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Fair Value Measurements - Summary of Significant Unobservable Inputs by Valuation Technique to Determine Fair Value (Details) $ in Thousands	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 383,365	$ 357,429
Level 3 | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity Fair Value	96,905	162,681
Equity Investments, Warrants fair value	$ 2,525	$ 3,075
Level 3 | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	3.5	3.5
Equity investments, Warrants range	5.0	4.5
Level 3 | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	16.0	23.8
Equity investments, Warrants range	6.0	6.0
Level 3 | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	7.2	8.2
Equity investments, Warrants range	5.8	5.9
Level 3 | Enterprise Value | Revenue Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity Fair Value	$ 9,729	$ 3,081
Equity Investments, Warrants fair value	$ 123	$ 129
Level 3 | Enterprise Value | Revenue Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	3.0	3.5
Equity investments, Warrants range	4.5	4.5
Level 3 | Enterprise Value | Revenue Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	7.8	9.3
Equity investments, Warrants range	4.5	4.5
Level 3 | Enterprise Value | Revenue Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	6.4	6.2
Equity investments, Warrants range	4.5	4.5
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 78,009	$ 36,064
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.101	0.100
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.140	0.135
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.111	0.111
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 3,750
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.5
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 449,319	$ 335,022
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.063	0.040
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.199	0.216
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.137	0.122
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 11,000	$ 11,000
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.1	1.2
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.1	1.2
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.1	1.2
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 15,000
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.8
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.8
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	8.8
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 13,015	$ 8,900
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.3	4.5
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	4.1	4.5
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	2.5	4.5
Level 3 | Second Lien Debt | Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 18,000
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 172,625	$ 144,541
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.102	0.078
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.220	0.250
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.137	0.144
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 2,169	$ 14,274
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.9	1.0
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.9	1.4
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.9	1.4
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 2,428
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0

X

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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- Definition

Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

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Value of input used to measure derivative asset.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Value of input used to measure investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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