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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Guarantor Obligations
Balance as of beginning of period	$ 9,095	$ 15,662	$ 11,800	$ 22,484
Provision (benefit) for recourse liability	(1,718)	(1,959)	(2,067)	(2,710)
Net charge-offs	(184)	(1,052)	(2,540)	(7,123)
Balance as of end of period	$ 7,193	$ 12,651	$ 7,193	$ 12,651