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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, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Share Based Compensation [Abstract] |  |  |  |
Expense relating to share/unit grants | $ 822,000 | $ 1,127,000 | $ 2,930,000 | $ 3,364,000
Amounts capitalized | (55,000) | (92,000) | (177,000) | (286,000)
Total charged to operations | $ 767,000 | $ 1,035,000 | $ 2,753,000 | $ 3,078,000

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