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Other Debt - Schedule of Activity and Effective Interest Rate (Details) - Warehouse and Repurchase Facilities - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]        
Average outstanding balance $ 182,383 $ 22,306 $ 154,297 $ 204,110
Highest outstanding balance at any month-end $ 259,744 $ 19,823 $ 281,690 $ 450,194
Effective interest rate 5.19% 12.61% 5.56% 4.99%