Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Available-for-Sale Securities, Weighted Average Life Classifications (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year $ 5,466  
Greater than 1 year and less than or equal to 3 years 230,245  
Greater than 3 years and less than or equal to 5 years 14,444,913  
Greater than 5 years and less than or equal to 10 years 1,892,932  
Greater than 10 years 765  
Available-for-sale securities, at fair value 16,574,321 $ 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 2,316  
Greater than 1 year and less than or equal to 3 years 215,402  
Greater than 3 years and less than or equal to 5 years 14,444,913  
Greater than 5 years and less than or equal to 10 years 1,892,932  
Greater than 10 years 765  
Available-for-sale securities, at fair value 16,556,328 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 3,150  
Greater than 1 year and less than or equal to 3 years 14,843  
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 $ 17,993 $ 3,628,273