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Acquisition of Sebree aluminum smelter (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 01, 2013 T
Business Acquisition [Line Items] |  |  |  |  |  |  |
Gain on bargain purchase |  | $ 2,042 | $ 0 | $ 2,042 | $ 0 |  |
Sebree Smelter [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Sebree Primary Aluminum Capacity |  |  |  |  |  | 205,000 |
Purchase price for the acquisition |  |  |  |  |  | 61,000 |
Purchase price cash paid |  |  |  |  |  | 48,000 |
Target working capital amount |  |  |  |  |  | 71,000 |
Gain on bargain purchase |  |  |  | 2,042 |  |  |
Cash (1) |  |  |  |  |  | 47,373 | [1]
Inventories |  |  |  |  |  | 58,496 |
Prepaid and other current assets |  |  |  |  |  | 363 |
Property, plant and equipment - net |  |  |  |  |  | 55,520 |
Total assets acquired |  |  |  |  |  | 114,379 |
Accrued and other current liabilities |  |  |  |  |  | 44,121 |
Accrued pension benefit costs |  |  |  |  |  | 5,039 |
Accrued post retirement benefit costs |  |  |  |  |  | 6,544 |
Other liabilities |  |  |  |  |  | 8,003 |
Deferred taxes |  |  |  |  |  | 1,257 |
Total liabilities assumed |  |  |  |  |  | 64,964 |
Sebree revenue | 38,753 |  |  |  |  |  |
Sebree net loss | (3,456) |  |  |  |  |  |
Pro forma revenues |  | 413,907 | 444,267 | 861,605 | 890,860 |  |
Pro forma earnings from continuing operations |  | $ (38,231) | $ (5,056) | $ (39,183) | $ (4,330) |  |
Loss per common share, basic |  | $ (0.43) | $ (0.06) | $ (0.44) | $ (0.05) |  |
Loss per common share, diluted |  | $ (0.43) | $ (0.06) | $ (0.44) | $ (0.05) |  |
[1] | (1)This amount represents our preliminary estimate of consideration based on our expectation of the working capital adjustments.

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