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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock-based Compensation, Stock Options and Stock Appreciation Rights Award Activity | The following table summarizes the grants awarded during the three months ended March 31, 2016:
Grant date |  | Restricted stock |  | Grant date fair value of restricted stock |  | Stock options |  | Grant date fair value of stock options |  | Performance shares |  | Grant date fair value of performance shares
January 20, 2016 |  | 1,030,833 |  |  | $ | 1.81 |  |  | 165,479 |  |  | $ | 0.86 |  |  | 1,428,314 |  |  | $ | 2.92 |
March 21, 2016 |  | 685,633 |  |  | $ | 5.76 |  |  | 17,772 |  |  | $ | 2.84 |  |  | 8,763 |  |  | $ | 4.90 |
The following options and stock appreciation rights were exercisable during the three months ended March 31, 2016:
Award Type |  | Number of Exercised Units |  | Weighted Average Exercised Price |  | Number of Exercisable Units |  | Weighted Average Exercisable Price
Stock options |  | — |  |  | $ | — |  |  | 348,279 |  |  | $ | 17.68 |
Stock appreciation rights |  | — |  |  | $ | — |  |  | 46,572 |  |  | $ | 14.06 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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