Federal Income Taxes - Schedule of Tax Status of Dividends (Details) - $ / shares		3 Months Ended		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Total (in dollars per share)		$ 0.15	$ 0.29	$ 0.60	$ 0.29	$ 1.13
Characterization Of Distributions For Federal Income Tax Purposes
Income Tax Contingency [Line Items]
Qualified dividend (in dollars per share)				0.010	0	0
Capital gain (in dollars per share)				0.040	0.060	0.240
Total (in dollars per share)	[1]			$ 0.600	$ 0.580	$ 1.060
Qualified dividend				1.00%	0.00%	0.00%
Capital gain				7.00%	10.00%	23.00%
Total	[1]			100.00%	100.00%	100.00%
Non-Section 199A | Characterization Of Distributions For Federal Income Tax Purposes
Income Tax Contingency [Line Items]
Ordinary income (in dollars per share)
Ordinary income
Section 199A | Characterization Of Distributions For Federal Income Tax Purposes
Income Tax Contingency [Line Items]
Ordinary income (in dollars per share)				$ 0.550	$ 0.520	$ 0.820
Ordinary income				92.00%	90.00%	77.00%

[1] The fourth quarter 2021 regular dividend was $0.15 per common share, all of which is allocable to 2021. The fourth quarter 2019 regular dividend was $0.29 per common share, all of which is allocable to 2020.