Share-Based Compensation and Other Compensation Matters (Details 1) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Share-Based Compensation | |||
| Share-based compensation cost | $ 6,095 | $ 7,453 | $ 7,398 |
| General, adminstrative and leasing expenses [Member] | |||
| Share-Based Compensation | |||
| Share-based compensation cost | 4,649 | 5,816 | 5,574 |
| Property operating expenses [Member] | |||
| Share-Based Compensation | |||
| Share-based compensation cost | 966 | 1,027 | 1,000 |
| Capitalized to development activities [Member] | |||
| Share-Based Compensation | |||
| Share-based compensation cost | $ 480 | $ 610 | $ 824 |
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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 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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