018		678,000
Compensation expense recognized, 2019		328,000
Compensation expense recognized, 2020		$ 4,000
2012 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period		1 year
Stock option remaining contractual life		1 year
2012 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vesting period		5 years
Stock option remaining contractual life		4 years 6 months
2012 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value at the date of grant for stock options		$ 21.92	$ 31.15	$ 20.62
Management based restricted stock		106	109	174

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of Option Activity (Detail) - 2006 Plan [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares options outstanding, Beginning balance	583	655	655
Number of shares options outstanding, Stock option exercised	3	72	0
Number of shares options outstanding, Ending balance	580	583	655
Beginning balance	$ 13	$ 13	$ 13
Exercised in period	13	13	0
Ending balance	$ 13	$ 13	$ 13

Share-Based Compensation - S113

Share-Based Compensation - Schedule of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, shares	422	636	921
Vested, shares	204	214	197
Forfeited, shares			88
Ending balance, shares	218	422	636
Beginning balance	$ 10.99	$ 10.32	$ 9.81
Vested	11.02	8.99	8.05
Forfeited			10.03
Ending balance	$ 10.96	$ 10.99	$ 10.32
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, shares	579	376
Granted, shares	232	242	383
Vested, shares	23	36
Forfeited, shares	177	3	7
Ending balance, shares	611	579	376
Beginning balance	$ 18.66	$ 15.10
Granted	18.56	23.04	$ 15.10
Vested	15.83	10.52
Forfeited	20.59	23.75	15.57
Ending balance	$ 18.15	$ 18.66	$ 15.10

Accounting for Derivative In114

Accounting for Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013USD ($)	Dec. 31, 2015USD ($)BrokerT$ / lb$ / Pounds	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2011USD ($)
Derivatives, Fair Value [Line Items]
Maximum period of deliver quantities of product (years)		1 year
Proceeds from (payments for) settlement of swap contracts		$ (5,626)	$ (415)	$ 998
Number of Broker | Broker		4
Amount of outstanding over the counter position					$ 366
Derivatives instruments proceed from selling of right related to future bankruptcy settlement	$ 820
Put Option [Member]
Derivatives, Fair Value [Line Items]
Settlement of swap contracts, cash received				1,364
Cash benefit from the sale of options				1,295
Fixed Price Swaps [Member]
Derivatives, Fair Value [Line Items]
Proceeds from (payments for) settlement of swap contracts		$ 19,075	$ 741	$ 1,094
Variable to fixed future swap contracts | T		4,500
Strike price | $ / Pounds		0.83
Swaps [Member]
Derivatives, Fair Value [Line Items]
Zinc fixed to variable future swap contracts | T		15,700
Minimum [Member]
Derivatives, Fair Value [Line Items]
Fixed portion of fixed to variable swap contracts | $ / lb		0.71
Maximum [Member]
Derivatives, Fair Value [Line Items]
Fixed portion of fixed to variable swap contracts | $ / lb		0.93

Accounting for Derivative In115

Accounting for Derivative Instruments and Hedging Activities - Schedule of Gains and Losses Resulting from Company's Hedging Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, (losses) gain on derivative, net	$ 13,063	$ 1,380	$ (2,777)
(Losses) gains included in net sales	14,296	1,380	(2,777)
Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, (losses) gain on derivative, net		(3)	(3,079)
Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, (losses) gain on derivative, net	14,296	$ 1,383	$ 302
(Losses) gains included in cost of sales	$ (1,233)

Accounting for Derivative In116

Accounting for Derivative Instruments and Hedging Activities - Schedule of Fair Value of Swap Contracts and Put Options (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Swaps included in Accrued expenses	$ 1,275	$ 375
Level 2 [Member] | Swaps [Member]
Derivatives, Fair Value [Line Items]
Swaps included in Accrued expenses	$ 1,275	$ 375

Loss Per Share - Schedule of In

Loss Per Share - Schedule of Information Used to Compute Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic loss per share:
Net loss	$ (665,388)	$ (15,456)	$ (13,959)
Weighted average shares outstanding - basic	56,632	50,682	45,160
Basic loss per share	$ (11.75)	$ (0.30)	$ (0.31)
Diluted loss per share:
Net loss	$ (665,388)	$ (15,456)	$ (13,959)
Weighted average shares outstanding - diluted	56,632	50,682	45,160
Diluted loss per share	$ (11.75)	$ (0.30)	$ (0.31)
Reconciliation of average shares outstanding - basic to average shares outstanding - diluted:
Weighted average shares outstanding - basic and diluted	56,632	50,682	45,160

Loss Per Share - Schedule of An

Loss Per Share - Schedule of Anti-dilutive Shares Excluded from Earnings Per Share Calculation (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Anti-Dilutive Shares Excluded From Earnings Per Share Calculation [Line Items]
Total	1,549	2,336	1,762
Options [Member]
Anti-Dilutive Shares Excluded From Earnings Per Share Calculation [Line Items]
Exercise Price	$ 13
Total	580	598	655
Convertible Notes [Member]
Anti-Dilutive Shares Excluded From Earnings Per Share Calculation [Line Items]
Exercise Price	$ 15
Total		713
Restricted Stock Units [Member]
Anti-Dilutive Shares Excluded From Earnings Per Share Calculation [Line Items]
Total	969	1,025	1,107

Loss Per Share - Additional Inf

Loss Per Share - Additional Information (Detail) - Convertible Senior Notes [Member] - USD ($)	Dec. 31, 2015	Jul. 27, 2011
Debt Instrument [Line Items]
Face amount of debt		$ 100,000,000
Conversion price of Convertible Notes	$ 15	$ 15

Commitments - Summary of Future

Commitments - Summary of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,016	$ 5,216
2,017	3,727
2,018	2,325
2,019	1,914
2,020	1,349
Thereafter	1,330
Total	$ 15,861

Commitments - Additional Inform

Commitments - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)T	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rent expense for all operating lease	$ 6,540	$ 5,480	$ 5,219
Agreements require the company to purchase | T	41,000
Purchase commitment is estimated	$ 69,403

Accumulated Other Comprehens122

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Cumulative translation adjustments	$ 30	$ 30
Net pension adjustment (net of income tax of $72 and $159 in 2015 and 2014, respectively)	217	504
Accumulated other comprehensive income	$ 247	$ 534

Accumulated Other Comprehens123

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Net pension adjustment, tax	$ 72	$ 159

Selected Quarterly Financial124

Selected Quarterly Financial Data (Unaudited) - Selected Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interim Reporting [Line Items]
Sales									$ 414,943	$ 453,937	$ 441,936
Cost of sales (excluding depreciation and amortization)									443,660	414,159	404,759
Depreciation and amortization									54,824	35,406	29,678
Net (loss) income									$ (665,388)	$ (15,456)	$ (13,959)
(Loss) income per common share:
Basic									$ (11.75)	$ (0.30)	$ (0.31)
Diluted									$ (11.75)	$ (0.30)	$ (0.31)
Quarterly Financial Data [Member]
Interim Reporting [Line Items]
Sales	$ 83,007	$ 106,994	$ 122,798	$ 102,144	$ 106,630	$ 110,978	$ 126,265	$ 110,064
Cost of sales (excluding depreciation and amortization)	97,055	120,449	120,312	105,844	94,915	103,834	115,410	100,000
Depreciation and amortization	13,646	14,188	15,149	11,841	11,910	10,528	8,115	4,853
Net (loss) income	$ (615,899)	$ (27,376)	$ (3,619)	$ (18,494)	$ (4,055)	$ (7,010)	$ (5,120)	$ 729
(Loss) income per common share:
Basic	$ (10.56)	$ (0.48)	$ (0.06)	$ (0.34)	$ (0.08)	$ (0.14)	$ (0.10)	$ 0.01
Diluted	$ (10.56)	$ (0.48)	$ (0.06)	$ (0.34)	$ (0.08)	$ (0.14)	$ (0.10)	$ 0.01

Selected Quarterly Financial125

Selected Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015
Mooresboro Facility [Member]
Interim Reporting [Line Items]
Impairment charge	$ 527,621	$ 527,621

Segment Information - Additiona

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015Segment
Segment Reporting [Abstract]
Number of segments	3

Segment Information - Schedule

Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Net sales	$ 414,943	$ 453,937	$ 441,936
Depreciation and amortization	54,824	35,406	29,678
Cost of sales (excluding depreciation and amortization)	443,660	414,159	404,759
Selling, general and administrative expenses	26,580	24,149	22,207
Interest expense	39,280	21,680	2,728
(Loss) income before income taxes	(665,047)	(28,430)	(21,414)
Property, plant and equipment	254,841	799,093
Capital expenditures	33,693	110,825
Total assets	392,052	973,517
Eliminations [Member]
Revenue from External Customer [Line Items]
Net sales	(5,965)	(1,447)	(1,958)
Cost of sales (excluding depreciation and amortization)	(5,965)	(1,447)	(1,958)
Selling, general and administrative expenses	1,343	1,540	1,433
Interest expense	31,350	17,227	(257)
(Loss) income before income taxes	(32,677)	(18,701)	(956)
Total assets	(3,289)	2,551
Horsehead [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	246,474	256,609	311,914
Depreciation and amortization	49,448	30,608	25,607
Cost of sales (excluding depreciation and amortization)	302,866	254,563	303,980
Selling, general and administrative expenses	20,466	17,557	15,839
Interest expense	6,639	3,308	2,429
(Loss) income before income taxes	(647,832)	(37,189)	(40,934)
Property, plant and equipment	198,696	741,128
Capital expenditures	29,491	101,044
Total assets	275,681	841,954
Zochem [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	127,055	144,685	78,342
Depreciation and amortization	2,359	1,696	937
Cost of sales (excluding depreciation and amortization)	116,194	126,846	67,342
Selling, general and administrative expenses	2,149	2,398	2,244
Interest expense	549	475	228
(Loss) income before income taxes	5,639	13,554	7,941
Property, plant and equipment	24,746	26,281
Capital expenditures	815	8,474
Total assets	70,005	69,706
INMETCO [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	47,379	54,090	53,638
Depreciation and amortization	3,017	3,102	3,134
Cost of sales (excluding depreciation and amortization)	30,565	34,197	35,395
Selling, general and administrative expenses	2,622	2,654	2,691
Interest expense	742	670	328
(Loss) income before income taxes	9,823	13,906	$ 12,535
Property, plant and equipment	31,399	31,684
Capital expenditures	3,387	1,307
Total assets	$ 49,655	$ 59,306

Insurance Recoveries - Addition

Insurance Recoveries - Additional Information (Detail) - INMETCO [Member] - USD ($)	Nov. 08, 2015	Oct. 28, 2012	Dec. 31, 2015	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2013
Segment Reporting Information [Line Items]
Amount of fire insurance related to damages	$ 500,000	$ 500,000
Clean-Up, repair and other costs associated with the explosion					$ 4,580,000	$ 982,000
Insurance recoveries				$ 3,950,000		2,450,000
Recorded insurance recoveries related to property damage			$ 2,000,000			$ 2,000,000	$ 2,450,000

Insurance Recoveries - Schedule

Insurance Recoveries - Schedule of Costs and Insurance Recoveries (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Interruption Loss [Line Items]
Write off of inventory	$ 3,054	$ 456	$ 2,738	$ 4,389	$ 3,561	$ 3,739
INMETCO [Member]
Business Interruption Loss [Line Items]
Property damage insurance recovery	$ 2,000			2,000		2,450
Cost of clean-up and repairs				64		129
Write off of inventory				265
Write off of fixed assets				653
Gain related to insurance recovery included in cost of sales of nickel-based materials and other services				1,018		2,321
Insurance proceeds related to fixed assets				254		1,791
Costs capitalized				$ 254		$ 1,791

Guarantor Financial Informat130

Guarantor Financial Information - Schedule of Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 25,675	$ 30,714	$ 136,327	$ 244,119
Accounts receivable, net of allowance	42,044	60,242
Inventories, net	40,491	55,008
Prepaid expenses and other current assets	10,115	3,755
Deferred income taxes		5,251
Total current assets	118,325	154,970
Property, plant and equipment, net	254,841	799,093
Other assets
Intangible assets, net	9,451	10,192
Restricted cash	7,939
Deferred income taxes	0
Deferred finance costs and other	1,496	9,262
Total other assets	18,886	19,454
Total assets	392,052	973,517
Current liabilities
Current maturities of long-term debt	433,079	3,044
Accounts payable	64,098	67,734
Accrued expenses	24,830	35,645
Total current liabilities	522,007	106,423
Long-term debt, less current maturities		406,016
Other long-term liabilities	15,505	18,291
Deferred income taxes	3,113	8,602
Commitments and contingencies
Stockholders' equity
Common stock	602	507
Preferred stock
Additional paid-in capital	396,750	313,815
Retained earnings	(550,011)	115,377
Accumulated other comprehensive income (loss)	247	534
Total stockholders' equity (deficit) before noncontrolling interest	(152,412)	430,233
Noncontrolling interest	3,839	3,952
Total stockholders' equity (deficit)	(148,573)	434,185	444,894	383,281
Total liabilities and stockholders' equity (deficit)	392,052	973,517
Eliminations [Member]
Current assets
Accounts receivable, net of allowance	(340)	(154)
Prepaid expenses and other current assets	(6,973)	(6,973)
Total current assets	(7,313)	(7,127)
Other assets
Deferred income taxes	0
Investment in and advances to subsidiaries	491,509	(133,359)
Deferred finance costs and other	(14,824)	(14,946)
Total other assets	476,685	(148,305)
Total assets	469,372	(155,432)
Current liabilities
Current maturities of long-term debt	(14,928)
Accounts payable	(265)	(154)
Accrued expenses	(6,943)	(6,867)
Total current liabilities	(22,136)	(7,021)
Long-term debt, less current maturities	(10,000)	(14,929)
Commitments and contingencies
Stockholders' equity
Preferred stock
Additional paid-in capital	(41,653)	(41,653)
Retained earnings	543,161	(91,829)
Total stockholders' equity (deficit) before noncontrolling interest	501,508	(133,482)
Total stockholders' equity (deficit)	501,508	(133,482)
Total liabilities and stockholders' equity (deficit)	469,372	(155,432)
Issuer [Member]
Current assets
Cash and cash equivalents	45	3,166	101,449	223,515
Accounts receivable, net of allowance	75
Prepaid expenses and other current assets	3,904	1
Total current assets	4,024	3,167
Other assets
Deferred income taxes	0
Investment in and advances to subsidiaries	170,807	743,463
Deferred finance costs and other	14,824	21,457
Total other assets	185,631	764,920
Total assets	189,655	768,087
Current liabilities
Current maturities of long-term debt	338,483
Accounts payable	59
Accrued expenses	3,994	3,994
Total current liabilities	342,536	3,994
Long-term debt, less current maturities		334,617
Commitments and contingencies
Stockholders' equity
Common stock	602	507
Preferred stock
Additional paid-in capital	396,750	313,815
Retained earnings	(550,233)	115,154
Total stockholders' equity (deficit) before noncontrolling interest	(152,881)	429,476
Total stockholders' equity (deficit)	(152,881)	429,476
Total liabilities and stockholders' equity (deficit)	189,655	768,087
Guarantors [Member]
Current assets
Cash and cash equivalents	9,215	15,354	26,782	15,977
Accounts receivable, net of allowance	28,088	40,656
Inventories, net	25,072	43,085
Prepaid expenses and other current assets	13,158	10,672
Deferred income taxes		5,227
Total current assets	75,533	114,994
Property, plant and equipment, net	204,356	745,612
Other assets
Intangible assets, net	9,366	10,098
Restricted cash	7,939
Deferred income taxes	0
Investment in and advances to subsidiaries	(662,599)	(609,021)
Deferred finance costs and other	1,308	2,140
Total other assets	(643,986)	(596,783)
Total assets	(364,097)	263,823
Current liabilities
Current maturities of long-term debt	76,841	3,044
Accounts payable	53,157	57,913
Accrued expenses	27,258	35,702
Total current liabilities	157,256	96,659
Long-term debt, less current maturities	10,000	51,744
Other long-term liabilities	15,467	17,883
Deferred income taxes		6,642
Commitments and contingencies
Stockholders' equity
Preferred stock
Additional paid-in capital	41,653	41,653
Retained earnings	(592,312)	45,290
Total stockholders' equity (deficit) before noncontrolling interest	(550,659)	86,943
Noncontrolling interest	3,839	3,952
Total stockholders' equity (deficit)	(546,820)	90,895
Total liabilities and stockholders' equity (deficit)	(364,097)	263,823
Non-Guarantors [Member]
Current assets
Cash and cash equivalents	16,415	12,194	$ 8,096	$ 4,627
Accounts receivable, net of allowance	14,221	19,740
Inventories, net	15,419	11,923
Prepaid expenses and other current assets	26	55
Deferred income taxes		24
Total current assets	46,081	43,936
Property, plant and equipment, net	50,485	53,481
Other assets
Intangible assets, net	85	94
Deferred income taxes	0
Investment in and advances to subsidiaries	283	(1,083)
Deferred finance costs and other	188	611
Total other assets	556	(378)
Total assets	97,122	97,039
Current liabilities
Current maturities of long-term debt	32,683
Accounts payable	11,147	9,975
Accrued expenses	521	2,816
Total current liabilities	44,351	12,791
Long-term debt, less current maturities		34,584
Other long-term liabilities	38	408
Deferred income taxes	3,113	1,960
Commitments and contingencies
Stockholders' equity
Preferred stock
Retained earnings	49,373	46,762
Accumulated other comprehensive income (loss)	247	534
Total stockholders' equity (deficit) before noncontrolling interest	49,620	47,296
Total stockholders' equity (deficit)	49,620	47,296
Total liabilities and stockholders' equity (deficit)	$ 97,122	$ 97,039

Guarantor Financial Informat131

Guarantor Financial Information - Schedule of Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net sales of zinc material and other goods	$ 331,127	$ 359,487	$ 344,798
Net sales of nickel-based material and other services	47,379	54,020	53,520
EAF dust service fees	36,437	40,430	43,618
Net sales	414,943	453,937	441,936
Cost of sales of zinc material and other goods	385,086	347,391	327,800
Cost of sales of nickel-based material and other services	29,256	32,820	34,399
Cost of EAF dust services	29,318	33,660	34,869
Restructuring expenses		288	7,691
Cost of sales (excluding depreciation and amortization)	443,660	414,159	404,759
(Gain) loss on asset dispositions	(11,029)	915	701
Impairment loss	527,621		9,349
Depreciation and amortization	54,824	35,406	29,678
Selling, general and administrative expenses	26,580	24,149	22,207
Total costs and expenses	1,041,656	474,629	466,694
(Loss) income from operations	(626,713)	(20,692)	(24,758)
Other income (expense)
Interest expense	(39,280)	(21,680)	(2,728)
Interest and other income	946	13,942	6,072
Total other income (expense)	(38,334)	(7,738)	3,344
(Loss) income before income taxes	(665,047)	(28,430)	(21,414)
Income tax (benefit) provision	341	(12,974)	(7,455)
NET (LOSS) INCOME	(665,388)	(15,456)	(13,959)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales of zinc material and other goods	(4,656)		(842)
Net sales of nickel-based material and other services		(70)
EAF dust service fees	(1,309)	(1,377)
Net sales	(5,965)	(1,447)	(842)
Cost of sales of zinc material and other goods	(4,656)	(70)	(842)
Cost of sales of nickel-based material and other services	(1,309)	(1,377)
Cost of sales (excluding depreciation and amortization)	(5,965)	(1,447)	(842)
Total costs and expenses	(5,965)	(1,447)	(842)
Equity in (loss) income of subsidiaries, net of taxes	632,590	(3,331)	12,917
Other income (expense)
Interest expense	1,206	954	957
Interest and other income	(1,085)	(868)	(871)
Total other income (expense)	121	86	86
(Loss) income before income taxes	632,711	(3,245)	13,003
NET (LOSS) INCOME	632,711	(3,245)	13,003
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Selling, general and administrative expenses	1,343	1,540	1,433
Total costs and expenses	1,343	1,540	1,433
(Loss) income from operations	(1,343)	(1,540)	(1,433)
Equity in (loss) income of subsidiaries, net of taxes	(632,590)	3,331	(12,917)
Other income (expense)
Interest expense	(32,556)	(18,181)	(700)
Interest and other income	1,101	934	1,091
Total other income (expense)	(31,455)	(17,247)	391
(Loss) income before income taxes	(665,388)	(15,456)	(13,959)
NET (LOSS) INCOME	(665,388)	(15,456)	(13,959)
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales of zinc material and other goods	208,728	214,802	267,298
Net sales of nickel-based material and other services	47,379	54,090	53,520
EAF dust service fees	37,746	41,807	43,618
Net sales	293,853	310,699	364,436
Cost of sales of zinc material and other goods	273,548	220,615	261,300
Cost of sales of nickel-based material and other services	30,565	34,197	34,399
Cost of EAF dust services	29,318	33,660	34,869
Restructuring expenses		288	7,691
Cost of sales (excluding depreciation and amortization)	333,431	288,760	338,259
(Gain) loss on asset dispositions	(11,029)	915	701
Impairment loss	527,621		9,349
Depreciation and amortization	51,005	32,250	27,281
Selling, general and administrative expenses	23,078	20,211	18,520
Total costs and expenses	924,106	342,136	394,110
(Loss) income from operations	(630,253)	(31,437)	(29,674)
Other income (expense)
Interest expense	(6,287)	(2,919)	(1,695)
Interest and other income		12,497	4,407
Total other income (expense)	(6,287)	9,578	2,712
(Loss) income before income taxes	(636,540)	(21,859)	(26,962)
Income tax (benefit) provision	(1,103)	(16,135)	(9,322)
NET (LOSS) INCOME	(635,437)	(5,724)	(17,640)
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales of zinc material and other goods	127,055	144,685	78,342
Net sales	127,055	144,685	78,342
Cost of sales of zinc material and other goods	116,194	126,846	67,342
Cost of sales (excluding depreciation and amortization)	116,194	126,846	67,342
Depreciation and amortization	3,819	3,156	2,397
Selling, general and administrative expenses	2,159	2,398	2,254
Total costs and expenses	122,172	132,400	71,993
(Loss) income from operations	4,883	12,285	6,349
Other income (expense)
Interest expense	(1,643)	(1,534)	(1,290)
Interest and other income	930	1,379	1,445
Total other income (expense)	(713)	(155)	155
(Loss) income before income taxes	4,170	12,130	6,504
Income tax (benefit) provision	1,444	3,161	1,867
NET (LOSS) INCOME	$ 2,726	$ 8,969	$ 4,637

Guarantor Financial Informat132

Guarantor Financial Information - Schedule of Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (665,388)	$ (15,456)	$ (13,959)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment			0
Net pension liability adjustment	(287)	(133)	911
Comprehensive (loss) income	(665,675)	(15,589)	(13,048)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	632,711	(3,245)	13,003
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment			0
Comprehensive (loss) income	632,711	(3,245)	13,003
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(665,388)	(15,456)	(13,959)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment			0
Comprehensive (loss) income	(665,388)	(15,456)	(13,959)
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(635,437)	(5,724)	(17,640)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment			0
Comprehensive (loss) income	(635,437)	(5,724)	(17,640)
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	2,726	8,969	4,637
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment			0
Net pension liability adjustment	(287)	(133)	911
Comprehensive (loss) income	$ 2,439	$ 8,836	$ 5,548

Guarantor Financial Informat133

Guarantor Financial Information - Schedule of Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands	Jan. 28, 2015	Oct. 30, 2013	Dec. 31, 2015	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net (loss) income						$ (665,388)	$ (15,456)	$ (13,959)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization						54,824	35,406	29,678
Gain on insurance recovery related to fixed assets						(254)		(1,791)
Deferred income tax benefit						(238)	(16,356)	(9,862)
Accretion on debt						3,867	3,766	3,727
Accretion on ESOI liabilities						421	431	445
Amortization and write-off of deferred finance costs						4,976	2,759	2,394
Impairment loss						527,621		9,349
(Gain) loss on asset dispositions						(11,029)	915	701
Losses on write down of inventory supplies						3,054	456	2,738
(Gains) losses on derivative financial instruments						901	(1,054)	5,719
Lower of cost or market adjustment to inventories			$ 3,054	$ 456	$ 2,738	4,389	3,561	3,739
Stock compensation expense						5,420	4,768	3,209
Capitalization of interest						(2,989)	(14,895)	(29,438)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net						18,198	(1,558)	1,338
Decrease (increase) in inventories, net						3,989	10,551	(14,386)
(Increase) decrease in prepaid expenses and other current assets						(1,585)	1,317	3,399
(Increase) decrease in other assets						(580)	(634)	(97)
Increase (decrease) in accounts payable						(3,636)	(46,457)	30,252
(Decrease) increase in accrued expenses						(7,420)	(7,902)	12,667
(Decrease) increase in other long-term liabilities						(3,207)	(277)	2,173
Net cash (used in) provided by operating activities						(68,666)	(40,659)	41,995
Cash Flows from Investing Activities:
Purchase of property, plant and equipment						(33,693)	(110,825)	(311,798)
Insurance proceeds related to fixed assets						254		1,791
Increase in restricted cash						(7,939)
Proceeds related to the sale of land						9,000
Net cash (used in) provided by investing activities						(32,378)	(110,825)	(310,007)
Cash Flows from Financing Activities:
Proceeds from the issuance of debt							51,300	21,300
Distributions to noncontrolling interest equity holders						(113)	(113)	(114)
Borrowings on the Credit Facilities						79,951	33,324	74,500
Repayments on the Credit Facilities						(57,230)	(35,594)	(18,000)
Debt issuance costs						(1,644)	(1,897)	(524)
Borrowings on Credit Agreement						496	1,555	13,358
Repayments on the Credit Agreement						(3,065)	(2,929)	(1,866)
Proceeds from the exercise of stock options						33	941
Tax effect of share based compensation award exercise and vesting						(11)	(33)	(19)
Restricted stock withheld for taxes						(441)	(683)	(411)
Net proceeds from the issuance of stock	$ 69,622	$ 71,996				78,029		71,996
Net cash provided by (used in) financing activities						96,005	45,871	160,220
Net (decrease) increase in cash and cash equivalents						(5,039)	(105,613)	(107,792)
Cash and cash equivalents at beginning of period						30,714	136,327	244,119
Cash and cash equivalents at end of period			25,675		136,327	25,675	30,714	136,327
Eliminations [Member]
Cash Flows from Operating Activities:
Net (loss) income						632,711	(3,245)	13,003
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Amortization and write-off of deferred finance costs							(84)	(86)
Equity in loss (income) of subsidiaries, net of taxes						(632,590)	3,331	(12,917)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net						186	(275)	349
(Increase) decrease in prepaid expenses and other current assets								(425)
(Increase) decrease in other assets						(122)	2,017
Increase (decrease) in accounts payable						(111)	275	(349)
(Decrease) increase in accrued expenses						(76)	(2,019)	425
Net cash (used in) provided by operating activities						(2)
Cash Flows from Investing Activities:
Investment in and advances (to) from subsidiaries						2
Net cash (used in) provided by investing activities						2
Issuer [Member]
Cash Flows from Operating Activities:
Net (loss) income						(665,388)	(15,456)	(13,959)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Accretion on debt						3,867	3,766	3,727
Amortization and write-off of deferred finance costs						2,729	2,389	2,114
Stock compensation expense						323	372	380
Capitalization of interest						(2,989)	(14,248)	(28,550)
Equity in loss (income) of subsidiaries, net of taxes						632,590	(3,331)	12,917
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net						(74)
(Increase) decrease in prepaid expenses and other current assets							7	21
Increase (decrease) in accounts payable						59		(93)
(Decrease) increase in accrued expenses							388	112
Net cash (used in) provided by operating activities						(28,883)	(26,113)	(23,331)
Cash Flows from Investing Activities:
Investment in and advances (to) from subsidiaries						(51,848)	(122,043)	(191,243)
Net cash (used in) provided by investing activities						(51,848)	(122,043)	(191,243)
Cash Flows from Financing Activities:
Proceeds from the issuance of debt							51,300	21,300
Debt issuance costs							(1,652)	(358)
Proceeds from the exercise of stock options						33	941
Tax effect of share based compensation award exercise and vesting						(11)	(33)	(19)
Restricted stock withheld for taxes						(441)	(683)	(411)
Net proceeds from the issuance of stock						78,029		71,996
Net cash provided by (used in) financing activities						77,610	49,873	92,508
Net (decrease) increase in cash and cash equivalents						(3,121)	(98,283)	(122,066)
Cash and cash equivalents at beginning of period						3,166	101,449	223,515
Cash and cash equivalents at end of period			45		101,449	45	3,166	101,449
Guarantors [Member]
Cash Flows from Operating Activities:
Net (loss) income						(635,437)	(5,724)	(17,640)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization						51,005	32,250	27,281
Gain on insurance recovery related to fixed assets						(254)		(1,791)
Deferred income tax benefit						(1,415)	(17,068)	(10,435)
Accretion on ESOI liabilities						421	431	445
Amortization and write-off of deferred finance costs						2,010	314	249
Impairment loss						527,621		9,349
(Gain) loss on asset dispositions						(11,029)	915	701
Losses on write down of inventory supplies						3,054	456	2,738
(Gains) losses on derivative financial instruments						1,118	(1,085)	5,696
Lower of cost or market adjustment to inventories						4,389	3,561	3,739
Stock compensation expense						5,097	4,396	2,829
Capitalization of interest							(647)	(888)
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net						12,567	5,542	3,923
Decrease (increase) in inventories, net						7,485	7,448	(7,521)
(Increase) decrease in prepaid expenses and other current assets						(1,614)	1,358	3,800
(Increase) decrease in other assets						(357)	(2,543)	(125)
Increase (decrease) in accounts payable						(4,756)	(46,102)	26,530
(Decrease) increase in accrued expenses						(4,906)	(5,439)	9,434
(Decrease) increase in other long-term liabilities						(3,197)	(325)	2,173
Net cash (used in) provided by operating activities						(48,198)	(22,262)	60,487
Cash Flows from Investing Activities:
Purchase of property, plant and equipment						(32,878)	(102,351)	(300,739)
Insurance proceeds related to fixed assets						254		1,791
Increase in restricted cash						(7,939)
Proceeds related to the sale of land						9,000
Investment in and advances (to) from subsidiaries						53,214	126,401	191,415
Net cash (used in) provided by investing activities						21,651	24,050	(107,533)
Cash Flows from Financing Activities:
Borrowings on the Credit Facilities						58,751	23,750	51,000
Repayments on the Credit Facilities						(34,130)	(35,420)	(4,500)
Debt issuance costs						(1,644)	(172)	(141)
Borrowings on Credit Agreement						496	1,555	13,358
Repayments on the Credit Agreement						(3,065)	(2,929)	(1,866)
Net cash provided by (used in) financing activities						20,408	(13,216)	57,851
Net (decrease) increase in cash and cash equivalents						(6,139)	(11,428)	10,805
Cash and cash equivalents at beginning of period						15,354	26,782	15,977
Cash and cash equivalents at end of period			9,215		26,782	9,215	15,354	26,782
Non-Guarantors [Member]
Cash Flows from Operating Activities:
Net (loss) income						2,726	8,969	4,637
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization						3,819	3,156	2,397
Deferred income tax benefit						1,177	712	573
Amortization and write-off of deferred finance costs						237	140	117
(Gains) losses on derivative financial instruments						(217)	31	23
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable, net						5,519	(6,825)	(2,934)
Decrease (increase) in inventories, net						(3,496)	3,103	(6,865)
(Increase) decrease in prepaid expenses and other current assets						29	(48)	3
(Increase) decrease in other assets						(101)	(108)	28
Increase (decrease) in accounts payable						1,172	(630)	4,164
(Decrease) increase in accrued expenses						(2,438)	(832)	2,696
(Decrease) increase in other long-term liabilities						(10)	48
Net cash (used in) provided by operating activities						8,417	7,716	4,839
Cash Flows from Investing Activities:
Purchase of property, plant and equipment						(815)	(8,474)	(11,059)
Investment in and advances (to) from subsidiaries						(1,368)	(4,358)	(172)
Net cash (used in) provided by investing activities						(2,183)	(12,832)	(11,231)
Cash Flows from Financing Activities:
Distributions to noncontrolling interest equity holders						(113)	(113)	(114)
Borrowings on the Credit Facilities						21,200	9,574	23,500
Repayments on the Credit Facilities						(23,100)	(174)	(13,500)
Debt issuance costs							(73)	(25)
Net cash provided by (used in) financing activities						(2,013)	9,214	9,861
Net (decrease) increase in cash and cash equivalents						4,221	4,098	3,469
Cash and cash equivalents at beginning of period						12,194	8,096	4,627
Cash and cash equivalents at end of period			$ 16,415		$ 8,096	$ 16,415	$ 12,194	$ 8,096

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) shares in Millions

Jun. 24, 2016USD ($)

Feb. 08, 2016USD ($)

Feb. 02, 2016USD ($)

Feb. 01, 2016USD ($)

Jan. 22, 2016

Jan. 31, 2016USD ($)

Mar. 31, 2016USD ($)

Dec. 31, 2015USD ($)shares

Dec. 31, 2015USD ($)shares

Dec. 31, 2014USD ($)

Dec. 31, 2013USD ($)

Jan. 15, 2016USD ($)

Dec. 31, 2015CADshares

Jul. 06, 2015USD ($)

Apr. 29, 2014USD ($)

Apr. 29, 2014CAD

Dec. 21, 2012CAD

Subsequent Event [Line Items]

Debt default, event of default

On January 5, 2016, the Company received a notice of default from Macquarie related to, among other things, insufficient borrowing base availability under the Macquarie Credit Facility as of December 31, 2015.

Debt default, description of notice

On January 15, 2016, Horsehead, INMETCO and HMP entered into a forbearance agreement with Macquarie. Pursuant to the forbearance agreement, cash held in certain of the Debtors’ third-party bank accounts was transferred to accounts controlled by Macquarie. Disbursements of funds from the controlled accounts were subject to a budget as specified in the forbearance agreement. Pursuant to the forbearance agreement, the Company agreed, among other things, (i) to pay down to $40,000 outstanding borrowings under the Macquarie Credit Facility and (ii) to pay a restructuring fee in an amount ranging from $1,000 to $2,500 in the event the obligations under the Macquarie Credit Facility are not paid in full by February 1, 2016, with the amount of such fee increasing over time from February 1, 2016 through April 30, 2016. The forbearance remained effective until February 1, 2016.

Bankruptcy, voluntary petitions filing date

Feb. 2, 2016

Bankruptcy, court where petitions filed

Ontario Superior Court of Justice

Filed date for proposed chapter 11 plan

Apr. 13, 2016

Second amended joint plan of reorganization confirmed date

Sep. 9, 2016

Units of limited liability company interests of reorganized Company | shares

100

100

100

Repayment of loan

$ 3,065,000

$ 2,929,000

$ 1,866,000

Subsequent Event [Member]

Subsequent Event [Line Items]

Forbearance fee

$ 100,000

Bank of America [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Repayment of loan

121,000

CCM Community Development [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Repayment of loan

$ 757,000

Tecnicas Reunidas [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Repayment of loan

$ 5,000,000

Net settlement amount

$ 7,200,000

DIP Facility [Member]

Subsequent Event [Line Items]

Credit facility maturity date description

The DIP Facility matures on the earlier of (a) February 8, 2017, (b) the earlier of (i) the date of the substantial consummation of the plan of reorganization that is confirmed pursuant to an order of the Bankruptcy Court and recognized by an order of the Canadian Court, (ii) the consummation of a sale of all or substantially all of the assets of the Debtors pursuant to Section 363 of the Bankruptcy Code, and (iii) the date any outstanding extensions of credit under the DIP Facility become due and payable in accordance with the terms of the loan documents, whether by acceleration or otherwise.

DIP Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Senior secured super priority credit facility aggregate principal amount

$ 90,000,000

Interest rate under credit facility

14.00%

Additional interest up on occurrence of default

2.00%

Emergence Equity Units [Member]

Subsequent Event [Line Items]

Percentage amount of limited liability company interests of the reorganized Company

$ 160,000,000

$ 160,000,000

Unit Purchase and Support Agreement [Member]

Subsequent Event [Line Items]

Termination fee

7,500,000

NMTC Loan Agreements [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Forbearance effective date

The Forbearances will be effective until the earliest of (i) July 15, 2016; (ii) the substantial consummation of the Chapter 11 cases by the Debtors; (iii) the dismissal of the Chapter 11 cases or conversion of such cases to cases under Chapter 7 of the Bankruptcy Code; and (iv) the occurrence of any event of default under the NMTC Loan Agreements, which continues for a period of 30 days from notice by the Lenders, other than those events of default that resulted from the Debtors’ commencing the Chapter 11 cases.

Mooresboro Facility [Member]

Subsequent Event [Line Items]

Impairment loss

527,621,000

527,621,000

Net book value of asset

87,643,000

$ 87,643,000

Mooresboro Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Additional expenditures required

$ 117,000,000

Impairment loss

$ 54,266,000

Net book value of asset

$ 31,284,000

Zochem Credit Facility [Member]

Subsequent Event [Line Items]

Debt default, event of default

On January 6, 2016 and January 13, 2016, the Company received notices of default, effective November 30, 2015 and December 31, 2015, from PNC Bank related to failure to comply with the required fixed charge coverage ratio under the 2014 Zochem Credit Facility following transfers of funds to Horsehead in 2015.

Debt default, description of notice

The notice sent on January 13, 2016, demanded immediate payment of all outstanding obligations under the 2014 Zochem Credit Facility. On January 14, 2016, Zochem and the Company entered into a forbearance agreement with PNC Bank. In consideration for the forbearance, Zochem agreed, among other things, to pay a forbearance fee to PNC Bank of $1,000 due and payable on February 1, 2016 and provide a mortgage on Zochem’s currently unencumbered property in Ontario, Canada. The forbearance remained effective until February 1, 2016.

Outstanding borrowings under the revolving credit agreement

17,500,000

$ 17,500,000

$ 19,400,000

CAD 17,500,000

Senior secured super priority credit facility aggregate principal amount

$ 20,000,000

$ 20,000,000

$ 20,000,000

CAD 20,000,000

CAD 15,000,000

Additional interest up on occurrence of default

2.00%

2.00%

2.00%

Zochem Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Forbearance fee

$ 1,000,000

Macquarie Credit Facility [Member]

Subsequent Event [Line Items]

Outstanding borrowings under the revolving credit agreement

$ 59,451,000

$ 59,451,000

Senior secured super priority credit facility aggregate principal amount

$ 80,000,000

Macquarie Credit Facility [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Outstanding borrowings under the revolving credit agreement

$ 40,000,000

Macquarie Credit Facility [Member] | Minimum [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Restructuring fee

1,000,000

Macquarie Credit Facility [Member] | Maximum [Member] | Subsequent Event [Member]

Subsequent Event [Line Items]

Restructuring fee

$ 2,500,000

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information - Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 25,675	$ 30,714	$ 136,327	$ 244,119
Prepaid expenses and other current assets	10,115	3,755
Other assets	18,886	19,454
Total assets	392,052	973,517
LIABILITIES AND STOCKHOLDERS' EQUITY
Current maturities of long term debt	433,079	3,044
Accounts payable	64,098	67,734
Accrued expenses	24,830	35,645
Long term debt		406,016
Common stock	602	507
Additional paid-in capital	396,750	313,815
Retained earnings	(550,011)	115,377
Total stockholders' equity (deficit)	(148,573)	434,185	444,894	383,281
Total liabilities and stockholders' equity (deficit)	392,052	973,517
Parent Company [Member]
ASSETS
Cash and cash equivalents	45	3,166	$ 101,449	$ 223,515
Prepaid expenses and other current assets	75	1
Loan receivable	14,824	14,823
Other assets	3,904	6,634
Investment in and advances to subsidiary	170,807	743,463
Total assets	189,655	768,087
LIABILITIES AND STOCKHOLDERS' EQUITY
Current maturities of long term debt	338,483
Accounts payable	59
Accrued expenses	3,994	3,994
Long term debt		334,617
Common stock	602	507
Additional paid-in capital	396,750	313,815
Retained earnings	(550,233)	115,154
Total stockholders' equity (deficit)	(152,881)	429,476
Total liabilities and stockholders' equity (deficit)	$ 189,655	$ 768,087

Schedule I - Condensed Finan136

Schedule I - Condensed Financial Information - Condensed Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Selling, general and administrative	$ 26,580	$ 24,149	$ 22,207
Interest income	946	13,942	6,072
Interest expense	39,280	21,680	2,728
(Loss) income before income taxes	(665,047)	(28,430)	(21,414)
Income taxes	341	(12,974)	(7,455)
Net loss	(665,388)	(15,456)	(13,959)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Selling, general and administrative	1,343	1,540	1,433
Equity in (loss) income of subsidiary, net of tax provision of $341 and tax benefits of $12,974 and $7,455 for 2015, 2014 and 2013, respectively	(632,590)	3,331	(12,917)
Interest income	1,101	934	1,091
Interest expense	32,556	18,181	700
(Loss) income before income taxes	(665,388)	(15,456)	(13,959)
Income taxes	0	0	0
Net loss	$ (665,388)	$ (15,456)	$ (13,959)

Schedule I - Condensed Finan137

Schedule I - Condensed Financial Information - Condensed Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Income (loss) from subsidiaries, tax expense (benefit)	$ 341	$ 12,974	$ 7,455

Schedule I - Condensed Finan138

Schedule I - Condensed Financial Information - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	Jan. 28, 2015	Oct. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net loss			$ (665,388)	$ (15,456)	$ (13,959)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Non-cash compensation expense			5,420	4,768	3,209
Accretion on debt			3,867	3,766	3,727
Amortization of deferred finance costs			4,976	2,759	2,394
Capitalization of interest			(2,989)	(14,895)	(29,438)
Changes in operating assets and liabilities:
(Increase) in accounts receivable			18,198	(1,558)	1,338
Decrease in prepaid expenses and other current assets			(1,585)	1,317	3,399
Decrease (increase) in accounts payable			(3,636)	(46,457)	30,252
(Decrease) increase in accrued expenses			(7,420)	(7,902)	12,667
Net cash (used in) provided by operating activities			(68,666)	(40,659)	41,995
Cash Flows from Investing Activities:
Net cash used in investing activities			(32,378)	(110,825)	(310,007)
Cash Flows from Financing Activities:
Proceeds from the issuance of debt				51,300	21,300
Debt issuance costs			(1,644)	(1,897)	(524)
Proceeds from the exercise of stock options			33	941
Tax effect of share based compensation award exercise and vesting			(11)	(33)	(19)
Restricted stock withheld for taxes			(441)	(683)	(411)
Net proceeds from the issuance of stock	$ 69,622	$ 71,996	78,029		71,996
Net cash provided by (used in) financing activities			96,005	45,871	160,220
Net decrease in cash and cash equivalents			(5,039)	(105,613)	(107,792)
Cash and cash equivalents at beginning of period			30,714	136,327	244,119
Cash and cash equivalents at end of period			25,675	30,714	136,327
Parent Company [Member]
Cash Flows from Operating Activities:
Net loss			(665,388)	(15,456)	(13,959)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Equity in (loss) income of subsidiaries, net of taxes			632,590	(3,331)	12,917
Non-cash compensation expense			323	372	380
Accretion on debt			3,867	3,766	3,727
Amortization of deferred finance costs			2,729	2,389	2,114
Capitalization of interest			(2,989)	(14,248)	(28,550)
Changes in operating assets and liabilities:
(Increase) in accounts receivable			(74)
Decrease in prepaid expenses and other current assets				7	21
Decrease (increase) in accounts payable			59		(93)
(Decrease) increase in accrued expenses				388	112
Net cash (used in) provided by operating activities			(28,883)	(26,113)	(23,331)
Cash Flows from Investing Activities:
Advances to subsidiaries			(51,848)	(122,043)	(191,243)
Net cash used in investing activities			(51,848)	(122,043)	(191,243)
Cash Flows from Financing Activities:
Proceeds from the issuance of debt				51,300	21,300
Debt issuance costs				(1,652)	(358)
Proceeds from the exercise of stock options			33	941
Tax effect of share based compensation award exercise and vesting			(11)	(33)	(19)
Restricted stock withheld for taxes			(441)	(683)	(411)
Net proceeds from the issuance of stock			78,029		71,996
Net cash provided by (used in) financing activities			77,610	49,873	92,508
Net decrease in cash and cash equivalents			(3,121)	(98,283)	(122,066)
Cash and cash equivalents at beginning of period			3,166	101,449	223,515
Cash and cash equivalents at end of period			$ 45	$ 3,166	$ 101,449