Financial Highlights - Summary of Financial Highlights for One Share Common Stock Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Investment Company, Financial Highlights [Abstract]
Net asset value, beginning of period	$ 16.48	$ 16.84
Net investment income	1.68	1.47
Net realized and unrealized gain (loss)	0.35	(0.67)
Total from operations	2.03	0.8
Issuance of common stock, net of offering costs	0.03	0.04
Settlement of 2022 Convertible Notes		0.08
Repurchase of common stock		(0.01)
Dividends declared from net investment income	(1.57)	(1.39)
Total increase (decrease) in net assets	0.49	(0.48)
Net Asset Value, End of Period	16.97	16.36
Per share market value at end of period	$ 20.44	$ 16.34
Total return based on market value with reinvestment of dividends	23.65%	(24.69%)
Total return based on market value	25.14%	(24.20%)
Total return based on net asset value	12.49%	5.43%
Shares Outstanding, End of Period	87,546,498	81,170,965
Ratio of net expenses to average net assets	16.71%	9.92%
Ratio of net investment income to average net assets	13.39%	11.82%
Portfolio turnover	16.12%	21.31%
Net assets, end of period	$ 1,485,822	$ 1,328,052