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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Percent of remaining principal allowed to buy back under GNMA optional repurchase programs     100.00%    
Mortgage Loans          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Net (losses) gains from fair value changes of mortgage loans held for sale recorded in income $ 4,671 $ 9,730 $ (12,203) $ (10,986)  
GNMA          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Delinquent GNMA loans that had been previously sold 24,480   24,480   $ 94,648
Level 3 | Non-recurring Basis          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Amortized costs of collateral dependent loans $ 2,537   $ 2,537   $ 5,781