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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Computation of Earnings (Loss) Per Share | Earnings (loss) per share were computed as follows (dollars in millions, except per-share amounts):
| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
Weighted average shares: |  |  |  |  |
Basic weighted average shares outstanding | 50,996,297 |  |  | 50,789,173 |  |  | 50,692,942 |
Effect of dilutive securities outstanding | — |  |  | 590,525 |  |  | 370,247 |
Diluted weighted average and equivalent shares outstanding | 50,996,297 |  |  | 51,379,698 |  |  | 51,063,189 |
Net (loss) income | $ | (137 | ) |  | $ | 32 |  |  | $ | 134 |
Basic per share amounts: |  |  |  |  |
Basic weighted average shares outstanding | 50,996,297 |  |  | 50,789,173 |  |  | 50,692,942 |
Per share amount | $ | (2.69 | ) |  | $ | 0.64 |  |  | $ | 2.65 |
Diluted per share amounts: |  |  |  |  |
Diluted weighted average shares outstanding | 50,996,297 |  |  | 51,379,698 |  |  | 51,063,189 |
Per share amount | $ | (2.69 | ) |  | $ | 0.63 |  |  | $ | 2.63 |
Potentially Dilutive Securities Excluded from Earnings (Loss) Per Share Calculation | These excluded outstanding options, awards and warrants are as follows:
| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
Potentially dilutive shares | 1,421,506 |  |  | 175,902 |  |  | 168,472 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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