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Summary of Significant Accounting Policies - Common Stock Distributions (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Tax status of common stock distributions deemed paid during the year: |  |  |
Ordinary income (usd per share) | $ 1.241 | $ 1.069 | $ 0.829
Long-term capital gains (usd per share) | 0 | 0 | 0.359
Nondividend distributions (usd per share) | 0 | 0 | 0
Distributions declared per Common Share outstanding (usd per share) | $ 1.241 | $ 1.069 | $ 1.188

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- Definition Aggregate tax treatment of dividends declared during the period for each share of common stock outstanding. + References No definition available. + Details
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- Definition Long-term Capital Gains, Per Common Share + References No definition available. + Details
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- Definition Represents the portion of common stock dividends declared or paid during the period that are taxable as ordinary income. + References No definition available. + Details
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- Definition Detail showing the tax status of Common Share distributions deemed paid during the periods covered in the document. + References No definition available. + Details
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