Other Assets and Liabilities - Schedule of Amortization Period and Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Intangible Assets at Acquisition	$ 94,600	$ 94,600
Accumulated amortization	(75,551)	(66,138)
Carrying value	$ 19,049	$ 28,462
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	(37,635)	(29,591)
Carrying value	$ 18,665	$ 26,709
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)	(17,497)
Carrying value	$ 0	$ 603
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	(11,083)	(10,450)
Carrying value	$ 317	$ 950
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	(4,333)	(4,200)
Carrying value	$ 67	$ 200
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)
Carrying value	$ 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)
Carrying value	$ 0	$ 0
Weighted Average Amortization Period (in years)	1 year	1 year