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Debt - Mortgage Loans Narrative (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2023
USD ($)
loan
property
extension
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
property
Debt Instrument [Line Items]      
Gross book value $ 21,512,721   $ 20,700,935
Investments in single-family residential properties, net 17,400,036   17,030,374
Investments in debt securities, net 86,617   86,980
Mandatory prepayments 15,196 $ 849,712  
Level 2      
Debt Instrument [Line Items]      
Investments in debt securities, net $ 86,617   $ 86,980
Mortgage Loans      
Debt Instrument [Line Items]      
Extension term 1 year    
Debt instrument, loan principal as a percentage of mortgage pool 5.00%    
Mandatory prepayments $ 15,196 $ 849,712  
Mortgage Loans | Residential Real Estate      
Debt Instrument [Line Items]      
Number of real estate properties | property 10,617   10,712
Gross book value $ 2,350,078   $ 2,355,083
Investments in single-family residential properties, net $ 1,799,650   $ 1,859,614
Mortgage Loans | IH 2018-1, IH 2018-2, IH 2018-3, IH 2018-4      
Debt Instrument [Line Items]      
Number of components | loan 6    
Extension term 1 year    
Mortgage Loans | IH 2018-1, IH 2018-2, IH 2018-3, IH 2018-4 | Minimum      
Debt Instrument [Line Items]      
Initial term 2 years    
Mortgage Loans | IH 2018-1, IH 2018-2, IH 2018-3, IH 2018-4 | Maximum      
Debt Instrument [Line Items]      
Number of extensions | extension 5    
Mortgage Loans | IH1 2017-1      
Debt Instrument [Line Items]      
Number of components | loan 2    
Debt instrument term 10 years    
Fixed interest rate 4.23%    
Mortgage Loans | IH1 2017-1 | Class B Certificates      
Debt Instrument [Line Items]      
Fixed interest rate 4.23%    
Mortgage Loans | IH 2018-4      
Debt Instrument [Line Items]      
Extension term 1 year    
Debt instrument term 2 years    
Mortgage Loans | IH 2018-4 | Each Class Certificates      
Debt Instrument [Line Items]      
Debt instrument, loan principal as a percentage of mortgage pool 5.00%    
Mortgage Loans | IH 2018-4 | Minimum      
Debt Instrument [Line Items]      
Basis spread 1.15%    
Mortgage Loans | IH 2018-4 | Minimum | Secured Overnight Financing Rate      
Debt Instrument [Line Items]      
Basis spread 1.15%    
Mortgage Loans | IH 2018-4 | Maximum      
Debt Instrument [Line Items]      
Number of extensions | extension 5    
Basis spread 1.45%    
Mortgage Loans | IH 2018-4 | Maximum | Secured Overnight Financing Rate      
Debt Instrument [Line Items]      
Basis spread 1.45%