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Business Segment Reporting - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Segment Reporting Information [Line Items]    
MSR valuation adjustments, net $ (62,632) $ (21,208)
Interest expense 37,875 28,452
Revenues 231,563 207,594
Income (loss) before income taxes 61,325 11,639
Restatement Adjustment    
Segment Reporting Information [Line Items]    
MSR valuation adjustments, net 3,600 0
Interest expense 10,200  
Restatement Adjustment | Servicing    
Segment Reporting Information [Line Items]    
Interest expense 9,900 $ 1,500
Restatement Adjustment | Originations    
Segment Reporting Information [Line Items]    
Interest expense $ 300