Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face $ 21,755,298     $ 38,696,494
Unamortized Premium 926,989     1,245,069
Accretable Purchase Discount 54     560,159
Credit Reserve Purchase Discount       1,711,951
Amortized Cost 17,030,405     30,711,157
Allowance for Credit Losses (42,583) $ (41,390) $ (244,876) 0
Unrealized Gain 703,210     783,164
Unrealized Loss 17,743     87,993
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]        
Principal/Current Face 18,445,084     28,841,237
Unamortized Premium 890,932     1,156,154
Accretable Purchase Discount 14     19
Credit Reserve Purchase Discount       0
Amortized Cost 16,991,873     27,395,679
Allowance for Credit Losses (30,634) 32,786 0  
Unrealized Gain 702,906     438,542
Unrealized Loss 14,036     56,166
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]        
Principal/Current Face 3,310,214     9,855,257
Unamortized Premium 36,057     88,915
Accretable Purchase Discount 40     560,140
Credit Reserve Purchase Discount       1,711,951
Amortized Cost 38,532     3,315,478
Allowance for Credit Losses (11,949) $ 8,604 $ 244,876  
Unrealized Gain 304     344,622
Unrealized Loss 3,707     31,827
Available-for-sale securities, at fair value 23,180     3,628,273
Interest-Only-Strip [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 2,344,129     2,601,693
Unamortized Premium 148,131     169,811
Accretable Purchase Discount 0     0
Credit Reserve Purchase Discount       0
Amortized Cost 148,131     169,811
Allowance for Credit Losses (30,634)      
Unrealized Gain 14,474     13,724
Unrealized Loss 13,754     47,351
Available-for-sale securities, at fair value 118,217     136,184
Interest-Only-Strip [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 3,307,699     4,356,603
Unamortized Premium 36,049     79,935
Accretable Purchase Discount 0     0
Credit Reserve Purchase Discount       0
Amortized Cost 36,049     79,935
Allowance for Credit Losses (11,949)      
Unrealized Gain 179     3,039
Unrealized Loss 3,707     8,564
Available-for-sale securities, at fair value 20,572     74,410
Fixed Income Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 16,100,955     26,239,544
Unamortized Premium 742,801     986,343
Accretable Purchase Discount 14     19
Credit Reserve Purchase Discount       0
Amortized Cost 16,843,742     27,225,868
Allowance for Credit Losses 0      
Unrealized Gain 688,432     424,818
Unrealized Loss 282     8,815
Available-for-sale securities, at fair value 17,531,892     27,641,871
Fixed Income Securities [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 2,515     5,498,654
Unamortized Premium 8     8,980
Accretable Purchase Discount 40     560,140
Credit Reserve Purchase Discount       1,711,951
Amortized Cost 2,483     3,235,543
Allowance for Credit Losses 0      
Unrealized Gain 125     341,583
Unrealized Loss 0     23,263
Available-for-sale securities, at fair value $ 2,608     $ 3,553,863