Liability for Losses Under Representations and Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
During the year:
Balance at beginning of period	$ 23,202	$ 17,982	$ 21,446	$ 21,155
Provision for losses on loans sold resulting from sales of loans	4,189	1,647	7,901	2,714
Provision for losses on loans sold reduction in liability due to change in estimate	(1,270)	(920)	(2,946)	(5,130)
Losses incurred, net	(212)		(492)	(30)
Balance at end of period	25,909	18,709	25,909	18,709
Unpaid principal balance of loans subject to representations and warranties at end of year	$ 192,064,630	$ 127,670,206	$ 192,064,630	$ 127,670,206