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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
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