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Amount of expense for investment management fee, including, but not limited to, expense in connection with research, selection, supervision, and custody of investment.

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Transactions with Related Parties - Narrative (Details) $ in Thousands						3 Months Ended		9 Months Ended
	Mar. 31, 2025 component	Apr. 01, 2022	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Transactions with Related Parties
Base management fees						$ 17,264	$ 11,542	$ 47,208	$ 30,169
Administrative agreement service fee						1,189	790	3,247	2,039
Accounts payable and accrued expenses						25,418		25,418		$ 19,977
Related Party
Transactions with Related Parties
Accounts payable						37		$ 37		0
Related Party \| Monroe Capital LLC \| Wendel
Transactions with Related Parties
Subsidiary, ownership percentage, parent	75.00%
MC Advisors \| Related Party
Transactions with Related Parties
Number of components \| component	2
Initial base management fee, percentage		1.25%	1.50%
Base management fee, percentage								1.75%
Base management fees						17,264	11,542	$ 47,208	30,169
Quarterly hurdle rate percentage		1.50%						1.50%
Annual hurdle rate percentage		6.00%						6.00%
Incentive fee payable as a percentage of pre-incentive fee net investment income, if such income does not exceed the hurdle rate in any calendar quarter		0.00%
Incentive fee payable as a percentage of pre-incentive fee net investment income, if portion of such income exceeds the hurdle rate but is less than the specified hurdle rate in any calendar quarter		100.00%
Specified percentage of hurdle rate, considered for payment of incentive fee, prior to an exchange listing		1.7143%	1.76%
Specified percentage of hurdle rate, considered for payment of incentive fee, following an exchange listing		1.88%
Incentive fee payable as a percentage of pre-incentive fee net investment income, if such income exceeds the specified hurdle rate in any calendar quarter, prior to an exchange listing		12.50%	15.00%
Incentive fee payable as a percentage of pre-incentive fee net investment income, if such income exceeds the specified hurdle rate in any calendar quarter, following an exchange listing		20.00%
Percentage of company's realized capital gains payable as incentive fee				12.50%	15.00%
MC Management \| Related Party
Transactions with Related Parties
Administrative expenses						3,832	$ 2,876	$ 9,356	$ 7,172
Accounts payable and accrued expenses						$ 1,261		$ 1,261		$ 805