Fair Value of Assets and Liabilities - Additional Information about Servicing Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Servicing Assets, Changes in fair value due to:
Fair value at beginning of period			$ 84,308
Fair value at end of period	$ 85,387		85,387
Fair Value, Measurements, Recurring
Servicing Assets, Changes in fair value due to:
Fair value at beginning of period	89,241	$ 72,112	84,308	$ 67,726
Issuances	13,576	29,090	27,701	51,455
Change in fair value, included in Marketplace revenue	(17,074)	(21,034)	(29,650)	(38,013)
Other net changes	(356)	(741)	3,028	(1,741)
Fair value at end of period	$ 85,387	$ 79,427	$ 85,387	$ 79,427