Liability for Losses Under Representations and Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
During the period:
Balance at beginning of period	$ 42,794	$ 38,428	$ 43,521	$ 32,688
Provision for losses on loans sold resulting from sales of loans	2,182	10,304	6,236	20,357
Provision for losses on loans sold reduction in liability due to change in estimate	(2,227)	(3,640)	(5,396)	(7,325)
Losses incurred, net	(3,413)	(757)	(5,025)	(1,385)
Balance at end of period	39,336	44,335	39,336	44,335
Unpaid principal balance of loans subject to representations and warranties at end of period	$ 278,793,884	$ 234,327,924	$ 278,793,884	$ 234,327,924