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Share-Based Compensation (Summary of Nonvested Share Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Number of Non-vested Shares |  |
December 31, 2013 (in shares) | 1,561 |
Granted (in shares) | 535 |
Vested (in shares) | (511) |
Forfeited (in shares) | (64) |
June 30, 2014 (in shares) | 1,521 |
Weighted Average Grant Date Fair Value |  |
December 31, 2013 (in dollars per share) | $ 4.78 |
Granted (in dollars per share) | $ 8.24 | $ 6.81
Vested (in dollars per share) | $ 4.38 |
Forfeited (in dollars per share) | $ 5.98 |
June 30, 2014 (in dollars per share) | $ 6.27 |

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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 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 Weighted average grant-date fair value of options vested. + References No definition available. + Details
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