Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE HIERARCHY FOR INVESTMENTS???PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Industry Sector (Details)

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FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Industry Sector (Details) - Industry Concentration Risk
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Investment Owned, At Cost    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 100.00% 100.00%
Investment Owned, At Cost | Internet Software & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 8.60% 8.80%
Investment Owned, At Cost | Commercial Services & Supplies    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 8.00% 8.50%
Investment Owned, At Cost | Diversified Consumer Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.90% 5.40%
Investment Owned, At Cost | Machinery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.50% 5.80%
Investment Owned, At Cost | Professional Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.50% 5.70%
Investment Owned, At Cost | IT Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.30% 5.20%
Investment Owned, At Cost | Health Care Providers & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.90% 6.50%
Investment Owned, At Cost | Containers & Packaging    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.20% 4.30%
Investment Owned, At Cost | Distributors    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.20% 4.40%
Investment Owned, At Cost | Electrical Equipment    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.80% 2.20%
Investment Owned, At Cost | Leisure Equipment & Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.60% 3.70%
Investment Owned, At Cost | Textiles, Apparel & Luxury Goods    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.10% 3.10%
Investment Owned, At Cost | Specialty Retail    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.90% 2.90%
Investment Owned, At Cost | Communications Equipment    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.70% 2.70%
Investment Owned, At Cost | Computers & Peripherals    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.70% 2.90%
Investment Owned, At Cost | Building Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.50% 2.10%
Investment Owned, At Cost | Construction & Engineering    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.50% 2.50%
Investment Owned, At Cost | Aerospace & Defense    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.40% 2.60%
Investment Owned, At Cost | Media    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.40% 2.50%
Investment Owned, At Cost | Diversified Financial Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.00% 2.10%
Investment Owned, At Cost | Hotels, Restaurants & Leisure    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.00% 2.10%
Investment Owned, At Cost | Household Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.00% 2.00%
Investment Owned, At Cost | Energy Equipment & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.70% 0.50%
Investment Owned, At Cost | Internet & Catalog Retail    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.70% 1.60%
Investment Owned, At Cost | Food & Staples Retailing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.60% 1.50%
Investment Owned, At Cost | Software    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.50% 1.40%
Investment Owned, At Cost | Health Care Equipment & Supplies    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.20% 1.30%
Investment Owned, At Cost | Other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.60% 5.70%
Investment Owned, At Fair Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 100.00% 100.00%
Investment Owned, At Fair Value | Internet Software & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 7.10% 7.30%
Investment Owned, At Fair Value | Commercial Services & Supplies    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 6.90% 7.30%
Investment Owned, At Fair Value | Diversified Consumer Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 6.90% 6.50%
Investment Owned, At Fair Value | Machinery    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 6.90% 7.20%
Investment Owned, At Fair Value | Professional Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.40% 5.50%
Investment Owned, At Fair Value | IT Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 5.20% 5.00%
Investment Owned, At Fair Value | Health Care Providers & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.30% 6.00%
Investment Owned, At Fair Value | Containers & Packaging    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.60% 4.60%
Investment Owned, At Fair Value | Distributors    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.60% 4.60%
Investment Owned, At Fair Value | Electrical Equipment    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.80% 2.30%
Investment Owned, At Fair Value | Leisure Equipment & Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.10% 3.30%
Investment Owned, At Fair Value | Textiles, Apparel & Luxury Goods    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.80% 2.90%
Investment Owned, At Fair Value | Specialty Retail    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.80% 2.90%
Investment Owned, At Fair Value | Communications Equipment    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.10% 1.10%
Investment Owned, At Fair Value | Computers & Peripherals    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.70% 4.60%
Investment Owned, At Fair Value | Building Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.30% 1.90%
Investment Owned, At Fair Value | Construction & Engineering    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 3.20% 3.10%
Investment Owned, At Fair Value | Aerospace & Defense    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.40% 2.50%
Investment Owned, At Fair Value | Media    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.50% 2.60%
Investment Owned, At Fair Value | Diversified Financial Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.90% 2.00%
Investment Owned, At Fair Value | Hotels, Restaurants & Leisure    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.60% 1.60%
Investment Owned, At Fair Value | Household Products    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.90% 1.90%
Investment Owned, At Fair Value | Energy Equipment & Services    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.40% 0.30%
Investment Owned, At Fair Value | Internet & Catalog Retail    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.50% 1.50%
Investment Owned, At Fair Value | Food & Staples Retailing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.30% 1.20%
Investment Owned, At Fair Value | Software    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.90% 1.70%
Investment Owned, At Fair Value | Other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 4.20% 4.80%
Investment Owned, At Fair Value | Construction Materials    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 2.10% 2.20%
Investment Owned, At Fair Value | Air Freight & Logistics    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Concentration risk, percentage (as a percent) 1.60% 1.60%