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Shared-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Reconciliation of Option Activity | The following table provides a reconciliation of option activity for the three months ended June 30, 2016:
Options |  | Shares (000) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2016 |  |  | 1,034 |  |  | $ | 12.09 |  |  |  |  |  |  |  |  |
Granted |  |  | 167 |  |  | $ | 11.31 |  |  |  |  |  |  |  |  |
Exercised |  |  | (145 | ) |  | $ | 10.55 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (23 | ) |  | $ | 16.17 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2016 |  |  | 1,033 |  |  | $ | 12.09 |  |  |  | 6.2 |  |  | $ | 3,073 | (1)
Exercisable at June 30, 2016 |  |  | 816 |  |  | $ | 11.47 |  |  |  | 5.4 |  |  | $ | 2,649 | (1)
(1) | The intrinsic value is the amount by which the market price of our stock was greater than the exercise price of any individual option grant at June 30, 2016.

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units 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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