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
Jun. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Less than or equal to 1 year $ 186,365  
Greater than 1 year and less than or equal to 3 years 65,957  
Greater than 3 years and less than or equal to 5 years 7,833,269  
Greater than 5 years and less than or equal to 10 years 9,586,926  
Greater than 10 years 772  
Available-for-sale securities, at fair value 17,673,289 $ 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 186,336  
Greater than 1 year and less than or equal to 3 years 53,093  
Greater than 3 years and less than or equal to 5 years 7,828,825  
Greater than 5 years and less than or equal to 10 years 9,581,083  
Greater than 10 years 772  
Available-for-sale securities, at fair value 17,650,109 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 29  
Greater than 1 year and less than or equal to 3 years 12,864  
Greater than 3 years and less than or equal to 5 years 4,444  
Greater than 5 years and less than or equal to 10 years 5,843  
Greater than 10 years 0  
Available-for-sale securities, at fair value $ 23,180 $ 3,628,273