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Repurchase Agreements - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
counterparty
Mar. 31, 2023
Jun. 30, 2023
USD ($)
counterparty
Dec. 31, 2022
USD ($)
counterparty
Jun. 30, 2022
USD ($)
Assets Sold under Agreements to Repurchase [Line Items]          
Cash and cash equivalents $ 232,497,000   $ 232,497,000 $ 244,718,000 $ 407,104,000
Repurchase agreements, number of counterparties | counterparty 1   1    
Financings under repurchase agreements, aggregate outstanding balance $ 294,400,000   $ 294,400,000    
Number of counterparties with amounts outstanding under repurchase agreements | counterparty 4   4 1  
Interest rate caps          
Assets Sold under Agreements to Repurchase [Line Items]          
Repurchase agreements, number of counterparties | counterparty 1   1    
Interest rate 4.10%   4.10%    
Notional Amount $ 111,000,000   $ 111,000,000    
Fair value of the interest rate cap contract 1,700,000   1,700,000 $ 1,500,000  
Unrealized losses (700,000)   (600,000)    
Repurchase agreements          
Assets Sold under Agreements to Repurchase [Line Items]          
Cash and cash equivalents 223,100,000   223,100,000    
Securities borrowed $ 205,442,000   $ 205,442,000    
Weighted average advance rate 89.90%   89.90% 30.00%  
Average interest rate haircut 10.10%   10.10% 70.00%  
Average days to maturity   9 days 52 days    
Weighted average interest rate 5.48%   5.48% 5.28%  
Accrued interest payable $ 4,000,000   $ 4,000,000 $ 600,000  
Repurchase agreements | Residential loans          
Assets Sold under Agreements to Repurchase [Line Items]          
Securities borrowed 245,900,000   245,900,000    
Repurchase agreements | Agency RMBS          
Assets Sold under Agreements to Repurchase [Line Items]          
Securities borrowed $ 37,828,000   $ 37,828,000    
Average interest rate haircut 4.40%   4.40%    
Repurchase agreements | Non-Agency RMBS          
Assets Sold under Agreements to Repurchase [Line Items]          
Securities borrowed $ 137,217,000   $ 137,217,000    
Average interest rate haircut 46.10%   46.10%    
Atlas SP          
Assets Sold under Agreements to Repurchase [Line Items]          
Repurchase agreement percentage at risk 7.18%   7.18%    
Bank of America          
Assets Sold under Agreements to Repurchase [Line Items]          
Repurchase agreement percentage at risk 6.06%   6.06%