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Debt - Schedule of SBA Debenture Outstanding (Details) - USD ($)		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Debt instrument, par amount	[1]	$ 1,040,842,703	$ 1,126,314,826	$ 988,555,830	$ 949,062,241	$ 1,019,339,449
SBA Debentures
Debt Instrument [Line Items]
Debt instrument, par amount		$ 111,200,000	$ 131,500,000
Debt instrument, interest rate		2.41%	2.45%
SBA Debentures | March 25, 2015
Debt Instrument [Line Items]
Issuance Date			Mar. 25, 2015
Debt instrument, maturity date			Mar. 01, 2025
Debt instrument, par amount			$ 9,500,000
Debt instrument, interest rate			2.52%
SBA Annual Charge			0.36%
SBA Debentures | September 23, 2015
Debt Instrument [Line Items]
Issuance Date			Sep. 23, 2015
Debt instrument, maturity date			Sep. 01, 2025
Debt instrument, par amount			$ 10,800,000
Debt instrument, interest rate			2.83%
SBA Annual Charge			0.36%
SBA Debentures | March 23, 2016
Debt Instrument [Line Items]
Issuance Date		Mar. 23, 2016	Mar. 23, 2016
Debt instrument, maturity date		Mar. 01, 2026	Mar. 01, 2026
Debt instrument, par amount		$ 4,000,000	$ 4,000,000
Debt instrument, interest rate		2.51%	2.51%
SBA Annual Charge		0.36%	0.36%
SBA Debentures | September 21, 2016
Debt Instrument [Line Items]
Issuance Date		Sep. 21, 2016	Sep. 21, 2016
Debt instrument, maturity date		Sep. 01, 2026	Sep. 01, 2026
Debt instrument, par amount		$ 18,200,000	$ 18,200,000
Debt instrument, interest rate		2.05%	2.05%
SBA Annual Charge		0.36%	0.36%
SBA Debentures | September 20, 2017
Debt Instrument [Line Items]
Issuance Date		Sep. 20, 2017	Sep. 20, 2017
Debt instrument, maturity date		Sep. 01, 2027	Sep. 01, 2027
Debt instrument, par amount		$ 14,000,000	$ 14,000,000
Debt instrument, interest rate		2.52%	2.52%
SBA Annual Charge		0.36%	0.36%
SBA Debentures | March 21, 2018
Debt Instrument [Line Items]
Issuance Date		Mar. 21, 2018	Mar. 21, 2018
Debt instrument, maturity date		Mar. 01, 2028	Mar. 01, 2028
Debt instrument, par amount		$ 8,000,000	$ 8,000,000
Debt instrument, interest rate		3.19%	3.19%
SBA Annual Charge		0.35%	0.35%
SBA Debentures | September 19, 2018
Debt Instrument [Line Items]
Issuance Date		Sep. 19, 2018	Sep. 19, 2018
Debt instrument, maturity date		Sep. 01, 2028	Sep. 01, 2028
Debt instrument, par amount		$ 15,000,000	$ 15,000,000
Debt instrument, interest rate		3.55%	3.55%
SBA Annual Charge		0.35%	0.35%
SBA Debentures | September 25, 2019
Debt Instrument [Line Items]
Issuance Date		Sep. 25, 2019	Sep. 25, 2019
Debt instrument, maturity date		Sep. 01, 2029	Sep. 01, 2029
Debt instrument, par amount		$ 40,000,000	$ 40,000,000
Debt instrument, interest rate		2.28%	2.28%
SBA Annual Charge		0.35%	0.35%
SBA Debentures | September 22, 2021
Debt Instrument [Line Items]
Issuance Date		Sep. 22, 2021	Sep. 22, 2021
Debt instrument, maturity date		Sep. 01, 2031	Sep. 01, 2031
Debt instrument, par amount		$ 12,000,000	$ 12,000,000
Debt instrument, interest rate		1.30%	1.30%
SBA Annual Charge		0.35%	0.35%
[1] Excludes unamortized debt issuance costs which are netted in the Consolidated Statements of Assets and Liabilities.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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