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Business Segment Reporting - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Segment Reporting Information [Line Items]        
MSR valuation adjustments, net $ (95,159) $ 6,320 $ (190,989) $ 57,562
Interest expense $ 50,395 40,623 $ 126,131 102,591
Restatement Adjustment        
Segment Reporting Information [Line Items]        
MSR valuation adjustments, net   (1,500)   (1,500)
Interest expense   7,500   14,900
Restatement Adjustment | Servicing        
Segment Reporting Information [Line Items]        
Interest expense   7,300   14,700
Restatement Adjustment | Originations        
Segment Reporting Information [Line Items]        
Interest expense   $ 200   $ 200