Century Aluminum (CENX) 10-Q 9 May 14 2014 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'CENTURY ALUMINUM CO	'
Entity Central Index Key	'0000949157	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	88,787,795

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$52,498	$84,088
Restricted cash	1,032	1,697
Accounts receivable — net	45,619	56,184
Due from affiliates	56,131	43,587
Inventories	252,099	239,615
Prepaid and other current assets	35,201	32,276
Deferred taxes	13,614	13,614
Total current assets	456,194	471,061
Property, plant and equipment — net	1,239,893	1,247,661
Other assets	90,768	91,474
TOTAL	1,786,855	1,810,196
LIABILITIES:	'	'
Accounts payable, trade	99,975	108,490
Due to affiliates	74,379	53,582
Accrued and other current liabilities	51,644	69,466
Accrued employee benefits costs	8,429	8,410
Industrial revenue bonds	7,815	7,815
Total current liabilities	242,242	247,763
Senior notes payable	246,615	246,528
Accrued pension benefits costs — less current portion	39,981	39,848
Accrued postretirement benefits costs — less current portion	131,196	129,284
Other liabilities	36,984	37,743
Deferred taxes	106,721	106,218
Total noncurrent liabilities	561,497	559,621
COMMITMENTS AND CONTINGENCIES (NOTE 10)	'	'
SHAREHOLDERS' EQUITY:	'	'
Series A Preferred stock (one cent par value, 5,000,000 shares authorized; 160,000 issued and 79,365 outstanding at March 31, 2014; 160,000 issued and 79,620 outstanding at December 31, 2013)	1	1
Common stock (one cent par value, 195,000,000 shares authorized; 93,557,964 issued and 88,771,443 outstanding at March 31, 2014; 93,496,798 issued and 88,710,277 outstanding at December 31, 2013)	936	935
Additional paid-in capital	2,508,882	2,508,574
Treasury stock, at cost	-49,924	-49,924
Accumulated other comprehensive loss	-91,733	-91,832
Accumulated deficit	-1,385,046	-1,364,942
Total shareholders’ equity	983,116	1,002,812
TOTAL	$1,786,855	$1,810,196

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Series A Preferred stock, par value (in dollars per share)	$0.01	$0.01
Series A Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Series A Preferred stock, shares issued (in shares)	160,000	160,000
Series A Preferred stock, shares outstanding (in shares)	79,365	79,620
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized (in shares)	195,000,000	195,000,000
Common stock, shares issued (in shares)	93,557,964	93,496,798
Common stock, shares outstanding (in shares)	88,771,443	88,710,277

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
NET SALES:	'	'
Third-party customers	$135,264	$188,514
Related parties	285,583	132,760
Sales Revenue – net	420,847	321,274
Cost of goods sold	422,605	303,692
Gross profit (loss)	-1,758	17,582
Other operating expense – net	2,414	1,096
Selling, general and administrative expenses	10,062	16,299
Operating income (loss)	-14,234	187
Interest expense – third party	-5,477	-6,076
Interest income – third party	140	131
Net gain (loss) on forward and derivative contracts	-879	15,507
Other income (expense) – net	-253	70
Income (loss) before income taxes and equity in earnings (losses) of joint ventures	-20,703	9,819
Income tax benefit (expense)	1,094	-2,517
Income (loss) before equity in earnings (losses) of joint ventures	-19,609	7,302
Equity in earnings (losses) of joint ventures	-495	951
Net income (loss)	-20,104	8,253
Net income (loss) allocated to common shareholders	($20,104)	$7,567
EARNINGS (LOSS) PER COMMON SHARE:	'	'
Basic and Diluted	($0.23)	$0.09
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:	'	'
Basic	88,717	88,555
Diluted	88,717	89,020

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Comprehensive income (loss):	'	'
Net income (loss)	($20,104)	$8,253
Other comprehensive income before income tax effect:	'	'
Net gain on foreign currency cash flow hedges reclassified as income	-47	-47
Amortization of prior service benefit during the period	-952	-1,028
Amortization of net loss during the period	1,811	2,352
Other comprehensive income before income tax effect	812	1,277
Income tax effect	-713	-382
Other comprehensive income	99	895
Total comprehensive income (loss)	($20,005)	$9,148

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	($20,104)	$8,253
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:	'	'
Unrealized gain on E.ON contingent obligation	-353	-15,722
Accrued and other plant curtailment costs — net	1,092	1,154
Lower of cost or market inventory adjustment	-1,107	5,838
Depreciation	17,768	15,688
Sebree power contract amortization	-5,534	0
Debt discount amortization	88	279
Pension and other postretirement benefits	2,613	1,443
Stock-based compensation	198	217
Equity in (earnings) losses of joint ventures, net of dividends	495	-951
Change in operating assets and liabilities:	'	'
Accounts receivable — net	10,566	-1,998
Due from affiliates	-12,545	-5,691
Inventories	-11,377	-2,728
Prepaid and other current assets	-2,958	-6,072
Accounts payable, trade	-3,825	2,264
Due to affiliates	20,798	10,472
Accrued and other current liabilities	-6,620	7,538
Other — net	64	2,417
Net cash provided by (used in) operating activities	-10,741	22,401
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchase of property, plant and equipment	-9,700	-9,364
Nordural expansion — Helguvik	-93	-1,745
Purchase of carbon anode assets and improvements	-5,724	-150
Proceeds from sale of property, plant and equipment	0	353
Restricted and other cash deposits	665	0
Net cash used in investing activities	-14,852	-10,906
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Borrowings under revolving credit facilities	18,870	0
Repayments under revolving credit facilities	-24,870	0
Issuance of common stock	3	0
Net cash used in financing activities	-5,997	0
CHANGE IN CASH AND CASH EQUIVALENTS	-31,590	11,495
Cash and cash equivalents, beginning of period	84,088	183,976
Cash and cash equivalents, end of period	$52,498	$195,471

General

General	3 Months Ended
	Mar. 31, 2014
General [Abstract]	'
General	'
	General
	The accompanying unaudited interim consolidated financial statements of Century Aluminum Company should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2013. In management’s opinion, the unaudited interim consolidated financial statements reflect all adjustments, which are of a normal and recurring nature, that are necessary for a fair presentation of financial results for the interim periods presented. Operating results for the first three months of 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. Throughout this Form 10-Q, and unless expressly stated otherwise or as the context otherwise requires, "Century Aluminum," "Century," the "Company", "we," "us," "our" and "ours" refer to Century Aluminum Company and its consolidated subsidiaries.

Acquisition_of_Sebree_aluminum

Acquisition of Sebree aluminum smelter	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Acquisition of Sebree aluminum smelter	'
	Acquisition of Sebree aluminum smelter
	On June 1, 2013, our wholly owned subsidiary, Century Aluminum Sebree LLC ("Century Sebree"), acquired the Sebree aluminum smelter ("Sebree") from a subsidiary of Rio Tinto Alcan, Inc. ("RTA"). Sebree, located in Robards, Kentucky, has an annualized hot metal production capacity of 205,000 tonnes of primary aluminum and employs approximately 500 people. The purchase price for the acquisition was $61,000 (subject to customary working capital adjustments), of which we have paid approximately $48,000 as of March 31, 2014. The remaining portion of the purchase price, if any, will be paid following final determination of the applicable working capital adjustments. We are working with RTA to resolve our disagreement relating to the working capital amount in accordance with the procedures set forth in the purchase agreement. We expect the matter to be resolved by the end of the second quarter of 2014. As part of the transaction, RTA retained all historical environmental liabilities of the Sebree smelter and funded the pension plan assumed by Century in accordance with the purchase agreement.
	Purchase Price Allocation
	Allocating the purchase price to the acquired assets and liabilities involves management judgment. We allocated the purchase price to the assets acquired, liabilities assumed, and the bargain gain in accordance with Accounting Standards Codification ("ASC") 805 "Business Combinations."
	The allocation of the purchase price to the assets acquired and liabilities assumed is based on the estimated fair values at the date of acquisition. We have finalized the purchase price allocation for the assets acquired and liabilities assumed, but the final purchase price and gain on bargain purchase are preliminary and subject to change based on any working capital adjustments that occur prior to June 1, 2014, which is the limit of the measurement period for this acquisition.
	Based on the purchase price allocation, we recorded a gain on bargain purchase of $5,253 in 2013. The following table summarizes the fair value of the assets acquired and the liabilities assumed as of the acquisition date:
		Acquisition Date Estimated Fair Value as of March 31, 2014
	Consideration:
	Cash	$	48,083
	Deferred purchase price	1,910
	Assets Acquired:
	Inventories	59,018
	Prepaid and other current assets	2,273
	Property, plant and equipment – net	55,520
	Total assets acquired	$	116,811
	Liabilities Assumed:
	Accrued and other current liabilities	$	43,316
	Accrued pension benefit costs	996
	Accrued post retirement benefit costs	6,544
	Other liabilities	7,476
	Deferred taxes	3,233
	Total liabilities assumed	$	61,565
	Gain on bargain purchase:	$	5,253
	The following unaudited pro forma financial information for the three months ended March 31, 2013 reflects our results of continuing operations as if the acquisition of Sebree had been completed on January 1, 2013. This unaudited pro forma financial information is provided for informational purposes only and is not necessarily indicative of what the actual results of operations would have been had the transactions taken place on January 1, 2013, nor is it indicative of the future consolidated results of operations or financial position of the combined companies.
		Three months ended March 31,
		2013
	Pro forma revenues	$	447,698
	Pro forma loss from continuing operations	(1,187		)
	Loss per common share, basic	(0.01		)
	Loss per common share, diluted	(0.01		)
	Our net income for the three months ended March 31, 2014 includes a non-recurring credit for the amortization of the deferred power contract liability of $5,534. As part of the Sebree acquisition, we recorded a $36,625 liability for an unfavorable power contract we assumed. The fair value measurement of the power contract was based on the difference between the forecasted contract rate and estimated market power rates through the contract termination date in January 2014. We amortized the power contract liability over the remaining period of the contract through January 31, 2014, resulting in a credit to our depreciation and amortization expense within cost of goods sold on the consolidated statement of operations for the three months ended March 31, 2014.

Fair_value_measurements

Fair value measurements	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair value measurements	'
	Fair value measurements
	The following section describes the valuation methodology used to measure our financial assets and liabilities that were accounted for at fair value and are categorized based on the fair value hierarchy described in ASC 820 "Fair Value Measurements and Disclosures."
	Overview of Century’s valuation methodology
		Level	Significant inputs
	Cash equivalents	1	Quoted market prices
	Trust assets (1)	1	Quoted market prices
	Surety bonds	1	Quoted market prices
	E.ON ("E.ON") contingent obligation	3	Quoted LME forward market, management’s estimates of the LME forward market prices for periods beyond the quoted periods and management’s estimate of future level of operations at Century Aluminum of Kentucky, our wholly owned subsidiary ("CAKY")
	Primary aluminum sales contract	3	Management’s estimates of future U.S. Midwest premium and risk-adjusted discount rates
	Midwest premium contracts	3	Management’s estimates of future U.S. Midwest premium
	-1	Trust assets are currently invested in money market funds. These trust assets are held to fund the non-qualified supplemental executive pension benefit obligations for certain of our officers. The trust has sole authority to invest the funds in secure interest producing investments consisting of short-term securities issued or guaranteed by the United States government or cash and cash equivalents.
	Fair value measurements
	Our fair value measurements include the consideration of market risks that other market participants might consider in pricing the particular asset or liability, specifically non-performance risk and counterparty credit risk. Consideration of the non-performance risk and counterparty credit risk are used to establish the appropriate risk-adjusted discount rates used in our fair value measurements.
	The following table sets forth our financial assets and liabilities that were accounted for at fair value on a recurring basis by the level of input within the ASC 820 fair value hierarchy.  As required by generally accepted accounting principles in the United States ("GAAP") for fair value measurements and disclosures, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and the placement within the fair value hierarchy levels. There were no transfers between Level 1 and 2 during the periods presented. There were no transfers into or out of Level 3 during the periods presented. It is our policy to recognize transfers into and transfers out of Level 3 as of the actual date of the event or change in circumstances that caused the transfer.
	Recurring Fair Value Measurements	As of March 31, 2014
		Level 1			Level 2			Level 3		Total
	ASSETS:
	Cash equivalents	$	40,939		$	—		$	—	$	40,939
	Trust assets	10,211			—			—		10,211
	Surety bonds	2,002			—			—		2,002
	TOTAL	$	53,152		$	—		$	—	$	53,152
	LIABILITIES:
	E.ON contingent obligation – net (1)	$	—		$	—		$	—	$	—
	TOTAL	$	—		$	—		$	—	$	—
	Recurring Fair Value Measurements	As of December 31, 2013
		Level 1			Level 2			Level 3		Total
	ASSETS:
	Cash equivalents	$	49,658		$	—		$	—	$	49,658
	Trust assets	11,151			—			—		11,151
	Surety bonds	2,002			—			—		2,002
	Midwest premium contracts	—			—			140		140
	TOTAL	$	62,811		$	—		$	140	$	62,951
	LIABILITIES:
	E.ON contingent obligation – net (1)	$	—		$	—		$	—	$	—
	Primary aluminum sales contract	—			—			140		140
	TOTAL	$	—		$	—		$	140	$	140
	-1	See Note 9 Debt for additional information about the E.ON contingent obligation.
	Change in Level 3 Fair Value Measurements during the three months ended March 31,
		Derivative liabilities - net
		2014			2013
	Beginning balance, January 1	$	—		$	(16,539	)
	Total gain (loss) included in earnings	(940		)	15,509
	Settlements	940			—
	Ending balance, March 31,	$	—		$	(1,030	)
	Amount of gain (loss) included in earnings attributable to the change in unrealized losses relating to assets and liabilities held at March 31,	$	140		$	15,509
	The net gain (loss) on our derivative assets and liabilities is recorded in our consolidated statements of operations under net gain (loss) on forward and derivative contracts. See Note 4 Derivative and hedging instruments for the location of our Level 3 derivative assets and liabilities within our consolidated balance sheets.

Derivative_and_hedging_instrum

Derivative and hedging instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative and hedging instruments	'
	Derivative and hedging instruments
	The following table provides the fair value and balance sheet classification of our derivatives:
	Fair Value of Derivative Assets and Liabilities
		Balance sheet location	March 31, 2014			December 31, 2013
	DERIVATIVE ASSETS:
	Midwest premium contracts	Prepaid and other current assets	$	—		$	140
	TOTAL		$	—		$	140
	DERIVATIVE LIABILITIES:
	Primary aluminum sales contract	Accrued and other current liabilities	$	—		$	140
	E.ON contingent obligation – net (1)	Other liabilities	—			—
	TOTAL		$	—		$	140
	-1	See Note 9 Debt for additional information about the E.ON contingent obligation.
	Midwest premium contracts
	We entered into a fixed-price forward contract that settled monthly from January 2014 to March 2014 based on the
	Midwest Premium price published in the Platts Metals Week for the applicable period. Losses associated with the settlements of the U.S. Midwest premium contracts were recorded in net gain (loss) on forward and derivative contracts on the consolidated
	statement of operations.
	Primary aluminum sales contract
	We had a contract to sell to Glencore Xstrata plc (together with its subsidiaries, "Glencore") primary aluminum produced at Mt. Holly, Hawesville and Sebree through December 31, 2013 (the "Glencore Metal Agreement"). The Glencore Metal Agreement was a physical delivery contract for primary aluminum with variable, LME-based pricing.  Under the Glencore Metal Agreement, pricing was based on market prices, adjusted by a negotiated U.S. Midwest premium with a cap and a floor as applied to the current U.S. Midwest premium.  We accounted for the Glencore Metal Agreement as a derivative instrument under ASC 815 "Derivatives and Hedging."  Gains and losses on the derivative were based on the difference between the contracted U.S. Midwest premium and actual and forecasted U.S. Midwest premiums.  Settlements were recorded in related party sales.  Unrealized gains (losses) based on forecasted U.S. Midwest premiums were recorded in net gain (loss) on forward and derivative contracts on the consolidated statements of operations.
	Derivatives not designated as hedging instruments:
		Gain (loss) recognized in income from derivatives
			Three months ended March 31,
		Location	2014			2013
	E.ON contingent obligation – net	Net gain (loss) on forward and derivative contracts	$	353		$	15,722
	Midwest premium contracts	Net gain (loss) on forward and derivative contracts	(1,080		)	—
	Primary aluminum sales contract	Related party sales	292			355
	Primary aluminum sales contract	Net gain (loss) on forward and derivative contracts	(152		)	(215		)
	E.ON contingent obligation – net	Interest expense – third party	(353		)	(353		)
	We had the following outstanding forward contracts that were entered into that were not designated as hedging instruments:
		March 31, 2014		December 31, 2013
	Primary aluminum sales contract premium (tonnes) (1)	84		1,782
	Midwest premium contracts (tonnes)	—		6,000
	-1	Represents the remaining physical deliveries under the Glencore Metal Agreement.
	Counterparty credit risk. Forward financial contracts are subject to counterparty credit risk.  However, we only enter into forward financial contracts with counterparties we determine to be creditworthy at the time of entering into the contract.  If any counterparty failed to perform according to the terms of the contract, the impact would be limited to the difference between the contract price and the market price applied to the contract volume on the date of settlement.

Earnings_per_share

Earnings per share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings (loss) per share	'
	Earnings (loss) per share
	Basic earnings (loss) per share ("EPS") amounts are calculated by dividing earnings available to common shareholders by the weighted average number of common shares outstanding. Diluted EPS amounts assume the issuance of common stock for all potentially dilutive common shares outstanding. The following table shows the basic and diluted earnings (loss) per share for the three months ended March 31, 2014 and 2013:
		For the three months ended March 31,
		2014							2013
		Loss			Shares (000)	Per-Share			Income			Shares (000)	Per-Share
	Net income (loss)	$	(20,104	)					$	8,253
	Amount allocated to common shareholders (1)	100		%					91.69		%
	Basic EPS:
	Income (loss) allocable to common shareholders	(20,104		)	88,717	$	(0.23	)	7,567			88,555	$	0.09
	Effect of Dilutive Securities:
	Share-based compensation plans	—			—				—			465
	Diluted EPS:
	Income (loss) applicable to common shareholders with assumed conversion	$	(20,104	)	88,717	$	(0.23	)	$	7,567		89,020	$	0.09
	-1	We have not allocated net losses between common and preferred shareholders, as the holders of our preferred shares do not have a contractual obligation to share in the loss.
	Antidilutive securities excluded from the calculation of diluted EPS:	Three months ended March 31,
		2014		2013
	Stock options (1)	603,032		347,934
	Service-based share awards (1)	442,456		—
	-1	In periods when we report a net loss, all share awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on earnings (loss) per share.

Shareholders_equity

Shareholders' equity	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity Note [Abstract]	'
Shareholders' equity	'
	Shareholders’ equity
	Common Stock
	Under our Restated Certificate of Incorporation, our Board of Directors is authorized to issue up to 195,000,000 shares of our common stock.
	The rights, preferences and privileges of holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of our preferred stock which are currently outstanding, including our Series A Convertible Preferred Stock, or which we may designate and issue in the future.
	Stock Repurchase Program
	In August 2011, our Board of Directors approved a stock repurchase program. Under the program, we may repurchase up to $60,000 of our outstanding shares of common stock from time to time on the open market at prevailing market prices, in block trades or otherwise. The timing and amount of any shares repurchased is determined by our management based on its evaluation of market conditions, the trading price of the stock and other factors. The repurchase program may be suspended or discontinued at any time.
	Shares of common stock repurchased are recorded at cost as treasury stock and result in a reduction of shareholders’ equity in the consolidated balance sheets. From time to time, treasury shares may be reissued as contributions to our employee benefit plans and for the conversion of convertible preferred stock. When shares are reissued, we use an average cost method for determining cost. The difference between the cost of the shares and the reissuance price is added to or deducted from additional paid-in capital.
	From August 11, 2011 through March 31, 2014, we repurchased 4,786,521 shares of common stock for an aggregate purchase price of $49,924. We have made no repurchases since March 2012 and had approximately $10,076 remaining under the repurchase program authorization as of March 31, 2014.
	Series A Convertible Preferred Stock
	Glencore holds all shares of the issued and outstanding Series A Convertible Preferred Stock. The issuance of common stock under our stock incentive programs, debt exchange transactions and any stock offering that excludes Glencore participation triggers anti-dilution provisions of the preferred stock agreement and results in the automatic conversion of Series A Convertible Preferred Stock shares into shares of common stock. See Common and Preferred Stock Activity table below for additional information about preferred stock conversions during the period.
	Common and Preferred Stock Activity:	Preferred stock		Common stock
	(in shares)	Series A convertible		Treasury	Outstanding
	Beginning balance as of December 31, 2013	79,620		4,786,521	88,710,277
	Conversion of convertible preferred stock	(255	)	—	25,542
	Issuance for share-based compensation plans	—		—	35,624
	Ending balance as of March 31, 2014	79,365		4,786,521	88,771,443
	Beginning balance as of December 31, 2012	80,283		4,786,521	88,548,637
	Conversion of convertible preferred stock	(199	)	—	19,864
	Issuance for share-based compensation plans	—		—	27,708
	Ending balance as of March 31, 2013	80,084		4,786,521	88,596,209

Income_taxes

Income taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income taxes	'
	Income taxes
	We recorded an income tax benefit for the three months ended March 31, 2014 of $1,094, which primarily consisted of foreign and state income taxes. Our domestic deferred tax assets, net of deferred tax liabilities, are subject to a valuation allowance; therefore, the domestic losses were not benefited.
	We recorded income tax expense for the three months ended March 31, 2013 of $2,517, which primarily consisted of foreign and state income taxes.
	Our income tax benefit or expense is based on an annual effective tax rate forecast, including estimates and assumptions that could change during the year. The application of the requirements for accounting for income taxes in interim periods, after consideration of our valuation allowance, causes a significant variation in the typical relationship between income tax expense and pretax accounting income. For the first quarter of 2014, the application of our effective tax rate resulted in a benefit primarily due to not recognizing the benefit of current period losses in certain domestic jurisdictions where it is not more likely than not that such benefits would be realized.
	As of March 31, 2014, all of Century's U.S. and certain foreign deferred tax assets, net of deferred tax liabilities, continue to be subject to a valuation allowance. The realization of these assets is dependent on substantial future taxable income which, at March 31, 2014, is not more likely than not to be achieved.
	Our Icelandic tax returns are subject to examination beginning with the 2008 tax year. Our 2010 through 2012 tax years are currently under review by the Directorate of Internal Revenue of Iceland.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2014
Inventory, Net [Abstract]	'
Inventories	'
	Inventories
	Inventories consist of the following:	March 31, 2014		December 31, 2013
	Raw materials	$	65,189	$	69,776
	Work-in-process	21,247		22,183
	Finished goods	33,589		17,661
	Operating and other supplies	132,074		129,995
	Inventories	$	252,099	$	239,615
	Inventories are stated at the lower of cost or market, using the first-in, first-out method.

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
		March 31, 2014			December 31, 2013
	Debt classified as current liabilities:
	Hancock County industrial revenue bonds ("IRBs") due 2028, interest payable quarterly (variable interest rates (not to exceed 12%)) (1)	$	7,815		$	7,815
	7.5% senior unsecured notes payable due August 15, 2014, interest payable semiannually (2)	2,603			2,603
	Iceland revolving credit facility (2)(3)	—			6,000
	Debt classified as non-current liabilities:
	7.5% senior secured notes payable due June 1, 2021, net of debt discount of $3,385 and $3,472, respectively, interest payable semiannually	246,615			246,528
	TOTAL	$	257,033		$	262,946
	-1	The IRBs are classified as current liabilities because they are remarketed weekly and could be required to be repaid upon demand if there is a failed remarketing. The IRB interest rate at March 31, 2014 was 0.26%.
	-2	These items are recorded in Accrued and other current liabilities based on the repayment terms and expected maturity.
	-3	Borrowings under the Iceland revolving credit facility bear variable interest based on LIBOR plus the applicable margin per annum. The interest rate at December 31, 2013 was 3.92%.
	U.S. Revolving Credit Facility
	General.  We and certain of our direct and indirect domestic subsidiaries (together with Century, the "Borrowers") and Wells Fargo Capital Finance, LLC, as lender and agent, and Credit Suisse AG, BNP Paribas, and Morgan Stanley Senior Funding Inc., as lenders, entered into the Amended and Restated Loan and Security Agreement (the "U.S. revolving credit facility"), dated May 24, 2013, as amended, modifying the credit facility signed July 1, 2010. The U.S. revolving credit facility has a term through May 24, 2018 and provides for borrowings of up to $150,000 in the aggregate, including up to $80,000 under a letter of credit sub-facility.  Any letters of credit issued and outstanding under the U.S. revolving credit facility reduce our borrowing availability on a dollar-for-dollar basis.
	Status of our U.S. revolving credit facility:
		March 31, 2014
	Credit facility maximum amount	$	150,000
	Borrowing availability, net of outstanding letters of credit	79,455
	Outstanding borrowings	—
	Letter of credit sub-facility amount	80,000
	Outstanding letters of credit issued	70,545
	Borrowing Base.  The availability of funds under the U.S. revolving credit facility is limited by a specified borrowing base consisting of accounts receivable and inventory of the Borrowers which meet the eligibility criteria.
	Guaranty.  The Borrowers' obligations under the U.S. revolving credit facility are guaranteed by certain of our domestic subsidiaries and secured by a continuing lien upon and a security interest in all of the Borrowers' accounts receivable, inventory and certain bank accounts.  Each Borrower is liable for any and all obligations under the U.S. revolving credit facility on a joint and several basis.
	Interest Rates and Fees.  Any amounts outstanding under the U.S. revolving credit facility will bear interest, at our option, at LIBOR or a base rate, plus, in each case, an applicable interest margin.  The applicable interest margin is determined based on the average daily availability for the immediately preceding quarter.  In addition, we pay an unused line fee on undrawn amounts, less the amount of our letters of credit exposure.  For standby letters of credit, we are required to pay a fee on the face amount of such letters of credit that varies depending on whether the letter of credit exposure is cash collateralized.
	Iceland Revolving Credit Facility
	General. Nordural Grundartangi ehf, as borrower, and Landsbankinn hf., as lender, entered into a three-year $50,000 Committed Revolving Credit Facility agreement (the "Iceland revolving credit facility"), dated November 27, 2013. Grundartangi may in the future use the Iceland revolving credit facility to repay existing indebtedness or to finance capital expenditures and for ongoing working capital needs and other general corporate purposes. Under the terms of the Iceland revolving credit facility, when Grundartangi borrows funds it will designate a repayment date, which may be any date prior to the maturity of the Iceland revolving credit facility. The Iceland revolving credit facility will mature on November 27, 2016.
	Status of our Iceland revolving credit facility:
		March 31, 2014
	Credit Facility maximum amount	$	50,000
	Borrowing availability	50,000
	Outstanding borrowings	—
	Borrowing Base.  The availability of funds under the Iceland revolving credit facility is limited by a specified borrowing base consisting of inventory and accounts receivable of Grundartangi.
	Security.  Grundartangi's obligations under the Iceland revolving credit facility are secured by a general bond under which Grundartangi's inventory and accounts receivable are pledged to secure full payment of the loan.
	Interest Rates and Fees.  Any amounts outstanding under the Iceland revolving credit facility will bear interest at LIBOR plus the margin per annum.
	7.5% Notes due 2021
	General.  On June 4, 2013, we issued $250,000 of our 7.5% Notes due 2021 in a private offering exempt from the registration requirements of the Securities Act.  The 7.5% Notes due 2021 were issued at a discount and we received proceeds of $246,330, prior to payment of financing fees and related expenses.
	Interest rate.  The 7.5% Notes due 2021 bear interest at 7.5% per annum on the principal amount, payable semi-annually in arrears in cash on June 1st and December 1st of each year.
	Maturity.  The 7.5% Notes due 2021 mature on June 1, 2021.
	E.ON contingent obligation
	The E.ON contingent obligation consists of the aggregate E.ON payments made to Big Rivers Electric Corporation ("Big Rivers") on CAKY’s behalf in excess of the agreed upon base amount under the long-term cost-based power contract with Kenergy, a member cooperative of Big Rivers (the "Big Rivers Agreement"). Our obligation to make repayments is contingent upon certain operating criteria for Hawesville and the LME price of primary aluminum. When the conditions for repayment are met, and for so long as those conditions continue to be met, we will be obligated to make principal and interest payments, in up to 72 monthly payments.
	Based on the LME forward market prices for primary aluminum at March 31, 2014 and management's estimate of the LME forward market for periods beyond the quoted periods, we recognized a derivative asset which offsets our contingent obligation. As a result, our net liability decreased and we recorded a gain of $353 and $15,722 in net gain (loss) on forward and derivative contracts for the three months ended March 31, 2014 and 2013, respectively. In addition, we believe that we will not have any payment obligations for the E.ON contingent obligation through the term of the agreement, which expires in 2028. However, future increases in the LME forward market may result in a partial or full derecognition of the derivative asset and a corresponding recognition of a loss. The following table provides information about the balance sheet location and gross amounts offset:
	Offsetting of financial instruments and derivatives
		Balance sheet location	31-Mar-14			31-Dec-13
	E.ON contingent obligation – principal	Other liabilities	$	(12,902	)	$	(12,902	)
	E.ON contingent obligation – accrued interest	Other liabilities	(4,231		)	(3,879		)
	E.ON contingent obligation – derivative asset	Other liabilities	17,133			16,781
			$	—		$	—

Commitments_and_contingencies

Commitments and contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and contingencies	'
	Commitments and contingencies
	Environmental Contingencies
	Based upon all available information, we believe our current environmental liabilities do not have, and are not likely to have, a material adverse effect on our financial condition, results of operations or liquidity. Because of the issues and uncertainties described below and the inability to predict the requirements of future environmental laws, there can be no assurance that future capital expenditures and costs for environmental compliance at currently or formerly owned or operated properties will not result in liabilities which may have a material adverse effect.
	It is our policy to accrue for costs associated with environmental assessments and remedial efforts when it becomes probable that a liability has been incurred and the costs can be reasonably estimated. The aggregate environmental-related accrued liabilities were $1,113 and $999 at March 31, 2014 and December 31, 2013, respectively. All accrued amounts have been recorded without giving effect to any possible future recoveries. With respect to costs for ongoing environmental compliance, including maintenance and monitoring, such costs are expensed as incurred.
	Century Aluminum of West Virginia ("CAWV") continues to perform monitoring activities at our Ravenswood, West Virginia facility pursuant to an order issued by the United States Environmental Protection Agency (the "EPA") in 1994 (the "3008(h) Order").  CAWV also conducted a RCRA facility investigation ("RFI") under the 3008(h) Order evaluating other areas at Ravenswood that may have contamination requiring remediation. The RFI has been approved by appropriate agencies.  CAWV has completed interim remediation measures at two sites identified in the RFI, and we believe no further remediation will be required. A Corrective Measures Study, which formally documents the conclusion of these activities, has been submitted to the EPA and a final order has been completed and was signed by the EPA in April 2013. Under the order, CAWV's responsibilities going forward include monitoring specific wells as well as restricting access to certain parts of the site.
	Prior to our purchase of Hawesville, the EPA issued a final Record of Decision ("ROD") under the Comprehensive Environmental Response, Compensation and Liability Act of 1980 ("CERCLA"). By agreement, Southwire Company ("Southwire"), the former owner and operator, is to perform all obligations under the ROD.  CAKY has agreed to operate and maintain the ground water treatment system required under the ROD on behalf of Southwire, and Southwire will reimburse CAKY for any expense that exceeds $400 annually. The groundwater treatment system ceased operations in May 2010 and was decommissioned and removed from site in 2012. Quarterly monitoring of specific wells is ongoing.
	In July 2006, we were named as a defendant, together with certain affiliates of Alcan Inc., in a lawsuit brought by Alcoa Inc. seeking to determine responsibility for certain environmental indemnity obligations related to the sale of a cast aluminum plate manufacturing facility located in Vernon, California, which we purchased from Alcoa Inc. in December 1998, and sold to Alcan Rolled Products-Ravenswood LLC in July 1999. The complaint also seeks costs and attorney fees. The matter is in a preliminary stage, and we cannot predict the ultimate outcome of this action or estimate a range of possible losses related to this matter at this time.
	Matters relating to the St. Croix Alumina Refining Facility
	We are a party to an EPA Administrative Order on Consent (the "Order") pursuant to which other past and present owners of an alumina refining facility at St. Croix, Virgin Islands (the "St. Croix Alumina Refinery") have agreed to carry out a Hydrocarbon Recovery Plan to remove and manage hydrocarbons floating on groundwater underlying the facility.  Pursuant to the Hydrocarbon Recovery Plan, recovered hydrocarbons and groundwater are delivered to the adjacent petroleum refinery where they are received and managed. In connection with the sale of the facility by Lockheed Martin Corporation ("Lockheed") to one of our affiliates, Virgin Islands Alumina Corporation ("Vialco"), in 1989, Lockheed, Vialco and Century entered into the Lockheed-Vialco Asset Purchase Agreement. The indemnity provisions contained in the Lockheed-Vialco Asset Purchase Agreement allocate responsibility for certain environmental matters. Lockheed has tendered indemnity and defense of the above matter to Vialco. We have likewise tendered indemnity to Lockheed. Through March 31, 2014, we have expended approximately $1,033 on the Hydrocarbon Recovery Plan.  At this time, we are not able to estimate the amount of any future potential payments under this indemnification to comply with the Order, but we do not anticipate that any such amounts will have a material adverse effect on our financial condition, results of operations or liquidity, regardless of the final outcome.
	In May 2005, we and Vialco were among several defendants listed in a lawsuit filed by the Commissioner of the Department of Planning and Natural Resources ("DPNR"), in his capacity as Trustee for Natural Resources of the United States Virgin Islands.  The complaint alleges damages to natural resources caused by alleged releases from the St. Croix Alumina Refinery and the adjacent petroleum refinery.  The primary cause of action is pursuant to the natural resource damage provisions of CERCLA, but various ancillary Territorial law causes of action were included as well.  We and Lockheed have each tendered indemnity and defense of the case to the other pursuant to the terms of the Lockheed-Vialco Asset Purchase Agreement.  The complaint seeks unspecified monetary damages, costs and attorney fees. In November 2011, the court granted a motion by Century, dismissing Century from the case. Vialco, however, remains a defendant in this case and has asserted factual and affirmative defenses. The trial is currently scheduled to commence on June 24, 2014.
	In December 2006, Vialco and the succeeding owners of the St. Croix Alumina Refinery were named as defendants in a separate lawsuit filed by the Commissioner of the DPNR. The complaint alleges the defendants failed to take certain actions specified in a Coastal Zone management permit issued to Vialco in October 1994, and alleges violations of territorial water pollution control laws during the various defendants’ periods of ownership. The complaint seeks statutory and other unspecified monetary penalties for the alleged violations. On March 19, 2012, the plaintiff filed a motion to dismiss the settling defendants in the DPNR case described above from this action.  On May 9, 2012, the court granted plaintiff's motion to dismiss leaving Vialco as the only remaining defendant in this action.  No additional developments have occurred on this case since March 2012.
	In May 2009, St. Croix Renaissance Group, L.L.L.P. ("SCRG") filed a third-party complaint for contribution and other relief against several third-party defendants, including Century and Vialco, relating to a lawsuit filed against SCRG seeking recovery of response costs relating to the aforementioned DPNR CERCLA matter. In February 2011, the court granted a motion by Century, dismissing Century from the case. In March 2011, the court granted the remaining defendants’, including Vialco’s, motion for summary judgment, dismissing the case. The plaintiff filed a notice of appeal with the Third Circuit Court of Appeals in May 2011. On June 5, 2013, the Third Circuit Court of Appeals reversed the lower court's ruling, holding that plaintiff's expenditures of funds may be found as recoverable response costs incurred by the government entitling plaintiffs to recover future response costs. Vialco remains the only Century entity in the litigation. No further developments have occurred.
	In December 2010, Century was among several defendants listed in a lawsuit filed by plaintiffs who either worked, resided or owned property in the area downwind from the St. Croix Alumina Refinery. In March 2011, Century was also named a defendant in a nearly identical suit brought by certain additional plaintiffs. The plaintiffs in both suits allege damages caused by the presence of red mud and other particulates coming from the alumina facility and are seeking unspecified monetary damages, costs and attorney fees as well as certain injunctive relief. We have tendered indemnity and defense to St. Croix Alumina LLC and Alcoa Alumina & Chemical LLC under the terms of an acquisition agreement relating to the facility and have filed motions to dismiss plaintiffs’ claims, but the court has not yet ruled on the motions. At this time, it is not practicable to predict the ultimate outcome of or to estimate a range of possible losses for any of the foregoing actions relating to the St. Croix Alumina Refinery.
	Legal Contingencies
	In addition to the foregoing matters, we have pending against us or may be subject to various lawsuits, claims and proceedings related primarily to employment, commercial, shareholder, safety and health matters.
	In evaluating whether to accrue for losses associated with legal contingencies, it is our policy to take into consideration factors such as the facts and circumstances asserted, our historical experience with contingencies of a similar nature, the likelihood of our prevailing and the severity of any potential loss.  For some matters, no accrual is established because we have assessed our risk of loss to be remote.  Where the risk of loss is probable and the amount of the loss can be reasonably estimated, we record an accrual, either on an individual basis or with respect to a group of matters involving similar claims, based on the factors set forth above.
	When we have assessed that a loss associated with legal contingencies is reasonably possible, we determine if estimates of possible losses or ranges of possible losses are in excess of related accrued liabilities, if any.  Based on current knowledge, management has ascertained estimates for losses that are reasonably possible and management does not believe that any reasonably possible outcomes in excess of our accruals, if any, either individually or in aggregate, would be material to our financial condition, results of operations, or liquidity. We reevaluate and update our assessments and accruals as matters progress over time.
	In December 2013, we received a ruling in the arbitration of a lawsuit filed by our former Chief Executive Officer, Logan Kruger.  In the lawsuit, Mr. Kruger alleged that Century had breached the employment and severance protection agreements between Century and Mr. Kruger and that Century was obligated to make various severance payments to him in excess of $20,000. In its ruling, the arbitration panel awarded Mr. Kruger approximately $8,700 in severance payments, plus accrued interest, but rejected Mr. Kruger’s claims for further severance payments and held that Mr. Kruger had forfeited all of his outstanding incentive awards upon his resignation from Century. We recorded a net charge of approximately $8,400 in selling, general and administrative expenses for the year ended December 31, 2013.
	In April 2013, our subsidiary Nordural Grundartangi ehf received a ruling in an arbitration case involving two of its power suppliers, HS Orka hf ("HS") and Orkuveita Reykjavikur ("OR"). Under the arbitration award, Nordural Grundartangi ehf is restricted from reducing power under its existing power contracts with HS and OR in order to take power under a separate power contract with OR originally intended to be used at Helguvik. Nordural Grundartangi ehf remains entitled to take power under the OR Helguvik contract to the extent that its power needs exceed the amount of power provided under its existing power contracts. As part of the award, the tribunal awarded HS damages and Nordural Grundartangi ehf paid $1,470 to HS in full satisfaction of such award. The tribunal ordered each party to pay its own legal fees and costs. While no damages were awarded to OR as part of the arbitration, OR has subsequently alleged damages against Nordural Grundartangi ehf.  We intend to defend ourselves against these claims and expect that any possible losses incurred in the ultimate resolution of this dispute in excess of the amount accrued will not be material.
	Ravenswood Retiree Medical Benefits changes
	In November 2009, CAWV filed a class action complaint for declaratory judgment against the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union ("USWA"), the USWA’s local and certain CAWV retirees, individually and as class representatives, seeking a declaration of CAWV’s rights to modify/terminate retiree medical benefits.  Later in November 2009, the USWA and representatives of a retiree class filed a separate suit against CAWV, Century Aluminum Company, Century Aluminum Master Welfare Benefit Plan, and various John Does with respect to the foregoing.  These actions, entitled Dewhurst, et al. v. Century Aluminum Co., et al., and Century Aluminum of West Virginia, Inc. v. United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, AFL-CIO/CLC, et al., have been consolidated and venue has been set in the District Court for the Southern District of West Virginia. In January 2010, the USWA filed a motion for preliminary injunction to prevent us from implementing any modifications to the retiree medical benefits while these lawsuits are pending, which was dismissed by the trial court, and affirmed upon appeal. The case in chief is currently proceeding in the trial court.
	PBGC Settlement
	In June 2011, the Pension Benefit Guaranty Corporation (the "PBGC") informed us that it believed a "cessation of operations" under ERISA had occurred at our Ravenswood facility as a result of the curtailment of operations at the facility. Although we disagree that a "cessation of operations" occurred, we entered into a settlement agreement with the PBGC in April 2013 to resolve the matter. Pursuant to the terms of the agreement, we will make additional contributions (above any minimum required contributions) to our defined benefit pension plans totaling approximately $17,400 over the term of the agreement. During 2013, we made contributions pursuant to this agreement of approximately $6,700. Under certain circumstances, in periods of lower primary aluminum prices relative to our cost of operations, we may defer one or more of these payments, but we would be required to provide the PBGC with acceptable security for any deferred payments. In the first quarter of 2014, we elected to defer contributions under the PBGC agreement and have provided the PBGC with the appropriate security.
	Power Commitments
	Hawesville
	In August 2012, CAKY issued a 12-month notice to terminate its long-term power supply arrangement with Kenergy. Pursuant to the termination notice, the Hawesville Power Agreement terminated on August 20, 2013.
	The Kentucky Public Service Commission ("KPSC") approved a new power supply agreement with Kenergy and Big Rivers which provides market-based power to the Hawesville smelter, effective August 20, 2013. Under the arrangement, the power companies purchase power on the open market and pass it through to Hawesville at Midcontinent Independent System Operator ("MISO") pricing plus transmission and other costs incurred by them. In connection with the new power arrangement, CAKY has received approval from applicable regional transmission organizations and regulatory bodies regarding grid stability and energy import capability.
	Sebree
	In January 2013, Sebree (then still owned by RTA) issued a 12-month notice to terminate its long-term power supply agreement (the "Sebree Power Agreement") with Kenergy. Pursuant to the termination notice, the Sebree Power Agreement terminated on January 31, 2014. The KPSC approved a new power supply arrangement with Kenergy and Big Rivers which provides market-based power to the Sebree smelter, effective February 1, 2014. Similar to the arrangement at Hawesville, the power companies purchase power on the open market and pass it through to Sebree at MISO pricing plus transmission and other costs incurred by them.
	Mt. Holly
	Mt. Holly has a power purchase agreement (the "Santee Cooper Agreement") with the South Carolina Public Service Authority ("Santee Cooper") with a term through December 2015.  The Santee Cooper Agreement provides power for Mt. Holly’s full production capacity requirements at prices based on published rate schedules (which are subject to change), with adjustments for fuel prices and other items.  The Santee Cooper Agreement restricts Mt. Holly’s ability to reduce its power consumption (or the associated payment obligations) below contracted levels and to terminate the agreement, unless, in each case, the LME falls below certain negotiated levels.
	In 2012, Mt. Holly and Santee Cooper amended the terms of the Santee Cooper Agreement in order to allow Mt. Holly to receive all or a portion of Mt. Holly's supplemental power requirements from an off-system natural gas-fired power generation facility (the "off-system facility").  The energy charge for supplemental power from the off-system facility is based, among other factors, on the cost of natural gas rather than Santee Cooper's system average fuel costs, which are primarily coal-based. The amended power agreement provides that Mt. Holly may continue to receive its supplemental power requirements from the off-system facility through December 31, 2015. We are currently in discussions with Santee Cooper and other parties regarding power arrangements for Mt. Holly following December 31, 2015. The deadline to give notice to reduce the contract demand to zero effective December 31, 2015 is June 30, 2014.
	Ravenswood
	CAWV has a power purchase agreement (the "APCo Agreement") with the Appalachian Power Company ("APCo").  CAWV currently purchases a limited amount of power under the APCo Agreement as necessary to maintain its Ravenswood smelter, which is presently curtailed.  Power is supplied under the APCo Agreement at prices set forth in published tariffs (which are subject to change), with certain adjustments.
	Grundartangi
	Nordural Grundartangi ehf has power purchase agreements with HS, Landsvirkjun and OR to provide power to its Grundartangi smelter.  These power purchase agreements, which will expire on various dates from 2019 through 2036, provide power at LME-based variable rates.  Each power purchase agreement contains take-or-pay obligations with respect to a significant percentage of the total committed and available power under such agreement.
	In the fourth quarter of 2011, an additional 47.5 MW of power became available under a power purchase agreement with OR. This power can be used at either Grundartangi or Helguvik and is currently being utilized at Grundartangi.
	In June 2012, Nordural Grundartangi ehf entered into a new supplemental power contract with Landsvirkjun. The supplemental power contract, which will expire in October 2029 (or upon the occurrence of certain earlier events), will provide Nordural Grundartangi ehf with supplemental power, as Nordural Grundartangi ehf may request from time to time, at LME-based variable rates. Nordural Grundartangi ehf has agreed to make certain prepayments to Landsvirkjun for power expected to be used at a later date in connection with the contract, which will reduce the price paid for power at the time of consumption. As of March 31, 2014, these power prepayments totaled approximately $2,000. We expect the amount of the prepayment to continue to grow slowly and we do not expect to realize the benefits from the prepayments in the near term.
	Helguvik
	Nordural Helguvik ehf has power purchase agreements with HS and OR to provide power to the Helguvik project.  These power purchase agreements provide power at LME-based variable rates and contain take-or-pay obligations with respect to a significant percentage of the total committed and available power under such agreements.  The first stage of power under the OR power purchase agreement (approximately 47.5 MW) became available in the fourth quarter of 2011 and is currently being utilized at Grundartangi.  No other power is currently available under either power purchase agreement.  HS (with respect to all phases) and OR (with respect to all phases other than the first phase) have alleged that certain conditions to the delivery of power under the power purchase agreements have not been satisfied.  Nordural Helguvik ehf is in discussions with both HS and OR with respect to such conditions and other matters pertaining to these agreements.
	Other Commitments and Contingencies
	Labor Commitments
	Approximately 73% of our U.S. based work force is represented by the USWA. CAKY’s Hawesville employees represented by the USWA are under a collective bargaining agreement that expires on March 31, 2015. The Sebree employees represented by the USWA are under a collective bargaining agreement that expires on October 28, 2014.
	In April 2010, Nordural Grundartangi ehf entered into a new labor agreement with the five labor unions representing approximately 82% of Grundartangi’s work force. The labor agreement expires on December 31, 2014.
	In July 2013, Century Vlissingen entered into a collective labor agreement with Vlissingen employees represented by the Federation for the Metal and Electrical Industry ("FME") which comprise approximately 77% of Vlissingen's work force. The labor agreement expires on May 1, 2015.
	The labor agreement for CAWV’s Ravenswood plant employees represented by the USWA expired on August 31, 2010.

Forward_delivery_contracts_and

Forward delivery contracts and financial instruments	3 Months Ended
	Mar. 31, 2014
Forward delivery contracts [Abstract]	'
Forward delivery contracts and financial instruments	'
		Forward delivery contracts and financial instruments
	As a producer of primary aluminum, we are exposed to fluctuating raw material and primary aluminum prices. From time to time we enter into fixed and market priced contracts for the sale of primary aluminum and the purchase of raw materials in future periods.
	Forward Physical Delivery Agreements
	Primary Aluminum Sales Contracts
	Contract	Customer	Volume	Term	Pricing
	Glencore Grundartangi Metal Agreement (1)	Glencore	All primary aluminum produced at Grundartangi, net of tolling and other sales commitments	January 1, 2014 through December 31, 2017	Variable, based on LME and European Duty Paid premium
	Southwire Metal Agreement (2)	Southwire	216 million pounds per year (high conductivity molten aluminum)	January 1, 2014 through December 31, 2014	Variable, based on U.S. Midwest Transaction Price
	-1	The Glencore Grundartangi Metal Agreement is for all metal produced at Grundartangi from 2014 through 2017 less commitments under existing tolling and other sales contracts.  Grundartangi currently estimates that it will sell Glencore approximately 155,000 tonnes of aluminum under this agreement in 2014.
	-2	Southwire may, at its option, increase the volume purchased under the agreement by up to four percent by adjusting their monthly metal commitment.
	Tolling Contracts
	Contract	Customer	Volume	Term	Pricing
	Glencore Toll Agreement	Glencore	90,000 tonnes per year ("tpy")	Through July 2016	Variable, based on LME and European Duty Paid premium
	Glencore Toll Agreement	Glencore	49,000 tpy	Through December 31, 2014	Variable, based on LME and European Duty Paid premium
	Apart from the Glencore Grundartangi Metal Agreement, the Southwire Metal Agreement and the Glencore Sweep
	Agreement (which expired at the end of 2013), we had the following forward delivery contractual commitments:
	Other forward delivery contracts
		March 31, 2014		December 31, 2013
		(in tonnes)
	Other forward delivery contracts – total	101,649		118,373
	Other forward delivery contracts – Glencore	23,692		20,008
	Other forward delivery contracts – fixed price	52		—
	We had no outstanding primary aluminum forward financial sales contracts at March 31, 2014. We had no fixed price forward financial contracts to purchase aluminum at March 31, 2014.
	Forward Financial Instruments
	We are party to various forward financial and physical delivery contracts, which are accounted for as derivative instruments. See Note 4 Derivative and hedging instruments for additional information about these instruments.

Supplemental_cash_flow_informa

Supplemental cash flow information	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental cash flow information	'
	Supplemental cash flow information
		Three months ended March 31,
		2014		2013
	Cash paid for:
	Interest	$	131	$	108
	Income/withholding taxes (1)	1,846		10,625
	Non-cash investing activities:
	Accrued capital costs	$	4,619	$	456
	-1	We paid withholding taxes in Iceland of $8,259 during the three months ended March 31, 2013. Our tax payments in Iceland for withholding taxes, income taxes and any associated refunds are denominated in Icelandic kronur ("ISK").

Asset_retirement_obligations_A

Asset retirement obligations (“ARO”)	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Asset retirement obligations (“ARO”)	'
	Asset retirement obligations ("ARO")
	Our asset retirement obligations consist primarily of costs associated with the disposal of spent pot liner used in the reduction cells of our domestic facilities.
	The reconciliation of the changes in the asset retirement obligations is presented below:
		Three months ended March 31, 2014			Year ended December 31, 2013
	Beginning balance, ARO liability	$	27,113		$	16,124
	Additional ARO liability incurred	794			1,730
	ARO liabilities settled	(791		)	(2,580		)
	Accretion expense	282			1,733
	Additional ARO liability from Sebree acquisition	—			10,106
	Ending balance, ARO liability	$	27,398		$	27,113
	Certain conditional AROs related to the disposal costs of fixed assets at our primary aluminum facilities have not been recorded because they have an indeterminate settlement date. These conditional AROs will be initially recognized in the period in which sufficient information exists to estimate their fair value.

Components_of_Accumulated_othe

Components of Accumulated other comprehensive loss	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Components of accumulated other comprehensive loss	'
	Components of accumulated other comprehensive loss
		March 31, 2014			December 31, 2013
	Defined benefit plan liabilities	$	(91,318	)	$	(92,177	)
	Equity in investee other comprehensive income (1)	(12,650		)	(12,650		)
	Unrealized loss on financial instruments	(1,111		)	(1,064		)
	Other comprehensive loss before income tax effect	(105,079		)	(105,891		)
	Income tax effect (2)	13,346			14,059
	Accumulated other comprehensive loss	$	(91,733	)	$	(91,832	)
	-1	The amount includes our equity in the other comprehensive income of Mt. Holly.
	(2)The allocation of the income tax effect to the components of other comprehensive income is as follows:
		31-Mar-14			31-Dec-13
	Defined benefit plan liabilities	$	13,552		$	14,256
	Equity in investee other comprehensive income	401			418
	Unrealized loss on financial instruments	(607		)	(615		)
	The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCI"):
		Defined benefit plan and other postretirement liabilities			Equity in investee other comprehensive income			Unrealized loss on financial instruments			Total, net of tax
	Balance, December 31, 2012	$	(137,441	)	$	(12,224	)	$	(1,527	)	$	(151,192	)
	Other comprehensive income (loss) before reclassifications	—			(17		)	—			(17		)
	Net amount reclassified to net loss	950			—			(38		)	912
	Balance, March 31, 2013	$	(136,491	)	$	(12,241	)	$	(1,565	)	$	(150,297	)
	Balance, December 31, 2013	$	(77,921	)	$	(12,232	)	$	(1,679	)	$	(91,832	)
	Other comprehensive income (loss) before reclassifications	—			(17		)	—			(17		)
	Net amount reclassified to net loss	155			—			(39		)	116
	Balance, March 31, 2014	$	(77,766	)	$	(12,249	)	$	(1,718	)	$	(91,733	)
	Reclassifications out of AOCI were included in the consolidated statements of operations as follows:
			For the three months ended March 31,
	AOCI Components	Location	2014			2013
	Defined benefit plan and other postretirement liabilities	Cost of goods sold	$	590		$	1,084
		Selling, general and administrative expenses	268			240
		Income tax expense	(703		)	(374		)
		Net of tax	$	155		$	950
	Equity in investee other comprehensive income	Cost of goods sold	$	—		$	—
		Income tax expense	(17		)	(17		)
		Net of tax	$	(17	)	$	(17	)
	Unrealized loss on financial instruments	Cost of goods sold	$	(47	)	$	(46	)
		Income tax expense	8			8
		Net of tax	$	(39	)	$	(38	)

Components_of_net_periodic_ben

Components of net periodic benefit cost	3 Months Ended
	Mar. 31, 2014
Components of net periodic benefit cost [Abstract]	'
Components of net periodic benefit cost	'
	Components of net periodic benefit cost
		Pension Benefits
		Three months ended March 31,
		2014			2013
	Service cost	$	1,587		$	680
	Interest cost	2,640			1,635
	Expected return on plan assets	(3,397		)	(1,720		)
	Amortization of prior service costs	9			32
	Amortization of net loss	787			849
	Net periodic benefit cost	$	1,626		$	1,476
		Other Postretirement Benefits ("OPEB")
		Three months ended March 31,
		2014			2013
	Service cost	$	677		$	493
	Interest cost	1,511			1,323
	Amortization of prior service cost	(961		)	(1,060		)
	Amortization of net loss	1,024			1,503
	Net periodic benefit cost	$	2,251		$	2,259
	Employer contributions
	During the three months ended March 31, 2014, we made contributions of approximately $549 to the qualified defined benefit plans we sponsor.

Condensed_consolidating_financ

Condensed consolidating financial information	3 Months Ended
	Mar. 31, 2014
Condensed Consolidating Financial Information [Abstract]	'
Condensed consolidating financial information	'
	Condensed consolidating financial information
	Our 7.5% Notes due 2014 are guaranteed by each of our material existing and future domestic subsidiaries, except for Nordural US LLC. The Guarantor Subsidiaries are 100% owned by Century Aluminum Company (the "Company"). All guarantees are full and unconditional; all guarantees are joint and several. These notes are not guaranteed by our foreign subsidiaries (such subsidiaries and Nordural US LLC, collectively the "Non-Guarantor Subsidiaries"). We allocate corporate expenses or income to our subsidiaries and charge interest on certain intercompany balances.
	The following summarized condensed consolidating balance sheets as of March 31, 2014 and December 31, 2013, condensed consolidating statements of comprehensive income (loss) for the three months ended March 31, 2014 and 2013 and the condensed consolidating statements of cash flows for the three months ended March 31, 2014 and 2013 present separate results for Century, the Guarantor Subsidiaries, the Non-Guarantor Subsidiaries, consolidating adjustments and total consolidated amounts.
	This summarized condensed consolidating financial information may not necessarily be indicative of the results of operations, financial position or cash flows had the Company, the Guarantor Subsidiaries or the Non-Guarantor Subsidiaries operated as independent entities.
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of March 31, 2014
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	Assets:
	Cash and cash equivalents	$	—		$	48,605		$	3,893		$	—		$	52,498
	Restricted cash	787			245			—			—			1,032
	Accounts receivable — net	45,193			426			—			—			45,619
	Due from affiliates	282,130			33,567			2,340,716			(2,600,282		)	56,131
	Inventories	168,081			85,390			—			(1,372		)	252,099
	Prepaid and other current assets	6,210			17,702			5,627			5,662			35,201
	Deferred taxes	—			13,614			—			—			13,614
	Total current assets	502,401			199,549			2,350,236			(2,595,992		)	456,194
	Investment in subsidiaries	55,558			—			(1,106,964		)	1,051,406			—
	Property, plant and equipment — net	344,755			894,052			1,523			(437		)	1,239,893
	Due from affiliates — less current portion	—			32,730			—			(32,730		)	—
	Other assets	21,372			35,375			32,052			1,969			90,768
	Total	$	924,086		$	1,161,706		$	1,276,847		$	(1,575,784	)	$	1,786,855
	Liabilities and shareholders’ equity:
	Accounts payable, trade	$	52,467		$	39,795		$	2,242		$	5,471		$	99,975
	Due to affiliates	2,025,679			115,888			—			(2,067,188		)	74,379
	Accrued and other current liabilities	18,486			25,833			8,548			(1,223		)	51,644
	Accrued employee benefits costs	6,589			—			1,840			—			8,429
	Industrial revenue bonds	7,815			—			—			—			7,815
	Total current liabilities	2,111,036			181,516			12,630			(2,062,940		)	242,242
	Senior notes payable	—			—			246,615			—			246,615
	Accrued pension benefit costs — less current portion	12,603			—			27,378			—			39,981
	Accrued postretirement benefit costs — less current portion	126,123			—			5,073			—			131,196
	Other liabilities/intercompany loan	58,196			544,554			2,035			(567,801		)	36,984
	Deferred taxes	—			106,721			—			—			106,721
	Total noncurrent liabilities	196,922			651,275			281,101			(567,801		)	561,497
	Shareholders’ equity:
	Series A Preferred stock	—			—			1			—			1
	Common stock	60			12			936			(72		)	936
	Additional paid-in capital	268,468			175,943			2,508,882			(444,411		)	2,508,882
	Treasury stock, at cost	—			—			(49,924		)	—			(49,924		)
	Accumulated other comprehensive loss	(92,217		)	(1,716		)	(91,733		)	93,933			(91,733		)
	Retained earnings (accumulated deficit)	(1,560,183		)	154,676			(1,385,046		)	1,405,507			(1,385,046		)
	Total shareholders’ equity	(1,383,872		)	328,915			983,116			1,054,957			983,116
	Total	$	924,086		$	1,161,706		$	1,276,847		$	(1,575,784	)	$	1,786,855
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of December 31, 2013
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	Assets:
	Cash and cash equivalents	$	—		$	37,977		$	46,111		$	—		$	84,088
	Restricted cash	787			910			—			—			1,697
	Accounts receivable — net	45,205			10,979			—			—			56,184
	Due from affiliates	303,031			36,995			2,304,874			(2,601,313		)	43,587
	Inventories	166,137			73,478			—			—			239,615
	Prepaid and other current assets	6,350			20,531			5,395			—			32,276
	Deferred taxes	—			14,540			—			(926		)	13,614
	Total current assets	521,510			195,410			2,356,380			(2,602,239		)	471,061
	Investment in subsidiaries	55,929			—			(1,087,216		)	1,031,287			—
	Property, plant and equipment — net	351,096			895,381			1,621			(437		)	1,247,661
	Due from affiliates — less current portion	—			32,066			—			(32,066		)	—
	Other assets	21,163			33,132			32,431			4,748			91,474
	Total	$	949,698		$	1,155,989		$	1,303,216		$	(1,598,707	)	$	1,810,196
	Liabilities and shareholders’ equity:
	Accounts payable, trade	$	65,384		$	42,351		$	755		$	—		$	108,490
	Due to affiliates	2,015,550			97,351			—			(2,059,319		)	53,582
Accrued and other current liabilities	25,419			26,005			16,486			1,556			69,466
Accrued employee benefits costs	12,880			—			2,737			(7,207		)	8,410
Industrial revenue bonds	7,815			—			—			—			7,815
Total current liabilities	2,127,048			165,707			19,978			(2,064,970		)	247,763
Senior notes payable	—			—			246,528			—			246,528
Accrued pension benefit costs — less current portion	6,183			—			26,458			7,207			39,848
Accrued postretirement benefit costs — less current portion	124,466			—			4,818			—			129,284
Other liabilities/intercompany loan	58,367			548,985			2,622			(572,231		)	37,743
Deferred taxes	—			106,218			—			—			106,218
Total noncurrent liabilities	189,016			655,203			280,426			(565,024		)	559,621
Shareholders’ equity:
Series A Preferred stock	—			—			1			—			1
Common stock	60			12			935			(72		)	935
Additional paid-in capital	268,467			179,493			2,508,574			(447,960		)	2,508,574
Treasury stock, at cost	—			—			(49,924		)	—			(49,924		)
Accumulated other comprehensive loss	(92,803		)	(1,678		)	(91,832		)	94,481			(91,832		)
Retained earnings (accumulated deficit)	(1,542,090		)	157,252			(1,364,942		)	1,384,838			(1,364,942		)
Total shareholders’ equity	(1,366,366		)	335,079			1,002,812			1,031,287			1,002,812
Total	$	949,698		$	1,155,989		$	1,303,216		$	(1,598,707	)	$	1,810,196
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the three months ended March 31, 2014
	Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
NET SALES:
Third-party customers	$	135,252		$	12		$	—		$	—		$	135,264
Related parties	164,040			121,543			—			—			285,583
	299,292			121,555			—			—			420,847
Cost of goods sold	312,624			109,981			—			—			422,605
Gross profit (loss)	(13,332		)	11,574			—			—			(1,758		)
Other operating expense – net	2,414			—			—			—			2,414
Selling, general and administrative expenses	9,371			691			—			—			10,062
Operating income (loss)	(25,117		)	10,883			—			—			(14,234		)
Interest expense – third party	(5,419		)	(58		)	—			—			(5,477		)
Interest expense – affiliates	12,461			(12,461		)	—			—			—
Interest income – third party	3			137			—			—			140
Net loss on forward and derivative contracts	(879		)	—			—			—			(879		)
Other expense – net	(220		)	(33		)	—			—			(253		)
Loss before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	(19,171		)	(1,532		)	—			—			(20,703		)
Income tax benefit (expense)	1,447			(544		)	—			191			1,094
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	(17,724		)	(2,076		)	—			191			(19,609		)
Equity in earnings (losses) of subsidiaries and joint ventures	(366		)	(495		)	(20,104		)	20,470			(495		)
Net income (loss)	$	(18,090	)	$	(2,571	)	$	(20,104	)	$	20,661		$	(20,104	)
Other comprehensive income (loss) before income tax effect	$	590		$	(47	)	$	812		$	(543	)	$	812
Income tax effect	(705		)	8			(713		)	697			(713		)
Other comprehensive income (loss)	(115		)	(39		)	99			154			99
Comprehensive income (loss)	$	(18,205	)	$	(2,610	)	$	(20,005	)	$	20,815		$	(20,005	)
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the three months ended March 31, 2013
	Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
NET SALES:
Third-party customers	$	137,098		$	51,416		$	—		$	—		$	188,514
Related parties	66,629			66,131			—			—			132,760
	203,727			117,547			—			—			321,274
Cost of goods sold	211,185			92,507			—			—			303,692
Gross profit (loss)	(7,458		)	25,040			—			—			17,582
Other operating expense – net	1,096			—			—			—			1,096
Selling, general and administrative expenses	12,889			3,410			—			—			16,299
Operating income (loss)	(21,443		)	21,630			—			—			187
Interest expense – third party	(6,076		)	—			—			—			(6,076		)
Interest expense – affiliates	14,496			(14,496		)	—			—			—
Interest income – third party	14			117			—			—			131
Net gain on forward and derivative contracts	15,507			—			—			—			15,507
Other income (expense) – net	119			(49		)	—			—			70
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	2,617			7,202			—			—			9,819
Income tax benefit (expense)	(7,102		)	4,585			—			—			(2,517		)
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	(4,485		)	11,787			—			—			7,302
Equity in earnings (losses) of subsidiaries and joint ventures	(2,222		)	951			8,253			(6,031		)	951
Net income (loss)	$	(6,707	)	$	12,738		$	8,253		$	(6,031	)	$	8,253
Other comprehensive income (loss) before income tax effect	$	1,084		$	(47	)	$	1,277		$	(1,037	)	$	1,277
Income tax effect	(391		)	9			(382		)	382			(382		)
Other comprehensive income (loss)	693			(38		)	895			(655		)	895
Comprehensive income (loss)	$	(6,014	)	$	12,700		$	9,148		$	(6,686	)	$	9,148
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
For the three months ended March 31, 2014
	Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Consolidated
Net cash provided by (used in) operating activities	$	(42,154	)	$	31,413		$	—		$	(10,741	)
Investing activities:
Purchase of property, plant and equipment	(2,525		)	(7,149		)	(26		)	(9,700		)
Nordural expansion — Helguvik	—			(93		)	—			(93		)
Purchase of carbon anode assets and improvements	—			(5,724		)	—			(5,724		)
Restricted and other cash deposits	—			665			—			665
Net cash used in investing activities	(2,525		)	(12,301		)	(26		)	(14,852		)
Financing activities:
Borrowings under revolving credit facilities	—			—			18,870			18,870
Repayments under revolving credit facilities	—			(6,000		)	(18,870		)	(24,870		)
Intercompany transactions	44,679			(2,484		)	(42,195		)	—
Issuance of common stock	—			—			3			3
Net cash provided by (used in) financing activities	44,679			(8,484		)	(42,192		)	(5,997		)
Change in cash and cash equivalents	—			10,628			(42,218		)	(31,590		)
Cash and cash equivalents, beginning of the period	—			37,977			46,111			84,088
Cash and cash equivalents, end of the period	$	—		$	48,605		$	3,893		$	52,498
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
For the three months ended March 31, 2013
	Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Consolidated
Net cash provided by (used in) operating activities	$	27,968		$	(5,567	)	$	—		$	22,401
Investing activities:
Purchase of property, plant and equipment	(1,723		)	(7,494		)	(147		)	(9,364		)
Nordural expansion — Helguvik	—			(1,745		)	—			(1,745		)
Purchase of carbon anode assets and improvements	—			(150		)	—			(150		)
Proceeds from sale of property, plant and equipment	—			353			—			353
Net cash used in investing activities	(1,723		)	(9,036		)	(147		)	(10,906		)
Financing activities:
Intercompany transactions	(26,245		)	26,247			(2		)	—
Net cash provided by (used in) financing activities	(26,245		)	26,247			(2		)	—
Change in cash and cash equivalents	—			11,644			(149		)	11,495
Cash and cash equivalents, beginning of the period	—			110,016			73,960			183,976
Cash and cash equivalents, end of the period	$	—		$	121,660		$	73,811		$	195,471

Subsequent_events

Subsequent events	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]	'
Subsequent events	'
	Subsequent events
	We have evaluated all subsequent events through the date the financial statements were issued and concluded that no subsequent events have occurred which require disclosure.

Acquisition_of_Sebree_aluminum1

Acquisition of Sebree aluminum smelter (Policies)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Purchase Price Allocation	'
	Purchase Price Allocation
	Allocating the purchase price to the acquired assets and liabilities involves management judgment. We allocated the purchase price to the assets acquired, liabilities assumed, and the bargain gain in accordance with Accounting Standards Codification ("ASC") 805 "Business Combinations."

Fair_value_measurements_Level_

Fair value measurements Level 3 Transfers (Policies)	3 Months Ended
	Mar. 31, 2014
Fair Value Level 3 Transfer Disclosure [Abstract]	'
Fair Value Level 3 Transfer Policy	'
	It is our policy to recognize transfers into and transfers out of Level 3 as of the actual date of the event or change in circumstances that caused the transfer.

Acquisition_of_Sebree_aluminum2

Acquisition of Sebree aluminum smelter (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Schedule of purchase price allocation	'
	The following table summarizes the fair value of the assets acquired and the liabilities assumed as of the acquisition date:
		Acquisition Date Estimated Fair Value as of March 31, 2014
	Consideration:
	Cash	$	48,083
	Deferred purchase price	1,910
	Assets Acquired:
	Inventories	59,018
	Prepaid and other current assets	2,273
	Property, plant and equipment – net	55,520
	Total assets acquired	$	116,811
	Liabilities Assumed:
	Accrued and other current liabilities	$	43,316
	Accrued pension benefit costs	996
	Accrued post retirement benefit costs	6,544
	Other liabilities	7,476
	Deferred taxes	3,233
	Total liabilities assumed	$	61,565
	Gain on bargain purchase:	$	5,253
Sebree acquisition, pro forma information	'
	The following unaudited pro forma financial information for the three months ended March 31, 2013 reflects our results of continuing operations as if the acquisition of Sebree had been completed on January 1, 2013. This unaudited pro forma financial information is provided for informational purposes only and is not necessarily indicative of what the actual results of operations would have been had the transactions taken place on January 1, 2013, nor is it indicative of the future consolidated results of operations or financial position of the combined companies.
		Three months ended March 31,
		2013
	Pro forma revenues	$	447,698
	Pro forma loss from continuing operations	(1,187		)
	Loss per common share, basic	(0.01		)
	Loss per common share, diluted	(0.01		)
	Our net income for the three months ended March 31, 2014 includes a non-recurring credit for the amortization of the deferred power contract liability of $5,534. As part of the Sebree acquisition, we recorded a $36,625 liability for an unfavorable power contract we assumed. The fair value measurement of the power contract was based on the difference between the forecasted contract rate and estimated market power rates through the contract termination date in January 2014. We amortized the power contract liability over the remaining period of the contract through January 31, 2014, resulting in a credit to our depreciation and amortization expense within cost of goods sold on the consolidated statement of operations for the three months ended March 31, 2014.

Fair_value_measurements_Tables

Fair value measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of valuation methodology for assets and liabilities at fair value	'
	The following section describes the valuation methodology used to measure our financial assets and liabilities that were accounted for at fair value and are categorized based on the fair value hierarchy described in ASC 820 "Fair Value Measurements and Disclosures."
	Overview of Century’s valuation methodology
		Level	Significant inputs
	Cash equivalents	1	Quoted market prices
	Trust assets (1)	1	Quoted market prices
	Surety bonds	1	Quoted market prices
	E.ON ("E.ON") contingent obligation	3	Quoted LME forward market, management’s estimates of the LME forward market prices for periods beyond the quoted periods and management’s estimate of future level of operations at Century Aluminum of Kentucky, our wholly owned subsidiary ("CAKY")
	Primary aluminum sales contract	3	Management’s estimates of future U.S. Midwest premium and risk-adjusted discount rates
	Midwest premium contracts	3	Management’s estimates of future U.S. Midwest premium
	-1	Trust assets are currently invested in money market funds. These trust assets are held to fund the non-qualified supplemental executive pension benefit obligations for certain of our officers. The trust has sole authority to invest the funds in secure interest producing investments consisting of short-term securities issued or guaranteed by the United States government or cash and cash equivalents.
Financial assets and liabilities at fair value on a recurring basis	'
	The following table sets forth our financial assets and liabilities that were accounted for at fair value on a recurring basis by the level of input within the ASC 820 fair value hierarchy.  As required by generally accepted accounting principles in the United States ("GAAP") for fair value measurements and disclosures, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and the placement within the fair value hierarchy levels. There were no transfers between Level 1 and 2 during the periods presented. There were no transfers into or out of Level 3 during the periods presented. It is our policy to recognize transfers into and transfers out of Level 3 as of the actual date of the event or change in circumstances that caused the transfer.
	Recurring Fair Value Measurements	As of March 31, 2014
		Level 1			Level 2			Level 3		Total
	ASSETS:
	Cash equivalents	$	40,939		$	—		$	—	$	40,939
	Trust assets	10,211			—			—		10,211
	Surety bonds	2,002			—			—		2,002
	TOTAL	$	53,152		$	—		$	—	$	53,152
	LIABILITIES:
	E.ON contingent obligation – net (1)	$	—		$	—		$	—	$	—
	TOTAL	$	—		$	—		$	—	$	—
	Recurring Fair Value Measurements	As of December 31, 2013
		Level 1			Level 2			Level 3		Total
	ASSETS:
	Cash equivalents	$	49,658		$	—		$	—	$	49,658
	Trust assets	11,151			—			—		11,151
	Surety bonds	2,002			—			—		2,002
	Midwest premium contracts	—			—			140		140
	TOTAL	$	62,811		$	—		$	140	$	62,951
	LIABILITIES:
	E.ON contingent obligation – net (1)	$	—		$	—		$	—	$	—
	Primary aluminum sales contract	—			—			140		140
	TOTAL	$	—		$	—		$	140	$	140
Change in level 3 fair value measurements	'
	Change in Level 3 Fair Value Measurements during the three months ended March 31,
		Derivative liabilities - net
		2014			2013
	Beginning balance, January 1	$	—		$	(16,539	)
	Total gain (loss) included in earnings	(940		)	15,509
	Settlements	940			—
	Ending balance, March 31,	$	—		$	(1,030	)
	Amount of gain (loss) included in earnings attributable to the change in unrealized losses relating to assets and liabilities held at March 31,	$	140		$	15,509

Derivative_and_hedging_instrum1

Derivative and hedging instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair value of derivative assets and liabilities by balance sheet location	'
	The following table provides the fair value and balance sheet classification of our derivatives:
	Fair Value of Derivative Assets and Liabilities
		Balance sheet location	March 31, 2014			December 31, 2013
	DERIVATIVE ASSETS:
	Midwest premium contracts	Prepaid and other current assets	$	—		$	140
	TOTAL		$	—		$	140
	DERIVATIVE LIABILITIES:
	Primary aluminum sales contract	Accrued and other current liabilities	$	—		$	140
	E.ON contingent obligation – net (1)	Other liabilities	—			—
	TOTAL		$	—		$	140
	-1	See Note 9 Debt for additional information about the E.ON contingent obligation.
Derivatives not designated as hedging instruments	'
	Derivatives not designated as hedging instruments:
		Gain (loss) recognized in income from derivatives
			Three months ended March 31,
		Location	2014			2013
	E.ON contingent obligation – net	Net gain (loss) on forward and derivative contracts	$	353		$	15,722
	Midwest premium contracts	Net gain (loss) on forward and derivative contracts	(1,080		)	—
	Primary aluminum sales contract	Related party sales	292			355
	Primary aluminum sales contract	Net gain (loss) on forward and derivative contracts	(152		)	(215		)
	E.ON contingent obligation – net	Interest expense – third party	(353		)	(353		)
Outstanding forward contracts not designated as hedging instruments	'
	We had the following outstanding forward contracts that were entered into that were not designated as hedging instruments:
		March 31, 2014		December 31, 2013
	Primary aluminum sales contract premium (tonnes) (1)	84		1,782
	Midwest premium contracts (tonnes)	—		6,000
	-1	Represents the remaining physical deliveries under the Glencore Metal Agreement.

Earnings_per_share_Tables

Earnings per share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Basic and diluted earnings (loss) per share	'
	The following table shows the basic and diluted earnings (loss) per share for the three months ended March 31, 2014 and 2013:
		For the three months ended March 31,
		2014							2013
		Loss			Shares (000)	Per-Share			Income			Shares (000)	Per-Share
	Net income (loss)	$	(20,104	)					$	8,253
	Amount allocated to common shareholders (1)	100		%					91.69		%
	Basic EPS:
	Income (loss) allocable to common shareholders	(20,104		)	88,717	$	(0.23	)	7,567			88,555	$	0.09
	Effect of Dilutive Securities:
	Share-based compensation plans	—			—				—			465
	Diluted EPS:
	Income (loss) applicable to common shareholders with assumed conversion	$	(20,104	)	88,717	$	(0.23	)	$	7,567		89,020	$	0.09
	-1	We have not allocated net losses between common and preferred shareholders, as the holders of our preferred shares do not have a contractual obligation to share in the loss.
Antidilutive securities excluded from the calculation of diluted EPS	'
	Antidilutive securities excluded from the calculation of diluted EPS:	Three months ended March 31,
		2014		2013
	Stock options (1)	603,032		347,934
	Service-based share awards (1)	442,456		—
	-1	In periods when we report a net loss, all share awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on earnings (loss) per share.

Shareholders_equity_Tables

Shareholders’ equity (Tables)	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity Note [Abstract]	'
Common and Preferred Stock Activity	'
	See Common and Preferred Stock Activity table below for additional information about preferred stock conversions during the period.
	Common and Preferred Stock Activity:	Preferred stock		Common stock
	(in shares)	Series A convertible		Treasury	Outstanding
	Beginning balance as of December 31, 2013	79,620		4,786,521	88,710,277
	Conversion of convertible preferred stock	(255	)	—	25,542
	Issuance for share-based compensation plans	—		—	35,624
	Ending balance as of March 31, 2014	79,365		4,786,521	88,771,443
	Beginning balance as of December 31, 2012	80,283		4,786,521	88,548,637
	Conversion of convertible preferred stock	(199	)	—	19,864
	Issuance for share-based compensation plans	—		—	27,708
	Ending balance as of March 31, 2013	80,084		4,786,521	88,596,209

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2014
Inventory, Net [Abstract]	'
Schedule of Inventories	'
	Inventories consist of the following:	March 31, 2014		December 31, 2013
	Raw materials	$	65,189	$	69,776
	Work-in-process	21,247		22,183
	Finished goods	33,589		17,661
	Operating and other supplies	132,074		129,995
	Inventories	$	252,099	$	239,615

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Schedule of Debt	'
		March 31, 2014			December 31, 2013
	Debt classified as current liabilities:
	Hancock County industrial revenue bonds ("IRBs") due 2028, interest payable quarterly (variable interest rates (not to exceed 12%)) (1)	$	7,815		$	7,815
	7.5% senior unsecured notes payable due August 15, 2014, interest payable semiannually (2)	2,603			2,603
	Iceland revolving credit facility (2)(3)	—			6,000
	Debt classified as non-current liabilities:
	7.5% senior secured notes payable due June 1, 2021, net of debt discount of $3,385 and $3,472, respectively, interest payable semiannually	246,615			246,528
	TOTAL	$	257,033		$	262,946
	-1	The IRBs are classified as current liabilities because they are remarketed weekly and could be required to be repaid upon demand if there is a failed remarketing. The IRB interest rate at March 31, 2014 was 0.26%.
	-2	These items are recorded in Accrued and other current liabilities based on the repayment terms and expected maturity.
	-3	Borrowings under the Iceland revolving credit facility bear variable interest based on LIBOR plus the applicable margin per annum. The interest rate at December 31, 2013 was 3.92%.
Schedule of Line of Credit Facilities	'
	Status of our Iceland revolving credit facility:
		March 31, 2014
	Credit Facility maximum amount	$	50,000
	Borrowing availability	50,000
	Outstanding borrowings	—
	Status of our U.S. revolving credit facility:
		March 31, 2014
	Credit facility maximum amount	$	150,000
	Borrowing availability, net of outstanding letters of credit	79,455
	Outstanding borrowings	—
	Letter of credit sub-facility amount	80,000
	Outstanding letters of credit issued	70,545
Offsetting of financial instruments and derivatives	'
	The following table provides information about the balance sheet location and gross amounts offset:
	Offsetting of financial instruments and derivatives
		Balance sheet location	31-Mar-14			31-Dec-13
	E.ON contingent obligation – principal	Other liabilities	$	(12,902	)	$	(12,902	)
	E.ON contingent obligation – accrued interest	Other liabilities	(4,231		)	(3,879		)
	E.ON contingent obligation – derivative asset	Other liabilities	17,133			16,781
			$	—		$	—

Forward_delivery_contracts_and1

Forward delivery contracts and financial instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Forward Delivery Contracts and Financial Instruments [Abstract]	'
Schedule of Forward Physical Delivery Agreements	'
	Forward Physical Delivery Agreements
	Primary Aluminum Sales Contracts
	Contract	Customer	Volume	Term	Pricing
	Glencore Grundartangi Metal Agreement (1)	Glencore	All primary aluminum produced at Grundartangi, net of tolling and other sales commitments	January 1, 2014 through December 31, 2017	Variable, based on LME and European Duty Paid premium
	Southwire Metal Agreement (2)	Southwire	216 million pounds per year (high conductivity molten aluminum)	January 1, 2014 through December 31, 2014	Variable, based on U.S. Midwest Transaction Price
	-1	The Glencore Grundartangi Metal Agreement is for all metal produced at Grundartangi from 2014 through 2017 less commitments under existing tolling and other sales contracts.  Grundartangi currently estimates that it will sell Glencore approximately 155,000 tonnes of aluminum under this agreement in 2014.
	-2	Southwire may, at its option, increase the volume purchased under the agreement by up to four percent by adjusting their monthly metal commitment.
	Tolling Contracts
	Contract	Customer	Volume	Term	Pricing
	Glencore Toll Agreement	Glencore	90,000 tonnes per year ("tpy")	Through July 2016	Variable, based on LME and European Duty Paid premium
	Glencore Toll Agreement	Glencore	49,000 tpy	Through December 31, 2014	Variable, based on LME and European Duty Paid premium
	Apart from the Glencore Grundartangi Metal Agreement, the Southwire Metal Agreement and the Glencore Sweep
	Agreement (which expired at the end of 2013), we had the following forward delivery contractual commitments:
	Other forward delivery contracts
		March 31, 2014		December 31, 2013
		(in tonnes)
	Other forward delivery contracts – total	101,649		118,373
	Other forward delivery contracts – Glencore	23,692		20,008
	Other forward delivery contracts – fixed price	52		—

Supplemental_cash_flow_informa1

Supplemental cash flow information (Tables)	3 Months Ended
	Mar. 31, 2014
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flow Information	'
		Three months ended March 31,
		2014		2013
	Cash paid for:
	Interest	$	131	$	108
	Income/withholding taxes (1)	1,846		10,625
	Non-cash investing activities:
	Accrued capital costs	$	4,619	$	456
	-1	We paid withholding taxes in Iceland of $8,259 during the three months ended March 31, 2013. Our tax payments in Iceland for withholding taxes, income taxes and any associated refunds are denominated in Icelandic kronur ("ISK").

Asset_retirement_obligations_A1

Asset retirement obligations (“ARO”) (Tables)	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligation Disclosure [Abstract]	'
Schedule of changes in asset retirement obligations	'
	The reconciliation of the changes in the asset retirement obligations is presented below:
		Three months ended March 31, 2014			Year ended December 31, 2013
	Beginning balance, ARO liability	$	27,113		$	16,124
	Additional ARO liability incurred	794			1,730
	ARO liabilities settled	(791		)	(2,580		)
	Accretion expense	282			1,733
	Additional ARO liability from Sebree acquisition	—			10,106
	Ending balance, ARO liability	$	27,398		$	27,113

Components_of_Accumulated_othe1

Components of Accumulated other comprehensive loss (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Components of Accumulated Other Comprehensive Loss	'
		March 31, 2014			December 31, 2013
	Defined benefit plan liabilities	$	(91,318	)	$	(92,177	)
	Equity in investee other comprehensive income (1)	(12,650		)	(12,650		)
	Unrealized loss on financial instruments	(1,111		)	(1,064		)
	Other comprehensive loss before income tax effect	(105,079		)	(105,891		)
	Income tax effect (2)	13,346			14,059
	Accumulated other comprehensive loss	$	(91,733	)	$	(91,832	)
	-1	The amount includes our equity in the other comprehensive income of Mt. Holly.
	(2)The allocation of the income tax effect to the components of other comprehensive income is as follows:
		31-Mar-14			31-Dec-13
	Defined benefit plan liabilities	$	13,552		$	14,256
	Equity in investee other comprehensive income	401			418
	Unrealized loss on financial instruments	(607		)	(615		)
Accumulated balances for each component of AOCI	'
	The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCI"):
		Defined benefit plan and other postretirement liabilities			Equity in investee other comprehensive income			Unrealized loss on financial instruments			Total, net of tax
	Balance, December 31, 2012	$	(137,441	)	$	(12,224	)	$	(1,527	)	$	(151,192	)
	Other comprehensive income (loss) before reclassifications	—			(17		)	—			(17		)
	Net amount reclassified to net loss	950			—			(38		)	912
	Balance, March 31, 2013	$	(136,491	)	$	(12,241	)	$	(1,565	)	$	(150,297	)
	Balance, December 31, 2013	$	(77,921	)	$	(12,232	)	$	(1,679	)	$	(91,832	)
	Other comprehensive income (loss) before reclassifications	—			(17		)	—			(17		)
	Net amount reclassified to net loss	155			—			(39		)	116
	Balance, March 31, 2014	$	(77,766	)	$	(12,249	)	$	(1,718	)	$	(91,733	)
Reclassification out of AOCI	'
	Reclassifications out of AOCI were included in the consolidated statements of operations as follows:
			For the three months ended March 31,
	AOCI Components	Location	2014			2013
	Defined benefit plan and other postretirement liabilities	Cost of goods sold	$	590		$	1,084
		Selling, general and administrative expenses	268			240
		Income tax expense	(703		)	(374		)
		Net of tax	$	155		$	950
	Equity in investee other comprehensive income	Cost of goods sold	$	—		$	—
		Income tax expense	(17		)	(17		)
		Net of tax	$	(17	)	$	(17	)
	Unrealized loss on financial instruments	Cost of goods sold	$	(47	)	$	(46	)
		Income tax expense	8			8
		Net of tax	$	(39	)	$	(38	)

Components_of_net_periodic_ben1

Components of net periodic benefit cost (Tables)	3 Months Ended
	Mar. 31, 2014
Components of net periodic benefit cost [Abstract]	'
Schedule of net periodic benefit cost	'
		Pension Benefits
		Three months ended March 31,
		2014			2013
	Service cost	$	1,587		$	680
	Interest cost	2,640			1,635
	Expected return on plan assets	(3,397		)	(1,720		)
	Amortization of prior service costs	9			32
	Amortization of net loss	787			849
	Net periodic benefit cost	$	1,626		$	1,476
		Other Postretirement Benefits ("OPEB")
		Three months ended March 31,
		2014			2013
	Service cost	$	677		$	493
	Interest cost	1,511			1,323
	Amortization of prior service cost	(961		)	(1,060		)
	Amortization of net loss	1,024			1,503
	Net periodic benefit cost	$	2,251		$	2,259

Condensed_consolidating_financ1

Condensed consolidating financial information (Tables)	3 Months Ended
	Mar. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Consolidating Balance Sheet	'
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of March 31, 2014
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	Assets:
	Cash and cash equivalents	$	—		$	48,605		$	3,893		$	—		$	52,498
	Restricted cash	787			245			—			—			1,032
	Accounts receivable — net	45,193			426			—			—			45,619
	Due from affiliates	282,130			33,567			2,340,716			(2,600,282		)	56,131
	Inventories	168,081			85,390			—			(1,372		)	252,099
	Prepaid and other current assets	6,210			17,702			5,627			5,662			35,201
	Deferred taxes	—			13,614			—			—			13,614
	Total current assets	502,401			199,549			2,350,236			(2,595,992		)	456,194
	Investment in subsidiaries	55,558			—			(1,106,964		)	1,051,406			—
	Property, plant and equipment — net	344,755			894,052			1,523			(437		)	1,239,893
	Due from affiliates — less current portion	—			32,730			—			(32,730		)	—
	Other assets	21,372			35,375			32,052			1,969			90,768
	Total	$	924,086		$	1,161,706		$	1,276,847		$	(1,575,784	)	$	1,786,855
	Liabilities and shareholders’ equity:
	Accounts payable, trade	$	52,467		$	39,795		$	2,242		$	5,471		$	99,975
	Due to affiliates	2,025,679			115,888			—			(2,067,188		)	74,379
	Accrued and other current liabilities	18,486			25,833			8,548			(1,223		)	51,644
	Accrued employee benefits costs	6,589			—			1,840			—			8,429
	Industrial revenue bonds	7,815			—			—			—			7,815
	Total current liabilities	2,111,036			181,516			12,630			(2,062,940		)	242,242
	Senior notes payable	—			—			246,615			—			246,615
	Accrued pension benefit costs — less current portion	12,603			—			27,378			—			39,981
	Accrued postretirement benefit costs — less current portion	126,123			—			5,073			—			131,196
	Other liabilities/intercompany loan	58,196			544,554			2,035			(567,801		)	36,984
	Deferred taxes	—			106,721			—			—			106,721
	Total noncurrent liabilities	196,922			651,275			281,101			(567,801		)	561,497
	Shareholders’ equity:
	Series A Preferred stock	—			—			1			—			1
	Common stock	60			12			936			(72		)	936
	Additional paid-in capital	268,468			175,943			2,508,882			(444,411		)	2,508,882
	Treasury stock, at cost	—			—			(49,924		)	—			(49,924		)
	Accumulated other comprehensive loss	(92,217		)	(1,716		)	(91,733		)	93,933			(91,733		)
	Retained earnings (accumulated deficit)	(1,560,183		)	154,676			(1,385,046		)	1,405,507			(1,385,046		)
	Total shareholders’ equity	(1,383,872		)	328,915			983,116			1,054,957			983,116
	Total	$	924,086		$	1,161,706		$	1,276,847		$	(1,575,784	)	$	1,786,855
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of December 31, 2013
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	Assets:
	Cash and cash equivalents	$	—		$	37,977		$	46,111		$	—		$	84,088
	Restricted cash	787			910			—			—			1,697
	Accounts receivable — net	45,205			10,979			—			—			56,184
	Due from affiliates	303,031			36,995			2,304,874			(2,601,313		)	43,587
	Inventories	166,137			73,478			—			—			239,615
	Prepaid and other current assets	6,350			20,531			5,395			—			32,276
	Deferred taxes	—			14,540			—			(926		)	13,614
	Total current assets	521,510			195,410			2,356,380			(2,602,239		)	471,061
	Investment in subsidiaries	55,929			—			(1,087,216		)	1,031,287			—
	Property, plant and equipment — net	351,096			895,381			1,621			(437		)	1,247,661
	Due from affiliates — less current portion	—			32,066			—			(32,066		)	—
	Other assets	21,163			33,132			32,431			4,748			91,474
	Total	$	949,698		$	1,155,989		$	1,303,216		$	(1,598,707	)	$	1,810,196
	Liabilities and shareholders’ equity:
	Accounts payable, trade	$	65,384		$	42,351		$	755		$	—		$	108,490
	Due to affiliates	2,015,550			97,351			—			(2,059,319		)	53,582
	Accrued and other current liabilities	25,419			26,005			16,486			1,556			69,466
	Accrued employee benefits costs	12,880			—			2,737			(7,207		)	8,410
	Industrial revenue bonds	7,815			—			—			—			7,815
	Total current liabilities	2,127,048			165,707			19,978			(2,064,970		)	247,763
Senior notes payable	—			—			246,528			—			246,528
Accrued pension benefit costs — less current portion	6,183			—			26,458			7,207			39,848
Accrued postretirement benefit costs — less current portion	124,466			—			4,818			—			129,284
Other liabilities/intercompany loan	58,367			548,985			2,622			(572,231		)	37,743
Deferred taxes	—			106,218			—			—			106,218
Total noncurrent liabilities	189,016			655,203			280,426			(565,024		)	559,621
Shareholders’ equity:
Series A Preferred stock	—			—			1			—			1
Common stock	60			12			935			(72		)	935
Additional paid-in capital	268,467			179,493			2,508,574			(447,960		)	2,508,574
Treasury stock, at cost	—			—			(49,924		)	—			(49,924		)
Accumulated other comprehensive loss	(92,803		)	(1,678		)	(91,832		)	94,481			(91,832		)
Retained earnings (accumulated deficit)	(1,542,090		)	157,252			(1,364,942		)	1,384,838			(1,364,942		)
Total shareholders’ equity	(1,366,366		)	335,079			1,002,812			1,031,287			1,002,812
Total	$	949,698		$	1,155,989		$	1,303,216		$	(1,598,707	)	$	1,810,196
Condensed Consolidating Statements of Comprehensive Income (Loss)	'
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
	For the three months ended March 31, 2014
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	NET SALES:
	Third-party customers	$	135,252		$	12		$	—		$	—		$	135,264
	Related parties	164,040			121,543			—			—			285,583
		299,292			121,555			—			—			420,847
	Cost of goods sold	312,624			109,981			—			—			422,605
	Gross profit (loss)	(13,332		)	11,574			—			—			(1,758		)
	Other operating expense – net	2,414			—			—			—			2,414
	Selling, general and administrative expenses	9,371			691			—			—			10,062
	Operating income (loss)	(25,117		)	10,883			—			—			(14,234		)
	Interest expense – third party	(5,419		)	(58		)	—			—			(5,477		)
	Interest expense – affiliates	12,461			(12,461		)	—			—			—
	Interest income – third party	3			137			—			—			140
	Net loss on forward and derivative contracts	(879		)	—			—			—			(879		)
	Other expense – net	(220		)	(33		)	—			—			(253		)
	Loss before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	(19,171		)	(1,532		)	—			—			(20,703		)
	Income tax benefit (expense)	1,447			(544		)	—			191			1,094
	Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	(17,724		)	(2,076		)	—			191			(19,609		)
	Equity in earnings (losses) of subsidiaries and joint ventures	(366		)	(495		)	(20,104		)	20,470			(495		)
	Net income (loss)	$	(18,090	)	$	(2,571	)	$	(20,104	)	$	20,661		$	(20,104	)
	Other comprehensive income (loss) before income tax effect	$	590		$	(47	)	$	812		$	(543	)	$	812
	Income tax effect	(705		)	8			(713		)	697			(713		)
	Other comprehensive income (loss)	(115		)	(39		)	99			154			99
	Comprehensive income (loss)	$	(18,205	)	$	(2,610	)	$	(20,005	)	$	20,815		$	(20,005	)
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
	For the three months ended March 31, 2013
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Reclassifications and Eliminations			Consolidated
	NET SALES:
	Third-party customers	$	137,098		$	51,416		$	—		$	—		$	188,514
	Related parties	66,629			66,131			—			—			132,760
		203,727			117,547			—			—			321,274
	Cost of goods sold	211,185			92,507			—			—			303,692
	Gross profit (loss)	(7,458		)	25,040			—			—			17,582
	Other operating expense – net	1,096			—			—			—			1,096
	Selling, general and administrative expenses	12,889			3,410			—			—			16,299
	Operating income (loss)	(21,443		)	21,630			—			—			187
	Interest expense – third party	(6,076		)	—			—			—			(6,076		)
	Interest expense – affiliates	14,496			(14,496		)	—			—			—
	Interest income – third party	14			117			—			—			131
	Net gain on forward and derivative contracts	15,507			—			—			—			15,507
	Other income (expense) – net	119			(49		)	—			—			70
	Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	2,617			7,202			—			—			9,819
	Income tax benefit (expense)	(7,102		)	4,585			—			—			(2,517		)
	Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	(4,485		)	11,787			—			—			7,302
	Equity in earnings (losses) of subsidiaries and joint ventures	(2,222		)	951			8,253			(6,031		)	951
	Net income (loss)	$	(6,707	)	$	12,738		$	8,253		$	(6,031	)	$	8,253
	Other comprehensive income (loss) before income tax effect	$	1,084		$	(47	)	$	1,277		$	(1,037	)	$	1,277
	Income tax effect	(391		)	9			(382		)	382			(382		)
	Other comprehensive income (loss)	693			(38		)	895			(655		)	895
	Comprehensive income (loss)	$	(6,014	)	$	12,700		$	9,148		$	(6,686	)	$	9,148
Condensed Consolidating Statement of Cash Flows	'
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	For the three months ended March 31, 2013
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Consolidated
	Net cash provided by (used in) operating activities	$	27,968		$	(5,567	)	$	—		$	22,401
	Investing activities:
	Purchase of property, plant and equipment	(1,723		)	(7,494		)	(147		)	(9,364		)
	Nordural expansion — Helguvik	—			(1,745		)	—			(1,745		)
	Purchase of carbon anode assets and improvements	—			(150		)	—			(150		)
	Proceeds from sale of property, plant and equipment	—			353			—			353
	Net cash used in investing activities	(1,723		)	(9,036		)	(147		)	(10,906		)
	Financing activities:
	Intercompany transactions	(26,245		)	26,247			(2		)	—
	Net cash provided by (used in) financing activities	(26,245		)	26,247			(2		)	—
	Change in cash and cash equivalents	—			11,644			(149		)	11,495
	Cash and cash equivalents, beginning of the period	—			110,016			73,960			183,976
	Cash and cash equivalents, end of the period	$	—		$	121,660		$	73,811		$	195,471
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	For the three months ended March 31, 2014
		Combined Guarantor Subsidiaries			Combined Non-Guarantor Subsidiaries			The Company			Consolidated
	Net cash provided by (used in) operating activities	$	(42,154	)	$	31,413		$	—		$	(10,741	)
	Investing activities:
	Purchase of property, plant and equipment	(2,525		)	(7,149		)	(26		)	(9,700		)
	Nordural expansion — Helguvik	—			(93		)	—			(93		)
	Purchase of carbon anode assets and improvements	—			(5,724		)	—			(5,724		)
	Restricted and other cash deposits	—			665			—			665
	Net cash used in investing activities	(2,525		)	(12,301		)	(26		)	(14,852		)
	Financing activities:
	Borrowings under revolving credit facilities	—			—			18,870			18,870
	Repayments under revolving credit facilities	—			(6,000		)	(18,870		)	(24,870		)
	Intercompany transactions	44,679			(2,484		)	(42,195		)	—
	Issuance of common stock	—			—			3			3
	Net cash provided by (used in) financing activities	44,679			(8,484		)	(42,192		)	(5,997		)
	Change in cash and cash equivalents	—			10,628			(42,218		)	(31,590		)
	Cash and cash equivalents, beginning of the period	—			37,977			46,111			84,088
	Cash and cash equivalents, end of the period	$	—		$	48,605		$	3,893		$	52,498

Acquisition_of_Sebree_aluminum3

Acquisition of Sebree aluminum smelter (Employee Headcount) (Details) (Sebree Smelter [Member])	Jun. 01, 2013
Sebree Smelter [Member]	'
Business Acquisition [Line Items]	'
Sebree employees	500

Acquisition_of_Sebree_aluminum4

Acquisition of Sebree aluminum smelter (Details) (USD $)	3 Months Ended		10 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Jun. 01, 2013
				t
Business Acquisition [Line Items]	'	'	'	'
Sebree power contract amortization	($5,534)	$0	'	'
Sebree Smelter [Member]	'	'	'	'
Business Acquisition [Line Items]	'	'	'	'
Sebree primary aluminum capacity (tonnes)	'	'	'	205,000
Purchase price for acquisition	'	'	'	61,000
Purchase price cash paid	'	'	48,000	'
Gain on bargain purchase	'	'	5,253	'
Cash	'	'	48,083	'
Deferred purchase price	'	'	1,910	'
Inventories	59,018	'	59,018	'
Prepaid and other current assets	2,273	'	2,273	'
Property, plant and equipment – net	55,520	'	55,520	'
Total assets acquired	116,811	'	116,811	'
Accrued and other current liabilities	43,316	'	43,316	'
Accrued pension benefit costs	996	'	996	'
Accrued post retirement benefit costs	6,544	'	6,544	'
Other liabilities	7,476	'	7,476	'
Deferred taxes	3,233	'	3,233	'
Total liabilities assumed	61,565	'	61,565	'
Sebree power contract amortization	5,534	'	'	'
Power contract liability assumed	'	'	'	36,625
Pro forma revenues	'	447,698	'	'
Pro forma loss from continuing operations	'	($1,187)	'	'
Loss per common share, basic	'	($0.01)	'	'
Loss per common share, diluted	'	($0.01)	'	'

Fair_value_measurements_Detail

Fair value measurements (Details) (USD $)

3 Months Ended

In Thousands, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Derivative Liabilities - Net [Member]

Derivative Liabilities - Net [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

ASSETS:

'

'

'

'

'

'

'

'

'

'

Cash equivalents

'

'

$40,939

$49,658

$40,939

$49,658

$0

$0

$0

$0

Trust assets

'

'

10,211

11,151

10,211

11,151

0

0

0

0

Surety bonds

'

'

2,002

2,002

2,002

2,002

0

0

0

0

Midwest premium contracts

'

'

'

140

'

0

'

0

'

140

TOTAL

'

'

53,152

62,951

53,152

62,811

0

0

0

140

LIABILITIES:

'

'

'

'

'

'

'

'

'

'

E.ON contingent obligation – net (1)

'

'

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

Primary aluminum sales contract

'

'

'

140

'

0

'

0

'

140

TOTAL

'

'

0

140

0

0

0

0

0

140

Level 3 fair value measurements [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Beginning balance, January 1,

0

-16,539

'

'

'

'

'

'

'

'

Total gain (loss) included in earnings

-940

15,509

'

'

'

'

'

'

'

'

Settlements

940

0

'

'

'

'

'

'

'

'

Ending balance, March 31,

0

-1,030

'

'

'

'

'

'

'

'

Amount of gain (loss) included in earnings attributable to the change in unrealized losses relating to assets and liabilities held at March 31,

$140

$15,509

'

'

'

'

'

'

'

'

[1]

See Note 9 Debt for additional information about the E.ON contingent obligation.

Derivative_and_hedging_instrum2

Derivative and hedging instruments (Details) (Not Designated as Hedging Instrument [Member], USD $)	Mar. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Fair value of derivative assets and liabilities by balance sheet location [Abstract]	'		'
DERIVATIVE ASSETS	$0		$140
DERIVATIVE LIABILITIES	0		140
Midwest Premium Contracts [Member]	'		'
Outstanding forward contracts not designated as hedging instruments [Abstract]	'		'
Midwest premium contracts (tonnes)	0		6,000
Midwest Premium Contracts [Member] | Prepaid and Other Current Assets [Member]	'		'
Fair value of derivative assets and liabilities by balance sheet location [Abstract]	'		'
DERIVATIVE ASSETS	0		140
Primary Aluminum Sales Contracts [Member] | Accrued and Other Current Liabilities [Member]	'		'
Fair value of derivative assets and liabilities by balance sheet location [Abstract]	'		'
DERIVATIVE LIABILITIES	0		140
E.ON Contingent Obligation - Net [Member] | Other Liabilities [Member]	'		'
Fair value of derivative assets and liabilities by balance sheet location [Abstract]	'		'
DERIVATIVE LIABILITIES	$0	[1]	$0	[1]
Primary Aluminum Sales Contract Premium [Member]	'		'
Outstanding forward contracts not designated as hedging instruments [Abstract]	'		'
Primary aluminum sales contract premium (tonnes) (1)	84	[2]	1,782	[2]
[1]	See Note 9 Debt for additional information about the E.ON contingent obligation.
[2]	Represents the remaining physical deliveries under the Glencore Metal Agreement.

Derivative_and_hedging_instrum3

Derivative and hedging instruments Part 2 (Details) (Not Designated as Hedging Instrument [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Primary Aluminum Sales Contracts [Member] | Net Gain (Loss) on Forward and Derivative Contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (loss) recognized in income from derivatives	($152)	($215)
Primary Aluminum Sales Contracts [Member] | Related Party Sales [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (loss) recognized in income from derivatives	292	355
E.ON Contingent Obligation - Net [Member] | Net Gain (Loss) on Forward and Derivative Contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (loss) recognized in income from derivatives	353	15,722
E.ON Contingent Obligation - Net [Member] | Interest Expense - Third Party [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (loss) recognized in income from derivatives	-353	-353
Midwest Premium Contracts [Member] | Net Gain (Loss) on Forward and Derivative Contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Gain (loss) recognized in income from derivatives	($1,080)	$0

Earnings_per_share_Details

Earnings per share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share [Abstract]	'		'
Net income (loss)	($20,104)		$8,253
Amount allocated to common shareholders (in hundredths)	100.00%	[1]	91.69%	[1]
Basic EPS:	'		'
Income (loss) allocable to common shareholders	-20,104		7,567
Income (loss) allocable to common shareholders - (in Shares)	88,717,000		88,555,000
Earnings Per Share, Basic	($0.23)		$0.09
Effect of Dilutive Securities:	'		'
Share-based compensation plans	0		0
Share-based compensation plans - (in Shares)	0		465,000
Diluted EPS:	'		'
Income (loss) applicable to common shareholders with assumed conversion	($20,104)		$7,567
Income (loss) applicable to common shareholders with assumed conversion - (in Shares)	88,717,000		89,020,000
Earnings Per Share, Diluted	($0.23)		$0.09
Stock Options [Member]	'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Antidilutive securities excluded from calculation of diluted EPS (in shares)	603,032	[2]	347,934	[2]
Service-based share awards [Member]	'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Antidilutive securities excluded from calculation of diluted EPS (in shares)	442,456	[2]	0	[2]
[1]	We have not allocated net losses between common and preferred shareholders, as the holders of our preferred shares do not have a contractual obligation to share in the loss.
[2]	In periods when we report a net loss, all share awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on earnings (loss) per share.

Shareholders_equity_Details

Shareholders’ equity (Details) (USD $)	1 Months Ended	3 Months Ended	32 Months Ended		3 Months Ended
In Thousands, except Share data, unless otherwise specified	Aug. 31, 2011	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
					Series A Convertible Preferred Stock [Member]	Series A Convertible Preferred Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Common Stock [Member]	Common Stock [Member]
Class of Stock [Line Items]	'	'	'	'	'	'	'	'	'	'
Common stock, shares authorized (in shares)	'	195,000,000	195,000,000	195,000,000	'	'	'	'	'	'
Stock repurchase program, authorized amount	$60,000	'	'	'	'	'	'	'	'	'
Repurchase of common stock (in shares)	'	'	4,786,521	'	'	'	'	'	'	'
Repurchase of common stock, aggregate purchase price	'	'	49,924	'	'	'	'	'	'	'
Stock repurchase program, remaining authorized repurchase amount	'	$10,076	'	'	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'	'	'	'
Shares, Beginning balance	'	'	'	'	79,620	80,283	4,786,521	4,786,521	88,710,277	88,548,637
Conversion of convertible preferred stock (in shares)	'	'	'	'	-255	-199	0	0	25,542	19,864
Issuance for stock compensation plans (in shares)	'	'	'	'	0	0	0	0	35,624	27,708
Shares, Ending balance	'	'	'	'	79,365	80,084	4,786,521	4,786,521	88,771,443	88,596,209

Income_taxes_Details

Income taxes (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Income tax benefit (expense)	$1,094	($2,517)

Inventories_Details

Inventories (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Inventory, Net [Abstract]	'	'
Raw materials	$65,189	$69,776
Work-in-process	21,247	22,183
Finished goods	33,589	17,661
Operating and other supplies	132,074	129,995
Inventories	$252,099	$239,615

Debt_Details

Debt (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Schedule of Debt Instruments [Line Items]	'		'
Industrial revenue bonds	$7,815		$7,815
TOTAL	257,033		262,946
Industrial revenue bonds due 2028 [Member] | Short-term Debt [Member]	'		'
Schedule of Debt Instruments [Line Items]	'		'
Debt Instrument, Unamortized Discount	0	[1]	0	[1]
Debt Instrument, Maturity Date	1-Apr-28	[1]	1-Apr-28	[1]
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	12.00%	[1]	12.00%	[1]
Industrial revenue bonds	7,815	[1]	7,815	[1]
Debt Instrument, Interest Rate, Stated Percentage	0.26%		'
Senior unsecured notes due August 15, 2014 [Member]	'		'
Schedule of Debt Instruments [Line Items]	'		'
Debt Instrument, Interest Rate, Stated Percentage	7.50%		'
Senior unsecured notes due August 15, 2014 [Member] | Short-term Debt [Member]	'		'
Schedule of Debt Instruments [Line Items]	'		'
Debt Instrument, Unamortized Discount	0		0
Debt Instrument, Maturity Date	15-Aug-14		15-Aug-14
Current portion of long-term debt	2,603	[2]	2,603	[2]
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%
Iceland revolving line of credit [Member] | Short-term Debt [Member]	'		'
Schedule of Debt Instruments [Line Items]	'		'
Revolving credit facility	0	[2],[3]	6,000	[2],[3]
Debt Instrument, Interest Rate, Stated Percentage	'		3.92%
Senior secured notes due June 01, 2021 [Member] | Long-term Debt [Member]	'		'
Schedule of Debt Instruments [Line Items]	'		'
Debt Instrument, Unamortized Discount	3,385		3,472
Debt Instrument, Maturity Date	1-Jun-21		1-Jun-21
Secured Long-term Debt, Noncurrent	$246,615		$246,528
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%
[1]	The IRBs are classified as current liabilities because they are remarketed weekly and could be required to be repaid upon demand if there is a failed remarketing. The IRB interest rate at March 31, 2014 was 0.26%.
[2]	These items are recorded in Accrued and other current liabilities based on the repayment terms and expected maturity.
[3]	Borrowings under the Iceland revolving credit facility bear variable interest based on LIBOR plus the applicable margin per annum. The interest rate at December 31, 2013 was 3.92%.

Debt_Credit_Facility_Details

Debt Credit Facility (Details) (USD $)	3 Months Ended		3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014		Dec. 31, 2013
	U.S. revolving credit facility [Member]	U.S. letter of credit [Member]	Iceland revolving line of credit [Member]	Short-term Debt [Member]		Short-term Debt [Member]
	Long-term Debt [Member]	Long-term Debt [Member]	Long-term Debt [Member]	Iceland revolving line of credit [Member]		Iceland revolving line of credit [Member]
Line of Credit Facility [Line Items]	'	'	'	'		'
Credit facility term	'5 years	'	'3 years	'		'
Credit facility maximum amount	$150,000	'	$50,000	'		'
Borrowing availability	79,455	'	50,000	'		'
Outstanding borrowings	0	'	0	0	[1],[2]	6,000	[1],[2]
Letter of credit sub-facility amount	'	80,000	'	'		'
Outstanding letters of credit issued	'	$70,545	'	'		'
[1]	Borrowings under the Iceland revolving credit facility bear variable interest based on LIBOR plus the applicable margin per annum. The interest rate at December 31, 2013 was 3.92%.
[2]	These items are recorded in Accrued and other current liabilities based on the repayment terms and expected maturity.

Debt_75_Notes_Details

Debt 7.5% Notes (Details) (Long-term Debt [Member], Senior secured notes due June 01, 2021 [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2014	Jun. 04, 2013
Long-term Debt [Member] | Senior secured notes due June 01, 2021 [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Debt Instrument, Face Amount	'	'	$250,000
Proceeds from Issuance of Debt	$246,330	'	'
Debt Instrument, Interest Rate, Stated Percentage	7.50%	7.50%	'

Debt_EON_Contingent_Obligation

Debt E.ON Contingent Obligation (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
			E.ON contingent obligation [Member]	E.ON contingent obligation [Member]	Other Liabilities [Member]	Other Liabilities [Member]
					E.ON contingent obligation [Member]	E.ON contingent obligation [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'
Unrealized gain (loss) on E.ON obligation	$353	$15,722	'	'	'	'
E.ON contingent obligation – principal	'	'	'	'	-12,902	-12,902
E.ON contingent obligation – accrued interest	'	'	'	'	-4,231	-3,879
E.ON contingent obligation – derivative asset	'	'	'	'	17,133	16,781
E.ON contingent obligation	'	'	$0	$0	'	'

Commitments_and_contingencies_

Commitments and contingencies (Details) (USD $)	3 Months Ended	153 Months Ended				1 Months Ended		12 Months Ended	45 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Apr. 30, 2010	Dec. 31, 2013	Apr. 30, 2013	Mar. 31, 2014	Dec. 31, 2016
				MW		Logan Kruger [Member]	Grundartangi Power Agreement [Member]	PBGC Agreement [Member]	PBGC Forecast [Member]
									PBGC Agreement [Member]
Environmental Contingencies [Abstract]	'	'	'	'	'	'	'	'	'
Environmental-related accrued liabilities	$1,113	$1,113	$999	'	'	'	'	'	'
Environmental remediation expense minimum amount entitling reimbursement by third party	400	'	'	'	'	'	'	'	'
Environmental remediation expense for Hydrocarbon Recovery Plan	'	1,033	'	'	'	'	'	'	'
Legal Contingencies [Abstract]	'	'	'	'	'	'	'	'	'
Damages sought for breach of contract and wrongful termination	'	'	'	'	'	20,000	'	'	'
Legal settlement award payment	'	'	'	'	'	8,700	1,470	'	'
Legal settlement expense	'	'	'	'	'	8,400	'	'	'
PBCG Settlement [Abstract]	'	'	'	'	'	'	'	'	'
Pension contributions above required minimum, total	'	'	'	'	'	'	'	'	17,400
Pension contributions	'	'	'	'	'	'	'	6,700	'
OR Power Agreement [Abstract]	'	'	'	'	'	'	'	'	'
Power currently available under the power purchase agreement (in megawatts)	'	'	'	47.5	'	'	'	'	'
Power prepayments	$2,000	$2,000	'	'	'	'	'	'	'
Labor Commitments [Abstract]	'	'	'	'	'	'	'	'	'
Percentage of U.S. based work force represented by a union (in hundredths)	73.00%	73.00%	'	'	'	'	'	'	'
Number of labor unions Grundartangi subsidiary entered into a new labor agreement with	'	'	'	'	5	'	'	'	'
Percentage of Grundartangi work force represented by the labor unions (in hundredths)	82.00%	82.00%	'	'	'	'	'	'	'
Percentage of Vlissingen work force represented by the labor union (in hundredths)	77.00%	77.00%	'	'	'	'	'	'	'

Forward_delivery_contracts_and2

Forward delivery contracts and financial instruments (Details)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2014		Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
	Primary Aluminum Sales Contracts [Member]		Primary Aluminum Sales Contracts [Member]		Long-Term Tolling Conctracts [Member]	Long-Term Tolling Conctracts [Member]	Other Forward Delivery Contracts [Member]	Other Forward Delivery Contracts [Member]	Glencore [Member]	Glencore [Member]
	Glencore Nordural Metal Agreement [Member]		Southwire Metal Agreement [Member]		Glencore Toll Agreement 1 [Member]	Glencore Toll Agreement 2 [Member]	t	t	Other Forward Delivery Contracts [Member]	Other Forward Delivery Contracts [Member]
	t		lb		t	t			t	t
Supply Commitment [Line Items]	'		'		'	'	'	'	'	'
Customer	'Glencore	[1]	'Southwire	[2]	'Glencore	'Glencore	'	'	'	'
Volume	'All primary aluminum produced at Grundartangi, net of tolling and other sales commitments	[1]	'216 million pounds per year (high conductivity molten aluminum)	[2]	'90,000 tonnes per year ("tpy")	'49,000 tpy	'	'	'	'
Volume (in tpy and lbs per year)	155,000		216,000,000		90,000	49,000	'	'	'	'
Volume adjustment (in percent)	'		4.00%		'	'	'	'	'	'
Term	'January 1, 2014 through December 31, 2017	[1]	'January 1, 2014 through December 31, 2014	[2]	'Through July 2016	'Through December 31, 2014	'	'	'	'
Pricing	'Variable, based on LME and European Duty Paid premium	[1]	'Variable, based on U.S. Midwest Transaction Price	[2]	'Variable, based on LME and European Duty Paid premium	'Variable, based on LME and European Duty Paid premium	'	'	'	'
Other forward delivery contracts to sell primary aluminum (in tonnes)	'		'		'	'	101,649	118,373	23,692	20,008
Other forward delivery contracts to sell primary aluminum at fixed price (in tonnes)	'		'		'	'	52	0	'	'
[1]	The Glencore Grundartangi Metal Agreement is for all metal produced at Grundartangi from 2014 through 2017 less commitments under existing tolling and other sales contracts. Grundartangi currently estimates that it will sell Glencore approximately 155,000 tonnes of aluminum under this agreement in 2014.
[2]	Southwire may, at its option, increase the volume purchased under the agreement by up to four percent by adjusting their monthly metal commitment.

Supplemental_cash_flow_informa2

Supplemental cash flow information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest	$131	$108
Income/withholding taxes (1)	1,846	10,625
Accrued capital costs	4,619	456
Iceland [Member]	'	'
Income/withholding taxes (1)	'	$8,259

Asset_retirement_obligations_A2

Asset retirement obligations (“ARO”) (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Asset Retirement Obligation [Roll Forward]	'	'
Beginning balance, ARO liability	$27,113	$16,124
Additional ARO liability incurred	794	1,730
ARO liabilities settled	-791	-2,580
Accretion expense	282	1,733
Additional ARO liability from Sebree acquisition	0	10,106
Ending balance, ARO liability	$27,398	$27,113

Components_of_Accumulated_othe2

Components of Accumulated other comprehensive loss (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Other comprehensive loss before income tax effect	($105,079)	'	($105,891)	'
Income tax effect	13,346	'	14,059	'
Accumulated other comprehensive loss	-91,733	-150,297	-91,832	-151,192
Other comprehensive income (loss) before reclassifications	-17	-17	'	'
Net amount reclassified to net loss	116	912	'	'
Cost of goods sold	422,605	303,692	'	'
Selling, general and administrative expenses	10,062	16,299	'	'
Income tax benefit (expense)	-1,094	2,517	'	'
Net of tax	-20,104	8,253	'	'
Defined benefit plans liabilities [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Other comprehensive loss before income tax effect	-91,318	'	-92,177	'
Income tax effect	13,552	'	14,256	'
Accumulated other comprehensive loss	-77,766	-136,491	-77,921	-137,441
Other comprehensive income (loss) before reclassifications	0	0	'	'
Net amount reclassified to net loss	155	950	'	'
Equity in investee other comprehensive income [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Other comprehensive loss before income tax effect	-12,650	'	-12,650	'
Income tax effect	401	'	418	'
Accumulated other comprehensive loss	-12,249	-12,241	-12,232	-12,224
Other comprehensive income (loss) before reclassifications	-17	-17	'	'
Net amount reclassified to net loss	0	0	'	'
Unrealized loss on financial instruments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Other comprehensive loss before income tax effect	-1,111	'	-1,064	'
Income tax effect	-607	'	-615	'
Accumulated other comprehensive loss	-1,718	-1,565	-1,679	-1,527
Other comprehensive income (loss) before reclassifications	0	0	'	'
Net amount reclassified to net loss	-39	-38	'	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined benefit plans liabilities [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Cost of goods sold	590	1,084	'	'
Selling, general and administrative expenses	268	240	'	'
Income tax benefit (expense)	-703	-374	'	'
Net of tax	155	950	'	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Equity in investee other comprehensive income [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Cost of goods sold	0	0	'	'
Income tax benefit (expense)	-17	-17	'	'
Net of tax	-17	-17	'	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized loss on financial instruments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Cost of goods sold	-47	-46	'	'
Income tax benefit (expense)	8	8	'	'
Net of tax	($39)	($38)	'	'

Components_of_net_periodic_ben2

Components of net periodic benefit cost (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Employer contributions	$549	'
Pension Benefits [Member]	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Service cost	1,587	680
Interest cost	2,640	1,635
Expected return on plan assets	-3,397	-1,720
Amortization of prior service costs	9	32
Amortization of net loss	787	849
Net periodic benefit cost	1,626	1,476
Other Postretirement Benefits [Member]	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Service cost	677	493
Interest cost	1,511	1,323
Amortization of prior service costs	-961	-1,060
Amortization of net loss	1,024	1,503
Net periodic benefit cost	$2,251	$2,259

Condensed_consolidating_financ2

Condensed consolidating financial information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Guarantor Obligations [Line Items]	'	'	'	'
Percentage of subsidiary guarantor owned by company (in hundredths)	100.00%	'	'	'
Assets:	'	'	'	'
Cash and cash equivalents	$52,498	$195,471	'	'
Restricted cash	1,032	'	1,697	'
Accounts receivable — net	45,619	'	56,184	'
Due from affiliates	56,131	'	43,587	'
Inventories	252,099	'	239,615	'
Prepaid and other current assets	35,201	'	32,276	'
Deferred taxes	13,614	'	13,614	'
Total current assets	456,194	'	471,061	'
Investment in subsidiaries	0	'	0	'
Property, plant and equipment — net	1,239,893	'	1,247,661	'
Due from affiliates — less current portion	0	'	0	'
Other assets	90,768	'	91,474	'
TOTAL	1,786,855	'	1,810,196	'
Liabilities and shareholders' equity:	'	'	'	'
Accounts payable, trade	99,975	'	108,490	'
Due to affiliates	74,379	'	53,582	'
Accrued and other current liabilities	51,644	'	69,466	'
Accrued employee benefits costs	8,429	'	8,410	'
Industrial revenue bonds	7,815	'	7,815	'
Total current liabilities	242,242	'	247,763	'
Senior notes payable	246,615	'	246,528	'
Accrued pension benefit costs — less current portion	39,981	'	39,848	'
Accrued postretirement benefits costs — less current portion	131,196	'	129,284	'
Other liabilities/intercompany loan	36,984	'	37,743	'
Deferred taxes	106,721	'	106,218	'
Total noncurrent liabilities	561,497	'	559,621	'
Shareholders' equity:	'	'	'	'
Series A Preferred stock	1	'	1	'
Common stock	936	'	935	'
Additional paid-in capital	2,508,882	'	2,508,574	'
Treasury stock, at cost	-49,924	'	-49,924	'
Accumulated other comprehensive loss	-91,733	-150,297	-91,832	-151,192
Retained earnings (accumulated deficit)	-1,385,046	'	-1,364,942	'
Total shareholders’ equity	983,116	'	1,002,812	'
Total	1,786,855	'	1,810,196	'
Net sales:	'	'	'	'
Third-party customers	135,264	188,514	'	'
Related parties	285,583	132,760	'	'
Sales Revenue – net	420,847	321,274	'	'
Cost of goods sold	422,605	303,692	'	'
Gross profit (loss)	-1,758	17,582	'	'
Other operating expense – net	2,414	1,096	'	'
Selling, general and administrative expenses	10,062	16,299	'	'
Operating income (loss)	-14,234	187	'	'
Interest expense – third party	-5,477	-6,076	'	'
Interest expense – affiliates	0	0	'	'
Interest income – third party	140	131	'	'
Net loss on forward and derivative contracts	-879	15,507	'	'
Other income (expense) – net	-253	70	'	'
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	-20,703	9,819	'	'
Income tax benefit (expense)	1,094	-2,517	'	'
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	-19,609	7,302	'	'
Equity in earnings (losses) of subsidiaries and joint ventures	-495	951	'	'
Net income (loss)	-20,104	8,253	'	'
Other comprehensive income before income tax effect	812	1,277	'	'
Income tax effect	-713	-382	'	'
Other comprehensive income (loss)	99	895	'	'
Comprehensive income (loss)	-20,005	9,148	'	'
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS	'	'	'	'
Net cash provided by (used in) operating activities	-10,741	22,401	'	'
Purchase of property, plant and equipment	-9,700	-9,364	'	'
Nordural expansion — Helguvik	-93	-1,745	'	'
Purchase of carbon anode assets and improvements	-5,724	-150	'	'
Proceeds from sale of property, plant and equipment	0	353	'	'
Restricted and other cash deposits	665	0	'	'
Net cash used in investing activities	-14,852	-10,906	'	'
Financing activities:	'	'	'	'
Borrowings under revolving credit facilities	18,870	0	'	'
Repayments under revolving credit facilities	-24,870	0	'	'
Intercompany transactions	0	0	'	'
Issuance of common stock	3	0	'	'
Net cash provided by (used in) financing activities	-5,997	0	'	'
Change in cash and cash equivalents	-31,590	11,495	'	'
Cash and cash equivalents, beginning of period	84,088	183,976	'	'
Cash and cash equivalents, end of period	52,498	195,471	'	'
Senior unsecured notes due August 15, 2014 [Member]	'	'	'	'
Guarantor Obligations [Line Items]	'	'	'	'
Interest rate (in hundredths)	7.50%	'	'	'
Combined Guarantor Subsidiaries [Member]	'	'	'	'
Assets:	'	'	'	'
Cash and cash equivalents	0	0	'	'
Restricted cash	787	'	787	'
Accounts receivable — net	45,193	'	45,205	'
Due from affiliates	282,130	'	303,031	'
Inventories	168,081	'	166,137	'
Prepaid and other current assets	6,210	'	6,350	'
Deferred taxes	0	'	0	'
Total current assets	502,401	'	521,510	'
Investment in subsidiaries	55,558	'	55,929	'
Property, plant and equipment — net	344,755	'	351,096	'
Due from affiliates — less current portion	0	'	0	'
Other assets	21,372	'	21,163	'
TOTAL	924,086	'	949,698	'
Liabilities and shareholders' equity:	'	'	'	'
Accounts payable, trade	52,467	'	65,384	'
Due to affiliates	2,025,679	'	2,015,550	'
Accrued and other current liabilities	18,486	'	25,419	'
Accrued employee benefits costs	6,589	'	12,880	'
Industrial revenue bonds	7,815	'	7,815	'
Total current liabilities	2,111,036	'	2,127,048	'
Senior notes payable	0	'	0	'
Accrued pension benefit costs — less current portion	12,603	'	6,183	'
Accrued postretirement benefits costs — less current portion	126,123	'	124,466	'
Other liabilities/intercompany loan	58,196	'	58,367	'
Deferred taxes	0	'	0	'
Total noncurrent liabilities	196,922	'	189,016	'
Shareholders' equity:	'	'	'	'
Series A Preferred stock	0	'	0	'
Common stock	60	'	60	'
Additional paid-in capital	268,468	'	268,467	'
Treasury stock, at cost	0	'	0	'
Accumulated other comprehensive loss	-92,217	'	-92,803	'
Retained earnings (accumulated deficit)	-1,560,183	'	-1,542,090	'
Total shareholders’ equity	-1,383,872	'	-1,366,366	'
Total	924,086	'	949,698	'
Net sales:	'	'	'	'
Third-party customers	135,252	137,098	'	'
Related parties	164,040	66,629	'	'
Sales Revenue – net	299,292	203,727	'	'
Cost of goods sold	312,624	211,185	'	'
Gross profit (loss)	-13,332	-7,458	'	'
Other operating expense – net	2,414	1,096	'	'
Selling, general and administrative expenses	9,371	12,889	'	'
Operating income (loss)	-25,117	-21,443	'	'
Interest expense – third party	-5,419	-6,076	'	'
Interest expense – affiliates	12,461	14,496	'	'
Interest income – third party	3	14	'	'
Net loss on forward and derivative contracts	-879	15,507	'	'
Other income (expense) – net	-220	119	'	'
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	-19,171	2,617	'	'
Income tax benefit (expense)	1,447	-7,102	'	'
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	-17,724	-4,485	'	'
Equity in earnings (losses) of subsidiaries and joint ventures	-366	-2,222	'	'
Net income (loss)	-18,090	-6,707	'	'
Other comprehensive income before income tax effect	590	1,084	'	'
Income tax effect	-705	-391	'	'
Other comprehensive income (loss)	-115	693	'	'
Comprehensive income (loss)	-18,205	-6,014	'	'
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS	'	'	'	'
Net cash provided by (used in) operating activities	-42,154	27,968	'	'
Purchase of property, plant and equipment	-2,525	-1,723	'	'
Nordural expansion — Helguvik	0	0	'	'
Purchase of carbon anode assets and improvements	0	0	'	'
Proceeds from sale of property, plant and equipment	'	0	'	'
Restricted and other cash deposits	0	'	'	'
Net cash used in investing activities	-2,525	-1,723	'	'
Financing activities:	'	'	'	'
Borrowings under revolving credit facilities	0	'	'	'
Repayments under revolving credit facilities	0	'	'	'
Intercompany transactions	44,679	-26,245	'	'
Issuance of common stock	0	'	'	'
Net cash provided by (used in) financing activities	44,679	-26,245	'	'
Change in cash and cash equivalents	0	0	'	'
Cash and cash equivalents, beginning of period	0	0	'	'
Cash and cash equivalents, end of period	0	0	'	'
Combined Non-Guarantor Subsidiaries [Member]	'	'	'	'
Assets:	'	'	'	'
Cash and cash equivalents	48,605	121,660	'	'
Restricted cash	245	'	910	'
Accounts receivable — net	426	'	10,979	'
Due from affiliates	33,567	'	36,995	'
Inventories	85,390	'	73,478	'
Prepaid and other current assets	17,702	'	20,531	'
Deferred taxes	13,614	'	14,540	'
Total current assets	199,549	'	195,410	'
Investment in subsidiaries	0	'	0	'
Property, plant and equipment — net	894,052	'	895,381	'
Due from affiliates — less current portion	32,730	'	32,066	'
Other assets	35,375	'	33,132	'
TOTAL	1,161,706	'	1,155,989	'
Liabilities and shareholders' equity:	'	'	'	'
Accounts payable, trade	39,795	'	42,351	'
Due to affiliates	115,888	'	97,351	'
Accrued and other current liabilities	25,833	'	26,005	'
Accrued employee benefits costs	0	'	0	'
Industrial revenue bonds	0	'	0	'
Total current liabilities	181,516	'	165,707	'
Senior notes payable	0	'	0	'
Accrued pension benefit costs — less current portion	0	'	0	'
Accrued postretirement benefits costs — less current portion	0	'	0	'
Other liabilities/intercompany loan	544,554	'	548,985	'
Deferred taxes	106,721	'	106,218	'
Total noncurrent liabilities	651,275	'	655,203	'
Shareholders' equity:	'	'	'	'
Series A Preferred stock	0	'	0	'
Common stock	12	'	12	'
Additional paid-in capital	175,943	'	179,493	'
Treasury stock, at cost	0	'	0	'
Accumulated other comprehensive loss	-1,716	'	-1,678	'
Retained earnings (accumulated deficit)	154,676	'	157,252	'
Total shareholders’ equity	328,915	'	335,079	'
Total	1,161,706	'	1,155,989	'
Net sales:	'	'	'	'
Third-party customers	12	51,416	'	'
Related parties	121,543	66,131	'	'
Sales Revenue – net	121,555	117,547	'	'
Cost of goods sold	109,981	92,507	'	'
Gross profit (loss)	11,574	25,040	'	'
Other operating expense – net	0	0	'	'
Selling, general and administrative expenses	691	3,410	'	'
Operating income (loss)	10,883	21,630	'	'
Interest expense – third party	-58	0	'	'
Interest expense – affiliates	-12,461	-14,496	'	'
Interest income – third party	137	117	'	'
Net loss on forward and derivative contracts	0	0	'	'
Other income (expense) – net	-33	-49	'	'
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	-1,532	7,202	'	'
Income tax benefit (expense)	-544	4,585	'	'
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	-2,076	11,787	'	'
Equity in earnings (losses) of subsidiaries and joint ventures	-495	951	'	'
Net income (loss)	-2,571	12,738	'	'
Other comprehensive income before income tax effect	-47	-47	'	'
Income tax effect	8	9	'	'
Other comprehensive income (loss)	-39	-38	'	'
Comprehensive income (loss)	-2,610	12,700	'	'
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS	'	'	'	'
Net cash provided by (used in) operating activities	31,413	-5,567	'	'
Purchase of property, plant and equipment	-7,149	-7,494	'	'
Nordural expansion — Helguvik	-93	-1,745	'	'
Purchase of carbon anode assets and improvements	-5,724	-150	'	'
Proceeds from sale of property, plant and equipment	'	353	'	'
Restricted and other cash deposits	665	'	'	'
Net cash used in investing activities	-12,301	-9,036	'	'
Financing activities:	'	'	'	'
Borrowings under revolving credit facilities	0	'	'	'
Repayments under revolving credit facilities	-6,000	'	'	'
Intercompany transactions	-2,484	26,247	'	'
Issuance of common stock	0	'	'	'
Net cash provided by (used in) financing activities	-8,484	26,247	'	'
Change in cash and cash equivalents	10,628	11,644	'	'
Cash and cash equivalents, beginning of period	37,977	110,016	'	'
Cash and cash equivalents, end of period	48,605	121,660	'	'
The Company [Member]	'	'	'	'
Assets:	'	'	'	'
Cash and cash equivalents	3,893	73,811	'	'
Restricted cash	0	'	0	'
Accounts receivable — net	0	'	0	'
Due from affiliates	2,340,716	'	2,304,874	'
Inventories	0	'	0	'
Prepaid and other current assets	5,627	'	5,395	'
Deferred taxes	0	'	0	'
Total current assets	2,350,236	'	2,356,380	'
Investment in subsidiaries	-1,106,964	'	-1,087,216	'
Property, plant and equipment — net	1,523	'	1,621	'
Due from affiliates — less current portion	0	'	0	'
Other assets	32,052	'	32,431	'
TOTAL	1,276,847	'	1,303,216	'
Liabilities and shareholders' equity:	'	'	'	'
Accounts payable, trade	2,242	'	755	'
Due to affiliates	0	'	0	'
Accrued and other current liabilities	8,548	'	16,486	'
Accrued employee benefits costs	1,840	'	2,737	'
Industrial revenue bonds	0	'	0	'
Total current liabilities	12,630	'	19,978	'
Senior notes payable	246,615	'	246,528	'
Accrued pension benefit costs — less current portion	27,378	'	26,458	'
Accrued postretirement benefits costs — less current portion	5,073	'	4,818	'
Other liabilities/intercompany loan	2,035	'	2,622	'
Deferred taxes	0	'	0	'
Total noncurrent liabilities	281,101	'	280,426	'
Shareholders' equity:	'	'	'	'
Series A Preferred stock	1	'	1	'
Common stock	936	'	935	'
Additional paid-in capital	2,508,882	'	2,508,574	'
Treasury stock, at cost	-49,924	'	-49,924	'
Accumulated other comprehensive loss	-91,733	'	-91,832	'
Retained earnings (accumulated deficit)	-1,385,046	'	-1,364,942	'
Total shareholders’ equity	983,116	'	1,002,812	'
Total	1,276,847	'	1,303,216	'
Net sales:	'	'	'	'
Third-party customers	0	0	'	'
Related parties	0	0	'	'
Sales Revenue – net	0	0	'	'
Cost of goods sold	0	0	'	'
Gross profit (loss)	0	0	'	'
Other operating expense – net	0	0	'	'
Selling, general and administrative expenses	0	0	'	'
Operating income (loss)	0	0	'	'
Interest expense – third party	0	0	'	'
Interest expense – affiliates	0	0	'	'
Interest income – third party	0	0	'	'
Net loss on forward and derivative contracts	0	0	'	'
Other income (expense) – net	0	0	'	'
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	0	0	'	'
Income tax benefit (expense)	0	0	'	'
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	0	0	'	'
Equity in earnings (losses) of subsidiaries and joint ventures	-20,104	8,253	'	'
Net income (loss)	-20,104	8,253	'	'
Other comprehensive income before income tax effect	812	1,277	'	'
Income tax effect	-713	-382	'	'
Other comprehensive income (loss)	99	895	'	'
Comprehensive income (loss)	-20,005	9,148	'	'
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS	'	'	'	'
Net cash provided by (used in) operating activities	0	0	'	'
Purchase of property, plant and equipment	-26	-147	'	'
Nordural expansion — Helguvik	0	0	'	'
Purchase of carbon anode assets and improvements	0	0	'	'
Proceeds from sale of property, plant and equipment	'	0	'	'
Restricted and other cash deposits	0	'	'	'
Net cash used in investing activities	-26	-147	'	'
Financing activities:	'	'	'	'
Borrowings under revolving credit facilities	18,870	'	'	'
Repayments under revolving credit facilities	-18,870	'	'	'
Intercompany transactions	-42,195	-2	'	'
Issuance of common stock	3	'	'	'
Net cash provided by (used in) financing activities	-42,192	-2	'	'
Change in cash and cash equivalents	-42,218	-149	'	'
Cash and cash equivalents, beginning of period	46,111	73,960	'	'
Cash and cash equivalents, end of period	3,893	73,811	'	'
Reclassifications and Eliminations [Member]	'	'	'	'
Assets:	'	'	'	'
Cash and cash equivalents	0	'	'	'
Restricted cash	0	'	0	'
Accounts receivable — net	0	'	0	'
Due from affiliates	-2,600,282	'	-2,601,313	'
Inventories	-1,372	'	0	'
Prepaid and other current assets	5,662	'	0	'
Deferred taxes	0	'	-926	'
Total current assets	-2,595,992	'	-2,602,239	'
Investment in subsidiaries	1,051,406	'	1,031,287	'
Property, plant and equipment — net	-437	'	-437	'
Due from affiliates — less current portion	-32,730	'	-32,066	'
Other assets	1,969	'	4,748	'
TOTAL	-1,575,784	'	-1,598,707	'
Liabilities and shareholders' equity:	'	'	'	'
Accounts payable, trade	5,471	'	0	'
Due to affiliates	-2,067,188	'	-2,059,319	'
Accrued and other current liabilities	-1,223	'	1,556	'
Accrued employee benefits costs	0	'	-7,207	'
Industrial revenue bonds	0	'	0	'
Total current liabilities	-2,062,940	'	-2,064,970	'
Senior notes payable	0	'	0	'
Accrued pension benefit costs — less current portion	0	'	7,207	'
Accrued postretirement benefits costs — less current portion	0	'	0	'
Other liabilities/intercompany loan	-567,801	'	-572,231	'
Deferred taxes	0	'	0	'
Total noncurrent liabilities	-567,801	'	-565,024	'
Shareholders' equity:	'	'	'	'
Series A Preferred stock	0	'	0	'
Common stock	-72	'	-72	'
Additional paid-in capital	-444,411	'	-447,960	'
Treasury stock, at cost	0	'	0	'
Accumulated other comprehensive loss	93,933	'	94,481	'
Retained earnings (accumulated deficit)	1,405,507	'	1,384,838	'
Total shareholders’ equity	1,054,957	'	1,031,287	'
Total	-1,575,784	'	-1,598,707	'
Net sales:	'	'	'	'
Third-party customers	0	0	'	'
Related parties	0	0	'	'
Sales Revenue – net	0	0	'	'
Cost of goods sold	0	0	'	'
Gross profit (loss)	0	0	'	'
Other operating expense – net	0	0	'	'
Selling, general and administrative expenses	0	0	'	'
Operating income (loss)	0	0	'	'
Interest expense – third party	0	0	'	'
Interest expense – affiliates	0	0	'	'
Interest income – third party	0	0	'	'
Net loss on forward and derivative contracts	0	0	'	'
Other income (expense) – net	0	0	'	'
Income before income taxes and equity in earnings (losses) of subsidiaries and joint ventures	0	0	'	'
Income tax benefit (expense)	191	0	'	'
Income (loss) before equity in earnings (losses) of subsidiaries and joint ventures	191	0	'	'
Equity in earnings (losses) of subsidiaries and joint ventures	20,470	-6,031	'	'
Net income (loss)	20,661	-6,031	'	'
Other comprehensive income before income tax effect	-543	-1,037	'	'
Income tax effect	697	382	'	'
Other comprehensive income (loss)	154	-655	'	'
Comprehensive income (loss)	20,815	-6,686	'	'
Financing activities:	'	'	'	'
Cash and cash equivalents, beginning of period	0	'	'	'
Cash and cash equivalents, end of period	$0	'	'	'