Loss Reserves - Default Inventory Reconciliation (Details) - loan	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Primary Default Inventory [Roll Forward]
New Notices	42,988	42,432	106,099
Cures	(48,262)	(64,896)	(76,107)
Paid claims	(1,305)	(1,223)	(2,245)
Rescissions and denials	(35)	(38)	(65)
Other items removed from inventory	(289)	(695)	0
Primary Default Inventory	26,387	33,290	57,710	30,028