Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Share-based Compensation [Abstract] | |||
| Stock-based compensation expense | $ 10,600 | $ 12,300 | $ 14,400 |
| Capitalized stock-based compensation | $ 4,246 | $ 4,900 | $ 5,743 |
| Additional time over vesting period | 1 year | ||
| Options granted for compensation plan | 0 | 0 | 0 |
| Unrecognized compensation expense | $ 14,400 | ||
| Weighted average period | 1 year 5 months 16 days | ||
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- Definition Non-cash stock based compensation capitalized. No definition available.
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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Options Granted, Additional Time Over Vesting Period No definition available.
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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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- References No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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