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Tax Treatment of Distributions - Dividends Tax Treatment (Details) - $ / shares
 12 Months Ended
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%