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Composition of certain balance sheet accounts at December 31 (Tables) | 12 Months Ended
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Dec. 31, 2011
Regulation SX Balance Sheet Disclosures [Abstract] |
Composition of certain balance sheet accounts |
Components of Prepaid and other current assets: |  | 2011 |  |  | 2010 |
Income/withholding tax receivable – current |  | $ | 18,559 |  |  | $ | 95 |
Prepaid and other assets |  |  | 14,209 |  |  |  | 10,774 |
Derivative assets |  |  | 3,998 |  |  |  | 2,864 |
VAT receivable |  |  | 3,880 |  |  |  | 4,559 |
|  | $ | 40,646 |  |  | $ | 18,292 |
Components of Other assets: |  | 2011 |  |  | 2010 |
Investment in Mt. Holly and joint ventures |  | $ | 40,922 |  |  | $ | 37,570 |
Maintenance and operating supplies – non-current |  |  | 17,887 |  |  |  | 17,986 |
Cash surrender value of life insurance policies |  |  | 16,286 |  |  |  | 14,365 |
Rabbi trust assets |  |  | 14,616 |  |  |  | - |
Income tax receivables – non-current |  |  | 12,103 |  |  |  | 9,127 |
Capitalized financing fees |  |  | 2,735 |  |  |  | 3,906 |
|  | $ | 104,549 |  |  | $ | 82,954 |
Components of Accrued and other current liabilities: |  | 2011 |  |  | 2010 |
Other accrued and current liabilities |  | $ | 18,838 |  |  | $ | 20,510 |
Income taxes payable |  |  | 13,370 |  |  |  | 11,201 |
Accrued vacation pay |  |  | 5,922 |  |  |  | 5,259 |
Accrued bond interest |  |  | 2,560 |  |  |  | 2,903 |
Accrued curtailment expenses |  |  | 86 |  |  |  | 1,622 |
|  | $ | 40,776 |  |  | $ | 41,495 |
Components of Other liabilities: |  | 2011 |  |  | 2010 |
E.ON contingent liability and accrued interest |  | $ | 13,958 |  |  | $ | 13,091 |
Asset retirement obligations – non-current |  |  | 13,887 |  |  |  | 13,059 |
Accrued workers' compensation cost – non-current |  |  | 7,210 |  |  |  | 6,985 |
Other liabilities |  |  | 4,950 |  |  |  | 4,477 |
|  | $ | 40,005 |  |  | $ | 37,612 |
Components of Accumulated Other Comprehensive Loss: |  | 2011 |  |  | 2010 |
Unrealized loss on financial instruments |  | $ | (1,040 | ) |  | $ | (415 | )
Defined benefit plan liabilities |  |  | (142,259 | ) |  |  | (64,296 | )
Equity in investee other comprehensive income (1) |  |  | (8,476 | ) |  |  | (8,223 | )
Other comprehensive loss before income tax effect |  |  | (151,775 | ) |  |  | (72,934 | )
Income tax effect |  |  | 17,187 |  |  |  | 22,958 |
Accumulated other comprehensive loss |  | $ | (134,588 | ) |  | $ | (49,976 | )
(1) | The amount includes our equity in the other comprehensive income of Mt. Holly Aluminum Company.

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- Definition Tabular disclosure of the carrying value as of the balance sheet date of certain balance sheet accounts, including prepaid and other current assets, accrued and other current liabilities and accumulated other comprehensive loss.. + References No definition available. + Details
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