Commitments and Contingencies - Activity in the Repurchase Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Commitments and Contingencies [Roll Forward]
Balance at beginning of period	$ 3,445	$ 5,489	$ 4,802	$ 5,928
Provision for loan repurchases or indemnifications	(800)	0	(1,989)	(266)
Losses on loans repurchased or indemnified	16	(120)	(152)	(293)
Balance at end of period	$ 2,661	$ 5,369	$ 2,661	$ 5,369