First Eagle Alternative Capital BDC, Inc. Acquisition - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 09, 2023	Jun. 30, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Common stock, par value		$ 0.001	$ 0.001
Common stock, issued		37,061,547	37,061,547
Common stock value		$ 37	$ 37
Sun Life Financial Inc
Business Acquisition [Line Items]
Common stock value	$ 20,000	$ 12,618
FCRD Acquisition
Business Acquisition [Line Items]
Common stock, par value	$ 0.001
Cash consideration	$ 8,649
Number of shares issued in merger	6,174,187
Cash consideration per share	$ 14.78
FCRD Acquisition | Electing Share
Business Acquisition [Line Items]
Cash consideration per share	$ 0.509
Common stock, issued	0.195
FCRD Acquisition | Non-Electing Share
Business Acquisition [Line Items]
Common stock, issued	0.2209
FCRD Acquisition | Adviser
Business Acquisition [Line Items]
Cash consideration	$ 35,000
FCRD Acquisition | Adviser | Electing Share
Business Acquisition [Line Items]
Cash consideration per share	$ 1.17
FCRD Acquisition | Adviser | Non-Electing Share
Business Acquisition [Line Items]
Cash consideration per share	$ 1.17