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Share-Based Compensation (Summary of Nonvested Share Activity) (Details) - $ / shares shares in Thousands | 6 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014
Number of Non-vested Shares |  |
December 31, 2014 (in shares) | 1,465 |
Granted (in shares) | 561 |
Vested (in shares) | (488) |
Forfeited (in shares) | (44) |
June 30, 2015 (in shares) | 1,494 |
Weighted Average Grant Date Fair Value |  |
December 31, 2014 (in dollars per share) | $ 6.17 |
Granted (in dollars per share) | 6.64 | $ 8.24
Vested (in dollars per share) | 5.17 |
Forfeited (in dollars per share) | 6.59 |
June 30, 2015 (in dollars per share) | $ 6.66 |

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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