Share-Based Compensation (Summary of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding as of January 1, 2018 \| shares	1,377
Exercised \| shares	(62)
Forfeited or Expired \| shares	(155)
Outstanding as of December 31, 2018 \| shares	1,160
Vested at December 31, 2018 \| shares	1,160
Weighted average exercise price outstanding as of January 1, 2018 \| $ / shares	$ 6.34
Weighted average exercise price, exercised \| $ / shares	4.78
Weighted average exercise price, forfeited or expired \| $ / shares	5.60
Weighted average exercise price outstanding as of December 31, 2018 \| $ / shares	6.52
Weighted average exercise price, vested at December 31, 2018 \| $ / shares	$ 6.52
Weighted average remaining contractual term, outstanding at December 31, 2018	2 years 9 months 18 days
Weighted average remaining contractual term, vested as of December 31, 2018	2 years 9 months 18 days
Aggregate intrinsic value, outstanding as of December 31, 2018 \| $	$ 646
Aggregate intrinsic value, vested at December 31, 2018 \| $	$ 646

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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