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Debt Level 3 Debt (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Debt Disclosure [Abstract] |  |
Debt [Table Text Block] | Long-term debt consisted of the following:
|  | June 30, 2013 |  | December 31, 2012
|  | (thousands)
Asset-based revolving credit facility |  | $ | — |  |  | $ | 25,000 |
6.375% senior notes |  | 250,000 |  |  | 250,000 |
Long-term debt |  | $ | 250,000 |  |  | $ | 275,000 |
| Long-term debt consisted of the following:
|  | December 31, 2012 |  | December 31, 2011
|  | (thousands)
Asset-based revolving credit facility |  | $ | 25,000 |  |  | $ | — |
6.375% senior notes |  | 250,000 |  |  | — |
7.125% senior subordinated notes |  | — |  |  | 219,560 |
Long-term debt |  | $ | 275,000 |  |  | $ | 219,560 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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