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Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of stock-based compensation, activity | The number of shares granted to employees and the weighted average fair value per share during the periods presented were (shares in thousands):
| Three months ended March 31,
| 2017 |  | 2016
| Shares Granted |  | Weighted Average Share Fair Value |  | Shares Granted |  | Weighted Average Share Fair Value
RSUs subject to performance conditions | 1,237 |  |  | $ | 10.41 |  |  | 1,257 |  |  | $ | 5.66 |
RSUs subject only to service conditions | 395 |  |  | 10.41 |  |  | 433 |  |  | 5.67 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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