Debt - Additional Information (Details) - USD ($)										12 Months Ended
		May 09, 2023	Mar. 09, 2023	Oct. 27, 2021	Feb. 17, 2021	Jul. 30, 2020	Jan. 31, 2020	Aug. 20, 2019	Mar. 28, 2016	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 05, 2021	Mar. 31, 2021	Dec. 31, 2020	Oct. 28, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Weighted average interest rate										7.02%	4.73%	3.72%
Weighted average debt outstanding										$ 836,999,000	$ 673,503,000	$ 530,675,000
Aggregate Principal Amount Committed										1,181,600,000	885,000,000
Deferred financing costs, net										7,138,000	5,380,000
Series 2020A Unsecured Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed											50,000,000
Debt instrument, aggregate principal amount						$ 50,000,000
Debt instrument, offering date						Jul. 30, 2020
Debt instrument, interest rate						5.95%
Debt instrument, maturity date						Jul. 30, 2023
Series 2020A Unsecured Notes, Issued on July 30, 2020
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount						$ 25,000,000
Series 2020A Unsecured Notes, Issued on October 28, 2020
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount																$ 25,000,000
Series 2021A Unsecured Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed	[1]									135,000,000	135,000,000
Deferred financing costs, net										$ 609,000	895,000
Debt instrument, aggregate principal amount					$ 135,000,000
Debt instrument, offering date					Feb. 17, 2021
Debt instrument, interest rate					4.00%
Debt instrument, maturity date					Feb. 17, 2026
Debt instrument, redemption, description										The Series 2021A Unsecured Notes will mature on February 17, 2026 and may be redeemed in whole or in part, at the Company’s option, at any time or from time to time at par plus a “make-whole” premium, if applicable
Series 2021A Unsecured Notes, Closed on February 17, 2021
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount					$ 50,000,000
Series 2021A Unsecured Notes, Closed on May 5, 2021
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount													$ 85,000,000
FCRX Unsecured Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed	[2]									$ 111,600,000
Debt instrument, aggregate principal amount			$ 111,600,000
Percentage of redemption price of outstanding principal amount			100.00%
Debt instrument, interest rate			5.00%
Debt instrument, maturity date			May 25, 2026
Debt instrument, redemption, description										The FCRX Unsecured Notes mature on May 25, 2026 and may be redeemed in whole or in part at any time or from time to time at the Company’s option, at a redemption price of 100% of the outstanding principal amount thereof plus accrued and unpaid interest payments otherwise payable for the then-current quarterly interest period accrued to but not including the date fixed for redemption
Series 2023A Unsecured Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed	[3]									$ 50,000,000
Deferred financing costs, net										$ 193,000
Debt instrument, aggregate principal amount		$ 50,000,000
Debt instrument, offering date		May 09, 2023
Debt instrument, interest rate		7.54%
Debt instrument, maturity date		Jul. 28, 2026
Debt instrument, redemption, description										The Series 2023A Unsecured Notes will mature on July 28, 2026 and may be redeemed in whole or in part, at the Company’s option, at any time or from time to time at par plus a “make-whole” premium, if applicable.
Series 2020A Unsecured Notes, Maturity On July 28, 2023
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount		$ 50,000,000
InterNotes
Debt Instrument [Line Items]
Debt Instrument, Repurchase Amount														$ 16,418,000
SPV Asset Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Committed									$ 500,000,000	$ 500,000,000	350,000,000
Line of credit facility, maturity date, description										The maturity date is the earlier of (a) the date the Borrower voluntarily reduces the commitments to zero, (b) March 7, 2028 and (c) the date upon which Wells Fargo declares the obligations due and payable after the occurrence of an Event of Default
Line of credit facility, interest rate description										plus a 2.75% margin with no floor
Unused facility fees									0.50%
Line of credit facility, covenant compliance										The SPV Asset Facility includes customary covenants, including certain limitations on the incurrence of additional indebtedness and liens, as well as usual and customary events of default for revolving credit facilities of this nature. The facility size is subject to availability under the borrowing base, which is based on the amount of CCAP SPV’s assets from time to time, and satisfaction of certain conditions, including certain concentration limits
Deferred financing costs, net										$ 4,614,000	2,110,000
SMBC Corporate Revolving Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Committed				$ 385,000,000						$ 385,000,000	350,000,000
Line of credit facility, interest rate description										adjusted SOFR plus 1.875% or 2.000%
Unused facility fees				0.375%
Deferred financing costs, net										$ 1,721,000	$ 2,217,000
Line of credit facility, maturity date				Oct. 27, 2026
Ally Corporate Revolving Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Committed								$ 200,000,000
Line of credit facility, interest rate description										LIBOR plus a 2.35% margin with no LIBOR floor
Line of credit facility, maturity date								Oct. 27, 2021
Debt instrument, aggregate principal amount															$ 149,904,000		$ 104,754,000
Debt instrument, offering date								Aug. 20, 2019
Ally Corporate Revolving Facility | LIBOR
Debt Instrument [Line Items]
Interest Rate, Floor								2.35%
Minimum | InterNotes
Debt Instrument [Line Items]
Debt instrument, interest rate							6.25%
Debt instrument, maturity date							Feb. 15, 2021
Minimum | SMBC Corporate Revolving Facility | LIBOR
Debt Instrument [Line Items]
Interest Rate, Floor				1.875%
Maximum | InterNotes
Debt Instrument [Line Items]
Debt instrument, interest rate							6.75%
Debt instrument, maturity date							Apr. 15, 2022
Maximum | SMBC Corporate Revolving Facility | SOFR
Debt Instrument [Line Items]
Interest Rate, Floor				2.00%

[1] As of December 31, 2023 and 2022, the fair value of the Series 2021A Unsecured Notes was approximately $128,296 and $123,223, respectively.

[2] As of December 31, 2023, the fair value of the FCRX Unsecured Notes was approximately $104,458.

[3] As of December 31, 2023, the fair value of the Series 2023A Unsecured Notes was approximately $51,986.