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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ (40,313) $ (35,610) $ 11,325
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Unrealized net loss (gain) on forward contracts (1,170) 2,987 (750)
Gain on bargain purchase (5,253) 0 0
Unrealized gain on E.ON contingent obligation (16,781) 0 0
Accrued and other plant curtailment costs — net 4,452 5,251 (13,928)
Lower of cost or market inventory adjustment 1,247 (19,818) 19,766
Depreciation 66,570 62,570 62,194
Sebree power contract amortization (31,031) 0 0
Debt discount amortization 672 1,069 1,857
Pension and other postretirement benefits 1,740 3,129 (28,757)
Stock-based compensation 1,078 613 2,856
Loss on early extinguishment of debt 3,272 0 763
Equity in earnings of joint ventures, net of dividends 871 (2,623) (3,445)
Change in operating assets and liabilities:      
Accounts receivable — net (6,001) (2,537) (3,744)
Due from affiliates (5,717) 2,202 10,694
Inventories (21,740) 31,854 (35,819)
Prepaid and other current assets 5,318 4,946 (20,791)
Accounts payable, trade 25,224 (12,114) (904)
Due to affiliates 13,845 (2,167) (3,477)
Accrued and other current liabilities 5,834 (5,746) 425
Other — net 17,601 3,133 (1,201)
Net cash provided by (used in) operating activities 19,718 37,139 (2,936)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of property, plant and equipment (46,533) (17,677) (20,100)
Nordural expansion — Helguvik (3,331) (7,317) (12,882)
Purchase of carbon anode assets and improvements (18,213) (13,814) 0
Purchase of Sebree smelter (48,058) 0 0
Investments in and advances to joint ventures (125) (275) (113)
Payments received from joint ventures 0 6,622 3,056
Proceeds from sale of property, plant and equipment 525 188 1,471
Restricted and other cash deposits (1,439) (258) 3,673
Net cash used in investing activities (117,174) (32,531) (24,895)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Repayment of debt (249,604) 0 (47,067)
Proceeds from issuance of debt 246,330 0 0
Repayment of contingent obligation 0 0 (189)
Borrowings under revolving credit facility 22,725 18,076 15,900
Repayments under revolving credit facility (16,725) (18,076) (15,900)
Debt issuance costs (3,994) 0 0
Debt retirement costs (1,208) 0 0
Intercompany transactions 0 0 0
Repurchase of common stock 0 (4,033) (45,891)
Issuance of common stock 44 0 83
Net cash used in financing activities (2,432) (4,033) (93,064)
CHANGE IN CASH AND CASH EQUIVALENTS (99,888) 575 (120,895)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR 183,976 183,401 304,296
CASH AND CASH EQUIVALENTS, END OF YEAR $ 84,088 $ 183,976 $ 183,401