Finance Receivables - Schedule of Nonaccrual and Performing Finance Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	$ 231,861	$ 289,009
Allowance for credit losses	(8,785)	(11,249)	$ (13,198)	$ (13,901)
Total carrying value	223,076	277,760
Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	219,042	224,073
Allowance for credit losses	(6,862)	(7,158)	(9,278)	(9,731)
Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	12,819	64,936
Allowance for credit losses	(1,923)	(4,091)	$ (3,920)	$ (4,170)
Nonaccrual
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	12,819	14,830
Allowance for credit losses	(1,923)	(2,075)
Total carrying value	10,896	12,755
Nonaccrual | Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	0	1,000
Nonaccrual | Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	12,819	13,830
Performing
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	219,042	274,179
Allowance for credit losses	(6,862)	(9,174)
Total carrying value	212,180	265,005
Performing | Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	219,042	223,073
Performing | Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	$ 0	$ 51,106