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Share-Based Compensation (Schedule of Share-Based Compensation Information) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Share Based Compensation [Abstract] |  |  |  |
Expense relating to share/unit grants | $ 1,127,000 | $ 1,080,000 | $ 3,364,000 | $ 3,134,000
Amounts capitalized | (92,000) | (116,000) | (286,000) | (333,000)
Total charged to operations | $ 1,035,000 | $ 964,000 | $ 3,078,000 | $ 2,801,000

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