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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Share-based Compensation [Abstract] |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] | A summary of restricted shares activity for the year ended December 31, 2013 follows (shares in thousands):
| Shares |  | Weighted-Average Grant-Date Fair Value
Restricted Shares at December 31, 2012 | 108 |  |  | $ | 41.82 |
Granted | — |  |  | — |
Vested | (45 | ) |  | 67.57 |
Forfeited | — |  |  | — |
Restricted Shares at December 31, 2013 | 63 |  |  | $ | 23.53 |
Schedule of Stock-Based Compensation Costs | A summary of stock-based compensation costs follows (in millions):
| Years Ended December 31,
| 2013 |  | 2012 |  | 2011
| (millions)
Total stock-based compensation costs: |  |  |  |  |
Restricted stock and restricted stock units | $ | 1.9 |  |  | $ | 4.4 |  |  | $ | 7.1 |
Performance awards and other | 0.1 |  |  | 0.8 |  |  | 1.3 |
Less: costs capitalized as part of inventory | — |  |  | (0.1 | ) |  | (0.4 | )
Expense included in selling, general and administrative and advanced technology costs | $ | 2.0 |  |  | $ | 5.1 |  |  | $ | 8.0 |
Total recognized tax benefit | $ | — |  |  | $ | — |  |  | $ | — |
The total recognized tax benefit is reported at the federal statutory rate net of the tax valuation allowance.

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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