Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Nonrecurring Basis (Details)

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Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Nonrecurring Basis (Details) - Non-Recurring Fair Value Measurements - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Assets:    
Ginnie Mae loans subject to repurchase right $ 628,157 $ 728,978
Liabilities:    
Ginnie Mae loans subject to repurchase right 628,815 729,260
Ginnie Mae    
Assets:    
Ginnie Mae loans subject to repurchase right 628,157 728,978
Liabilities:    
Ginnie Mae loans subject to repurchase right 628,815 729,260
Level 1    
Assets:    
Ginnie Mae loans subject to repurchase right 0 0
Liabilities:    
Ginnie Mae loans subject to repurchase right 0 0
Level 1 | Ginnie Mae    
Assets:    
Ginnie Mae loans subject to repurchase right 0 0
Liabilities:    
Ginnie Mae loans subject to repurchase right 0 0
Level 2    
Assets:    
Ginnie Mae loans subject to repurchase right 628,157 728,978
Liabilities:    
Ginnie Mae loans subject to repurchase right 628,815 729,260
Level 2 | Ginnie Mae    
Assets:    
Ginnie Mae loans subject to repurchase right 628,157 728,978
Liabilities:    
Ginnie Mae loans subject to repurchase right 628,815 729,260
Level 3    
Assets:    
Ginnie Mae loans subject to repurchase right 0 0
Liabilities:    
Ginnie Mae loans subject to repurchase right 0 0
Level 3 | Ginnie Mae    
Assets:    
Ginnie Mae loans subject to repurchase right 0 0
Liabilities:    
Ginnie Mae loans subject to repurchase right $ 0 $ 0