Share-Based Compensation and Other Compensation Matters (Details 6) - Options [Member] - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | |||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Options Outstanding and Exercisable (in shares) | 60,000 | 201,100 | 425,347 | 559,736 |
| Weighted Average Exercise Price Per Share (in dollars per share) | $ 35.17 | $ 43.35 | $ 42.75 | $ 39.60 |
| Weighted Average Remaining Contractual Term (years) | 1 year | 1 year | 1 year | 2 years |
| Aggregate Intrinsic Value | $ 0 | $ 31 | $ 0 | $ 167 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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