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Tax Treatment of Distributions - Dividends Tax Treatment (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Capital gains, federal statutory tax rate | 20.00% |  |
Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 2.020 | $ 1.955 | $ 1.880
Ordinary income | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 1.338 | $ 1.474 | $ 0.939
Dividends paid per common share, percentage | 66.22% | 75.40% | 49.95%
Qualified dividend | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 0.003 | $ 0.002 | $ 0.004
Dividends paid per common share, percentage | 0.15% | 0.12% | 0.21%
Return of capital | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 0.551 | $ 0.162 | $ 0.312
Dividends paid per common share, percentage | 27.30% | 8.30% | 16.62%
Capital gains | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 0.075 | $ 0.275 | $ 0.600
Dividends paid per common share, percentage | 3.72% | 14.05% | 31.93%
Unrecaptured section 1250 gains | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 0.053 | $ 0.042 | $ 0.025
Dividends paid per common share, percentage | 2.61% | 2.13% | 1.29%
Tax treatment | Common Stock |  |  |
Income Tax Treatment of Dividends Paid [Line Items] |  |  |
Dividends paid per common share (in dollars per share) | $ 2.020 | $ 1.955 | $ 1.880
Dividends paid per common share, percentage | 100.00% | 100.00% | 100.00%

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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