Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value (Details)

v3.23.1
Available-for-Sale Securities, at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value $ 8,960,820 $ 7,778,734
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value 4,968,798 4,112,556
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value 3,615,921 3,332,314
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value 75,975 208,706
Federal Home Loan Bank Certificates and Obligations (FHLB)    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value 172,846 0
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Available-for-sale securities, at fair value $ 127,280 $ 125,158