Basis of Presentation and Significant Accounting Policies - Summary of Characterization of Dividend Distributions for Federal Income Tax Purposes (Details) - $ / shares	3 Months Ended			12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Cash dividend	$ 0.07	$ 0.07	$ 0.10	$ 0.280	$ 0.400	$ 0.400
Ordinary income				90.40%	52.50%	80.70%
Long-term capital gain				8.20%	47.50%	15.50%
Return of capital				1.40%	0.00%	3.80%
Total				100.00%	100.00%	100.00%
Ordinary Income [Member]
Income Taxes [Line Items]
Cash dividend				$ 0.253	$ 0.210	$ 0.323
Long-Term Capital Gain [Member]
Income Taxes [Line Items]
Cash dividend				0.023	0.190	0.062
Return of Capital [Member]
Income Taxes [Line Items]
Cash dividend				$ 0.004	$ 0.000	$ 0.015