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Income Taxes (Schedule Of Per Share Distributions) (Details) (USD $)
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12 Months Ended | |||||||
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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| Income Taxes [Abstract] | ||||||||
| Common share distribution | $ 0.800000 | $ 0.800000 | $ 1.080000 | |||||
| Ordinary income | $ 0.388128 | $ 0.471792 | $ 0.677940 | |||||
| Capital gains | $ 0.027724 | [1] | $ 0.003708 | [1] | $ 0.145400 | [1] | ||
| Unrecaptured Sec. 1250 gain | $ 0.022784 | $ 0.003708 | $ 0.138168 | |||||
| Return of capital | $ 0.384148 | $ 0.324500 | $ 0.256660 | |||||
| Allocable to next year | ||||||||
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