Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Available-for-Sale Securities, Weighted Average Life Classifications (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year $ 6,391  
Greater than 1 year and less than or equal to 3 years 100,946  
Greater than 3 years and less than or equal to 5 years 1,482,174  
Greater than 5 years and less than or equal to 10 years 9,846,589  
Greater than 10 years 37,290  
Available-for-sale securities, at fair value 11,473,390 $ 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 5,155  
Greater than 1 year and less than or equal to 3 years 92,963  
Greater than 3 years and less than or equal to 5 years 1,482,174  
Greater than 5 years and less than or equal to 10 years 9,846,589  
Greater than 10 years 37,290  
Available-for-sale securities, at fair value 11,464,171 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 1,236  
Greater than 1 year and less than or equal to 3 years 7,983  
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 $ 9,219 $ 13,031