Financial Highlights - Schedule of Financial Highlights (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		12 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Investment Company, Financial Highlights [Line Items]
Net Asset Value Per Share, Beginning Balance	[1]	$ 13.5	$ 14.22	$ 14.22
Net investment income	[1]	0.46	0.45
Total from investment operations	[1]	0.3	0.3
Distributions	[1]	(0.47)	(0.45)
Accretion (dilution)	[2]	0.03
Net Asset Value Per Share, Ending Balance	[1]	$ 13.36	$ 14.07	$ 13.5
Net assets at beginning of period		$ 547,071	$ 576,052	$ 576,052
Net assets at end of period		529,469	569,807	$ 547,071
Weighted average net assets		$ 542,836	$ 583,731
Weighted average shares outstanding (basic)		40,392,255	40,509,269
Ratio/Supplemental Data:
Total return based on net asset value	[3]	2.44%	2.11%
Total return based on market value	[4]	(0.24)	8.54
Ratio of net investment income to average net assets	[5],[6]	13.83%	12.68%
Ratio of total operating expenses to average net assets	[5],[6]	15.81%	14.63%
Ratio of total operating expenses excluding incentive fees to average net assets	[6]	12.36%	11.46%
Ratio of net increase (decrease) in net assets resulting from operations to average net assets	[6]	8.93%	8.33%
Portfolio turnover rate	[7]	2.41%	0.91%
Net Realized Gain (Loss)
Investment Company, Financial Highlights [Line Items]
Net realized gain (loss) and Change in unrealized (loss)	[1]		$ (0.03)
Net Change in Unrealized Gain (Loss)
Investment Company, Financial Highlights [Line Items]
Net realized gain (loss) and Change in unrealized (loss)	[1]	$ (0.16)	$ (0.12)

[1] All per share activity, excluding dividends, is calculated based on the weighted-average shares outstanding for the relevant period.

[2] Accretion (dilution) represents the effect of issuance of common stock and repurchase of treasury stock.

[3] Total return based on net asset value is calculated as the change in net asset value per share during the period plus dividends per share, divided by the beginning net asset values per share. The total returns are not annualized.

[4] Total return based on market value is calculated as the change in market value per share during the period plus dividends per share, divided by the beginning market value per share. The total returns are not annualized.

[5] The ratio includes annualized incentive fees and as incentive fees are performance driven, the amount expensed in future periods may vary significantly and is dependent on overall investment performance, early terminations, scheduled prepayments and other liquidity events.

[6] The ratios are calculated based on weighted average net assets for the relevant period and are annualized.

[7] The portfolio turnover rate for the period is calculated by taking the lesser of investment portfolio purchases or sales during the period, divided by the average investment portfolio value during the period. As such, portfolio turnover is not annualized.