Organization - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended	12 Months Ended
	Mar. 08, 2021	Jan. 05, 2021	Sep. 30, 2024	Dec. 31, 2024
Initial Unitholder [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Issuance of common shares shares		40
Share price	$ 29.3	$ 1
Capital commitments				$ 83,850
Issuance of common shares value	$ 3,500
Withdrawal of capital commitments				28,000
Unfunded commitments				$ 55,850
First Lien Health Care Cash Flow Loans [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument maturity date				five to six year
Debt Instrument, Payment Terms				often repaid within three years
First Lien Health Care Cash Flow Loans [Member] \| Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument carrying amount				$ 300,000
Debt Instrument, Term				6 years
First Lien Health Care Cash Flow Loans [Member] \| Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument carrying amount				$ 100,000
Debt Instrument, Term				5 years
First Lien Health Care Cash Flow Loans [Member] \| EBITDA Concentration Risk [Member] \| Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earnings Before Interest Tax Depreciation And Amortization			$ 100,000
First Lien Health Care Cash Flow Loans [Member] \| EBITDA Concentration Risk [Member] \| Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earnings Before Interest Tax Depreciation And Amortization				$ 25,000
First Lien Life Science Loans [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument maturity date				four to five year
Debt Instrument, Payment Terms				often repaid within two to three years
First Lien Life Science Loans [Member] \| Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument carrying amount				$ 150,000
Debt Instrument, Term				5 years
Debt Instrument, Frequency of Periodic Payment				three years
First Lien Life Science Loans [Member] \| Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Debt instrument carrying amount				$ 25,000
Debt Instrument, Term				4 years
Debt Instrument, Frequency of Periodic Payment				two years

SLR HC BDC LLC 10-K