Fair Value - Summary of Quantitative Information About The Company's Level 3 Asset Fair Value Measurements (Detail) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Bank Debt/Senior Secured Loans | Valuation, Income Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value Disclosure	$ 222,764	$ 294,802
Preferred Equity [Member] | Valuation, Income Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value Disclosure	10,688	10,223
Common Equity/Equity Interests/Warrants | Transaction Price [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value Disclosure	224	224
Common Equity/Equity Interests/Warrants | Measurement Ebitda Multiple | Measurement Input Comparable Multiple [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value Disclosure	8,797	11,240
Common Equity/Equity Interests/Warrants | Valuation, Market Approach [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value Disclosure	$ 14	$ 20
Minimum [Member] | Bank Debt/Senior Secured Loans | Valuation, Income Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	9.2	9.2
Minimum [Member] | Preferred Equity [Member] | Valuation, Market Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	9	9
Minimum [Member] | Common Equity/Equity Interests/Warrants | Measurement Ebitda Multiple | Measurement Input Comparable Multiple [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	5.5	5.5
Minimum [Member] | Common Equity/Equity Interests/Warrants | Valuation, Market Approach [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	18.6	22.9
Maximum [Member] | Bank Debt/Senior Secured Loans | Valuation, Income Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	19	17.4
Maximum [Member] | Preferred Equity [Member] | Valuation, Market Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	9	9
Maximum [Member] | Common Equity/Equity Interests/Warrants | Measurement Ebitda Multiple | Measurement Input Comparable Multiple [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	6.5	6.5
Maximum [Member] | Common Equity/Equity Interests/Warrants | Valuation, Market Approach [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	18.6	22.9
Weighted Average [Member] | Bank Debt/Senior Secured Loans | Valuation, Income Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	11.8	11.4
Weighted Average [Member] | Preferred Equity [Member] | Valuation, Market Approach [Member] | Measurement Input Market Yield [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	9	9
Weighted Average [Member] | Common Equity/Equity Interests/Warrants | Measurement Ebitda Multiple | Measurement Input Comparable Multiple [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	6	6
Weighted Average [Member] | Common Equity/Equity Interests/Warrants | Valuation, Market Approach [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	18.6	22.9