Liability for Losses Under Representations and Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
During the period:
Balance at beginning of year	$ 43,521	$ 32,688	$ 21,446
Provision for losses on loans sold resulting from sales of loans	9,617	31,590	21,035
Provision for losses on loans sold resulting from change in estimate	(8,451)	(16,037)	(8,667)
Losses incurred, net	(12,266)	(4,720)	(1,126)
Balance at end of year	32,421	43,521	32,688
Unpaid principal balance of loans subject to representations and warranties at end of period	$ 296,774,121	$ 257,369,777	$ 210,222,447