Liability for Losses Under Representations and Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
During the period:
Balance at beginning of period	$ 39,336	$ 44,335	$ 43,521	$ 32,688
Provision for losses on loans sold resulting from sales of loans	1,651	6,561	7,887	26,918
Provision for losses on loans sold reduction in liability due to change in estimate	(1,769)	(4,355)	(7,165)	(11,680)
Losses incurred, net	(2,031)	(735)	(7,056)	(2,120)
Balance at end of period	37,187	45,806	37,187	45,806
Unpaid principal balance of loans subject to representations and warranties at end of period	$ 285,532,190	$ 245,528,045	$ 285,532,190	$ 245,528,045