Financial Highlights - Schedule of financial highlights (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Per share data:
Net asset value at beginning of period	$ 10.13	$ 10.10
Net investment income	0.31	0.20
Net gain (loss)	0.07	0.07
Net increase (decrease) in net assets resulting from operations	0.38	0.27
Stockholder distributions declared	(0.25)	(0.20)
Other	(0.01)	(0.01)
Net asset value at end of period	$ 10.25	$ 10.16
Total return based on average net asset value	9.00%	2.38%
Ratio/Supplemental data:
Net assets at end of period	$ 858,859	$ 497,611
Shares outstanding at end of period	83,765,462	48,956,121
Portfolio turnover	2.31%	3.03%
Ratio of total investment income to average net assets	23.05%	15.33%
Ratio of expenses to average net assets	9.73%	6.64%