Annual report pursuant to Section 13 and 15(d)

Available-for-Sale Securities, Weighted Average Life Classifications (Details)

v3.20.4
Available-for-Sale Securities, Weighted Average Life Classifications (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year $ 4,387  
Greater than 1 year and less than or equal to 3 years 173,242  
Greater than 3 years and less than or equal to 5 years 12,858,812  
Greater than 5 years and less than or equal to 10 years 1,613,723  
Greater than 10 years 758  
Available-for-sale securities, at fair value 14,650,922 $ 31,406,328
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year 1,615  
Greater than 1 year and less than or equal to 3 years 162,983  
Greater than 3 years and less than or equal to 5 years 12,858,812  
Greater than 5 years and less than or equal to 10 years 1,613,723  
Greater than 10 years 758  
Available-for-sale securities, at fair value 14,637,891 27,778,055
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year 2,772  
Greater than 1 year and less than or equal to 3 years 10,259  
Greater than 3 years and less than or equal to 5 years 0  
Greater than 5 years and less than or equal to 10 years 0  
Greater than 10 years 0  
Available-for-sale securities, at fair value $ 13,031 $ 3,628,273