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Agreements and Related Party Transactions (Details)					12 Months Ended
	Aug. 02, 2022	Feb. 25, 2022 USD ($)	Jan. 01, 2021 qtr	Dec. 23, 2020 USD ($)	Dec. 31, 2024 USD ($) component	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2018
Related Party Transaction [Line Items]
Look-back period provision | qtr			12
Base management fee					$ 32,404,000	$ 32,649,000	$ 29,501,000
Base management fees payable					7,888,000	8,347,000
Incentive management fees					23,757,000	32,046,000	6,579,000
Incentive management fees payable					7,871,000	7,737,000
Administrative fees expenses					2,000,000	2,200,000	3,400,000
Administrative fees payable					$ 540,000	536,000
Original Advisory Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Base management fee, percent	1.375%
Incentive fee, percent		2.00%
Amended and Restated Advisory Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Base management fee, percent			1.25%
New Barings BDC Advisory Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent		2.0625%
Original Advisory Agreement - Annualized Incentive Fee Rate | Affiliated Entity
Related Party Transaction [Line Items]
Base management fee, percent		8.00%
New Barings BDC Advisory Agreement - Annualized Incentive Fee Rate | Affiliated Entity
Related Party Transaction [Line Items]
Base management fee, percent		8.25%
Investment Advisory Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Base management fee, percent					1.25%
Investment Management Agreement | Related Party
Related Party Transaction [Line Items]
Number of components | component					2
Investment Management Agreement - Incentive Rate, Quarterly Hurdle Rate | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			2.0625%
Investment Management Agreement - Incentive Rate, Annualized Hurdle Rate | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			8.25%
Investment Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			100.00%
Investment Management Agreement - Incentive Rate, Quarterly Catch-Up Threshold | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			2.57813%
Investment Management Agreement - Incentive Rate, Annual Catch-Up Threshold | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			10.3125%
Investment Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			20.00%
Pre-Incentive Fee Net Investment Income For Trailing Twelve Quarters Exceeds Catch-Up Amount | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			20.00%
Investment Management Agreement - Incentive Rate, Cumulative Pre-Incentive Fee Net Return | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent			20.00%
Investment Management Agreement - Incentive Rate, Realized Capital Gains | Affiliated Entity
Related Party Transaction [Line Items]
Incentive fee, percent								20.00%
Investment Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income
Related Party Transaction [Line Items]
Incentive management fees					$ 23,800,000	32,000,000.0
Investment Management Agreement - Incentive Rate, Capital Gain Fee
Related Party Transaction [Line Items]
Incentive management fees					$ 0	$ 0	$ 0
MVC Credit Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction amount (up to)				$ 23,000,000
Related party transaction, term				10 years
MVC Credit Support Agreement - Covered Credit Losses Minimum | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction amount (up to)				$ 0.00
Sierra Credit Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction amount (up to)		$ 100,000,000
Related party transaction, term		10 years
Sierra Credit Support Agreement Covered Credit Losses Minimum | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction amount (up to)		$ 0.00

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