Liability for Losses Under Representations and Warranties (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
During the period:
Balance at beginning of year	$ 32,421	$ 43,521
Provision for losses on loans sold resulting from sales of loans	1,735	4,054
Provision for losses on loans sold resulting from change in estimate	(1,445)	(3,169)
Losses incurred, net	(1,608)	(1,612)
Balance at end of year	31,103	42,794
Unpaid principal balance of loans subject to representations and warranties at end of period	$ 303,983,805	$ 271,146,169