Quarterly report pursuant to Section 13 or 15(d)

Schedule of Available-for-sale Securities Reconciliation (Details)

v3.21.1
Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Jan. 01, 2020
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face $ 16,153,145 $ 18,848,276    
Unamortized Premium 895,092 937,537    
Accretable Purchase Discount (1,796) (50)    
Amortized Cost 11,067,188 14,043,175   $ 30,700,000
Allowance for Credit Losses (18,170) (22,528) $ (41,390) (244,876)
Unrealized Gain 473,287 644,868    
Unrealized Loss (48,915) (14,593)    
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]        
Principal/Current Face 14,552,268 16,752,911    
Unamortized Premium 879,779 921,129    
Accretable Purchase Discount (13) (14)    
Amortized Cost 11,050,115 14,024,470    
Allowance for Credit Losses (16,699) (17,889) (32,786) 0
Unrealized Gain 471,841 644,759    
Unrealized Loss (41,086) (13,449)    
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]        
Principal/Current Face 1,600,877 2,095,365    
Unamortized Premium 15,313 16,408    
Accretable Purchase Discount (1,783) (36)    
Amortized Cost 17,073 18,705    
Allowance for Credit Losses (1,471) (4,639) $ (8,604) $ (244,876)
Unrealized Gain 1,446 109    
Unrealized Loss (7,829) (1,144)    
Available-for-sale securities, at fair value 9,219 13,031    
Fixed Income Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 10,170,349 13,103,355    
Unamortized Premium 456,318 605,253    
Accretable Purchase Discount (13) (14)    
Amortized Cost 10,626,654 13,708,594    
Allowance for Credit Losses 0 0    
Unrealized Gain 393,005 629,079    
Unrealized Loss (32,355) (420)    
Available-for-sale securities, at fair value 10,987,304 14,337,253    
Interest-Only-Strip [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 4,381,919 3,649,556    
Unamortized Premium 423,461 315,876    
Accretable Purchase Discount 0 0    
Amortized Cost 423,461 315,876    
Allowance for Credit Losses (16,699) (17,889)    
Unrealized Gain 78,836 15,680    
Unrealized Loss (8,731) (13,029)    
Available-for-sale securities, at fair value $ 476,867 $ 300,638