Financial Highlights - Schedule of Financial Highlights of the Company (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019	[4]	Dec. 31, 2018		Dec. 31, 2017	[4]	Dec. 31, 2016
Per Share Data:
NAV, beginning of period		$ 13.41	[1],[2]	$ 14.62	[1],[2]	$ 14.61	[2]	$ 15.86	[2]	$ 15.91	[2],[3]	$ 16.75	[3],[4]	$ 17.65	[3]	$ 18.09	[3],[4]	$ 18.31	[3]	$ 18.97	[3],[4]
Net investment income		1.57	[2]	2.2	[2]	2.28	[2]	2.24	[2]	2.33	[2]	2.04	[3]	1.98	[3]	2.06	[3],[4]	2.07	[3]	2.1	[3],[4]
Net realized and unrealized gains (losses)		(0.54)	[2],[5]	(1.64)	[2],[5]	(0.48)	[2],[5]	(1.7)	[2],[5],[6]	(0.43)	[2],[5]	(0.2)	[3],[7]	(1.08)	[3],[7]	(0.7)	[3],[4],[7]	(0.8)	[3],[7]	(0.98)	[3],[4],[7]
(Provision) benefit for taxes on realized and unrealized gains (losses) on investments						(0.01)	[2],[8]									(0.02)	[3],[4]
Net increase (decrease) in net assets from operations		1.03	[2]	0.56	[2]	1.79	[2]	0.54	[2]	1.9	[2]	1.84	[3]	0.9	[3]	1.34	[3],[4]	1.27	[3]	1.12	[3],[4]
Issuance of common stock in connection with the Merger	[3]											(0.88)
Repurchases of common stock, including commissions and direct acquisition costs	[2]	0.08
Issuance of common stock, net of underwriting and offering costs				0.03	[2]	0.02	[2]	0.01	[2],[6]									0.31	[3]
Equity component of convertible notes	[3],[4]															0.02				0.02
Distributions to common stockholders		(1.88)	[2]	(1.8)	[2]	(1.8)	[2]	(1.8)	[2]	(1.95)	[2]	(1.8)	[3]	(1.8)	[3]	(1.8)	[3],[4]	(1.8)	[3]	(1.8)	[3],[4]
Total increase (decrease) in net assets		(0.77)	[2]	(1.21)	[2]	0.01	[2]	(1.25)	[2]	(0.05)	[2]	(0.84)	[3]	(0.9)	[3]	(0.44)	[3],[4]	(0.22)	[3]	(0.66)	[3],[4]
NAV, end of period		12.64	[1],[2]	13.41	[1],[2]	14.62	[1],[2]	14.61	[2]	15.86	[2]	15.91	[2],[3]	16.75	[3]	17.65	[3],[4]	18.09	[3]	18.31	[3],[4]
Market price, end of period		$ 9.28	[2]	$ 12.1	[2]	$ 14.65	[2]	$ 13.72	[2]	$ 19.16	[2]	$ 19.12	[3]	$ 21.28	[3]	$ 18.38	[3],[4]	$ 22.18	[3]	$ 23.52	[3],[4]
Shares outstanding, end of period		112,569,067	[2]	117,297,222	[2]	109,563,525	[2]	102,850,589	[2]	101,818,811	[2]	101,534,370	[3]	40,367,071	[3]	40,227,625	[3],[4]	40,130,665	[3]	36,331,662	[3],[4]
Weighted average shares outstanding, basic		115,576,890	[2]	114,673,460	[2]	108,305,428	[2]	102,258,701	[2]	101,691,076	[2]	53,940,573	[3]	40,313,662	[3]	40,184,715	[3],[4]	38,633,652	[3]	36,317,131	[3],[4]
Weighted average shares outstanding, diluted		115,576,890	[2]	114,673,460	[2]	108,305,428	[2]	102,258,701	[2]	101,691,076	[2]	53,940,573	[3]	40,313,662	[3]	40,184,715	[3],[4]	38,633,652	[3]	36,317,131	[3],[4]
Total return based on NAV		12.18%	[2],[9]	4.12%	[2],[9]	13.35%	[2],[9]	2.80%	[2],[9]	10.67%	[2],[9]	6.78%	[3],[10]	4.08%	[3],[10]	6.96%	[3],[4],[10]	7.17%	[3],[10]	5.42%	[3],[4],[10]
Total return based on market value		(8.73%)	[2],[11]	(6.25%)	[2],[11]	20.95%	[2],[11]	(20.09%)	[2],[11]	11.26%	[2],[11]	1.00%	[3],[12]	26.98%	[3],[12]	(9.16%)	[3],[4],[12]	2.30%	[3],[12]	35.20%	[3],[4],[12]
Supplemental Data/Ratio:
Net assets, end of period		$ 1,423,019		$ 1,572,700		$ 1,601,825		$ 1,502,394		$ 1,614,400		$ 1,615,141		$ 676,125		$ 709,892	[4]	$ 725,830		$ 665,137	[4]
Ratio of net expenses to average net assets		12.25%		11.39%		13.17%		8.19%		6.75%		7.62%		9.77%		8.81%	[4]	8.07%		7.25%	[4]
Ratio of net expenses before voluntary waivers to average net assets		12.25%		11.39%		13.29%		8.93%		8.42%		9.30%		9.77%		8.81%	[4]	8.07%		7.25%	[4]
Ratio of net expenses (without incentive fees and interest and other debt expenses) to average net assets		3.07%		3.19%		3.10%		3.10%		2.53%		2.48%		3.24%		3.26%	[4]	3.47%		3.58%	[4]
Ratio of interest and other debt expenses to average net assets		7.43%		7.12%		7.06%		5.05%		3.63%		4.82%		5.25%		3.62%	[4]	2.79%		2.12%	[4]
Ratio of net incentive fees to average net assets		1.75%		1.08%		3.01%		0.04%		0.59%		0.32%		1.28%		1.93%	[4]	1.81%		1.55%	[4]
Ratio of total expenses to average net assets		12.25%		11.39%		13.29%		8.93%		8.70%		12.09%		9.82%		8.81%	[4]	8.07%		7.25%	[4]
Ratio of net investment income to average net assets		12.09%		15.82%		15.68%		14.52%		14.62%		13.28%		11.53%		11.42%	[4]	11.36%		11.30%	[4]
Portfolio turnover		32.00%		30.00%		15.00%		20.00%		48.00%		24.00%		45.00%		26.00%	[4]	45.00%		17.00%	[4]

[1] NAV per share is determined as of the last day in the relevant quarter and therefore may not reflect the NAV per share on the date of the high and low closing sales prices. The NAVs shown are based on outstanding shares at the end of the relevant quarter.

[2] The per share data was derived by using the weighted average shares outstanding during the applicable period that the shares were outstanding, except for distributions recorded, which reflects the actual amount per share for the applicable period.

[3] The per share data was derived by using the weighted average shares outstanding during the applicable period, except for distributions recorded and issuance of common stock in connection with the Merger, which reflects the actual amount per share for the applicable period.

[4] Not covered by the report of the independent registered public accounting firm.

[5] The amount shown may not correspond for the period as it includes the effect of the timing of the distribution, the issuance and the repurchase of common stock.

[6] The table above reflects a reclassification between Net realized and unrealized gains (losses) and Issuance of common stock, net of underwriting and offering costs for the year ended December 31, 2022 as compared to previously reported amounts in order to conform with the methodology used to calculate such amounts for the year ended December 31, 2023. The effect of this reclassification was a change in Net realized and unrealized gains (losses) of $0.12, from $(1.82) to $(1.70), and an offsetting change in Issuance of common stock, net of underwriting and offering costs of $(0.12), from $0.13 to $0.01. This reclassification was not material to the Company’s consolidated financial statements, only impacted the lines noted above and had no impact on the Company’s financial condition, results of operations or cash flows.

[7] The amount shown may not correspond for the period as it includes the effect of the timing of the distribution, the issuance and the repurchase of common stock.

[8] Amount rounds to less than $0.01.

[9] Calculated as the change in NAV per share during the respective periods, assuming dividends and distributions, if any, are reinvested in accordance with the Company’s DRIP.

[10] Calculated as the change in NAV per share during the respective periods, assuming dividends and distributions, if any, are reinvested in accordance with the Company’s DRIP.

[11] Calculated as the change in market value per share during the respective periods, assuming dividends and distributions, if any, are reinvested in accordance with the Company’s DRIP.

[12] Calculated as the change in market value per share during the respective periods, assuming dividends and distributions, if any, are reinvested in accordance with the Company’s DRIP.