Guarantees - Changes from credit recourses agreements (Details) - Guarantee on loans sold or serviced with credit recourse - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Guarantor Obligations
Balance as of beginning of period	$ 6,223	$ 9,095	$ 6,897	$ 11,800
Provision (benefit) for recourse liability	228	(1,718)	52	(2,067)
Net charge-offs	(54)	(184)	(552)	(2,540)
Balance as of end of period	$ 6,397	$ 7,193	$ 6,397	$ 7,193