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Income taxes (Tables)
 12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Summary of Federal Tax Attributes of Common Dividends Percentage The federal tax attributes of the common dividends for the years ended December 31, 2022, 2021 and 2020, were:

 

 

 

2022

 

 

2021

 

 

2020

 

Ordinary income

 

 

77.00

%

 

 

73.00

%

 

 

88.70

%

Capital gain distributions

 

 

3.00

%

 

 

5.50

%

 

 

3.40

%

Non-taxable distributions

 

 

20.00

%

 

 

21.50

%

 

 

7.90

%

 

 

 

100.00

%

 

 

100.00

%

 

 

100.00

%