Other Assets and Liabilities - Schedule of Amortization Period and Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 94,600	$ 94,600
Accumulated amortization	(83,977)	(75,551)
Total Future Intangible Asset Amortization	$ 10,623	$ 19,049
Weighted Average Amortization Period (in years)	6 years	6 years
Borrower network
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 56,300	$ 56,300
Accumulated amortization	(45,677)	(37,635)
Total Future Intangible Asset Amortization	$ 10,623	$ 18,665
Weighted Average Amortization Period (in years)	7 years	7 years
Broker network
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 18,100	$ 18,100
Accumulated amortization	(18,100)	(18,100)
Total Future Intangible Asset Amortization	$ 0	$ 0
Weighted Average Amortization Period (in years)	5 years	5 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 11,400	$ 11,400
Accumulated amortization	(11,400)	(11,083)
Total Future Intangible Asset Amortization	$ 0	$ 317
Weighted Average Amortization Period (in years)	3 years	3 years
Tradenames
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 4,400	$ 4,400
Accumulated amortization	(4,400)	(4,333)
Total Future Intangible Asset Amortization	$ 0	$ 67
Weighted Average Amortization Period (in years)	3 years	3 years
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 1,800	$ 1,800
Accumulated amortization	(1,800)	(1,800)
Total Future Intangible Asset Amortization	$ 0	$ 0
Weighted Average Amortization Period (in years)	2 years	2 years
Loan administration fees on existing loan assets
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 2,600	$ 2,600
Accumulated amortization	(2,600)	(2,600)
Total Future Intangible Asset Amortization	$ 0	$ 0
Weighted Average Amortization Period (in years)	1 year	1 year