Formation and Business Purpose (Details) - USD ($) $ in Thousands		9 Months Ended
	May 23, 2023	Sep. 30, 2025	Sep. 30, 2024
Summary of Investment Holdings [Line Items]
Capital Commitments		$ 512,405	$ 490,505
Investment period	4 years
Term of company	6 years
Term of company, extension period	1 year
Term of company, additional extension period	1 year
Minimum
Summary of Investment Holdings [Line Items]
EBITDA as defined for middle market business		10,000
Maximum
Summary of Investment Holdings [Line Items]
EBITDA as defined for middle market business		200,000
Private Placement
Summary of Investment Holdings [Line Items]
Offering period	18 months
New Mountain Capital
Summary of Investment Holdings [Line Items]
Assets under management		$ 60,000,000