Fair Value Measurements - Additional Information about Servicing Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Servicing Assets, Changes in fair value due to:
Fair value at beginning of period	$ 84,308
Fair value at end of period	77,680	$ 84,308
Fair Value, Measurements, Recurring
Servicing Assets, Changes in fair value due to:
Fair value at beginning of period	84,308	67,726
Issuances	56,032	93,352
Change in fair value, included in Marketplace Revenue	(62,581)	(73,229)
Other net changes	(79)	(3,541)
Fair value at end of period	$ 77,680	$ 84,308