Debt - Schedule of Total Debt Outstanding and Available (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Line Of Credit Facility [Line Items]
Carrying Value	$ 949,062,241	$ 1,019,339,450
Available	286,110,020	355,520,456
Total Capacity	1,235,172,261	1,374,859,906
Unamortized issuance costs	(5,056,427)	(6,878,110)
Debt, net of unamortized issuance costs	$ 944,005,814	$ 1,012,461,340
Operating Facility
Line Of Credit Facility [Line Items]
Maturity	2026	2026
Rate	1.75%	1.75%
Carrying Value	$ 123,889,980	$ 154,479,544
Available	176,110,020	145,520,456
Total Capacity	$ 300,000,000	$ 300,000,000
Funding Facility II
Line Of Credit Facility [Line Items]
Maturity	2025	2025
Rate	2.00%	2.00%
Carrying Value	$ 100,000,000	$ 0
Available	100,000,000	200,000,000
Total Capacity	$ 200,000,000	$ 200,000,000
SBA Debentures
Line Of Credit Facility [Line Items]
Rate	2.52%	2.52%
Carrying Value	$ 150,000,000	$ 150,000,000
Available	10,000,000	10,000,000
Total Capacity	$ 160,000,000	$ 160,000,000
SBA Debentures \| Minimum
Line Of Credit Facility [Line Items]
Maturity	2024	2024
SBA Debentures \| Maximum
Line Of Credit Facility [Line Items]
Maturity	2031	2031
2024 Notes
Line Of Credit Facility [Line Items]
Maturity	2024	2024
Rate	3.90%	3.90%
Carrying Value	$ 248,997,527	$ 248,423,170
Available	0	0
Total Capacity	$ 248,997,527	$ 248,423,170
2026 Notes
Line Of Credit Facility [Line Items]
Maturity	2026	2026
Rate	2.85%	2.85%
Carrying Value	$ 326,174,734	$ 326,549,826
Available	0	0
Total Capacity	$ 326,174,734	$ 326,549,826
2022 Convertible Notes
Line Of Credit Facility [Line Items]
Maturity		2022
Rate		4.625%
Carrying Value		$ 139,886,910
Available		0
Total Capacity		$ 139,886,910

Debt instrument maturity year.

No definition available.

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- Definition

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

+ References

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

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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- Definition

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.

+ References

No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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