Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Available-for-Sale Securities, Weighted Average Life Classifications (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year $ 12,989  
Greater than 1 year and less than or equal to 3 years 104,832  
Greater than 3 years and less than or equal to 5 years 4,158,698  
Greater than 5 years and less than or equal to 10 years 2,387,194  
Greater than 10 years 1,031  
Available-for-sale securities, at fair value 6,664,744 $ 14,650,922
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year 4,816  
Greater than 1 year and less than or equal to 3 years 104,832  
Greater than 3 years and less than or equal to 5 years 4,158,698  
Greater than 5 years and less than or equal to 10 years 2,387,194  
Greater than 10 years 1,031  
Available-for-sale securities, at fair value 6,656,571 14,637,891
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year 8,173  
Greater than 1 year and less than or equal to 3 years 0  
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 $ 8,173 $ 13,031