Borrowings - SBA Debentures Interest Expense and Average Outstanding Balance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 743	$ 763
Cash paid for interest expense			$ 6,993	$ 8,390
Effective interest rate	6.21%	6.45%	6.25%	6.36%
Average outstanding balance	$ 248,305	$ 255,241	$ 248,496	$ 273,102
SBA Debentures | Debentures
Debt Instrument [Line Items]
Stated interest expense	0	0	0	151
Amortization of debt issuance costs	0	0	0	20
Total interest and debt financing costs	0	0	0	171
Cash paid for interest expense	$ 0	$ 0	$ 0	$ 457
Effective interest rate	0.00%	0.00%	0.00%	3.25%
Average outstanding balance	$ 0	$ 0	$ 0	$ 10,523