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Fair Value of Financial Instruments - Schedule of Reconciliation of Loans Receivable at Fair Value Using Significant Unobservable Inputs (Details) - Loans receivable at fair value - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance – beginning of period	$ 2,778,523	$ 2,962,352
Principal disbursements	659,398	584,162
Principal and interest payments from members	(581,607)	(596,033)
Other loan sales	0	(34,857)
Gross charge-offs	(98,197)	(103,037)
Net increase (decrease) in fair value	12,369	28,938
Balance – end of period	$ 2,770,486	$ 2,841,525

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- Definition

Amount of write-offs of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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