TWO Quarterly report pursuant to Section 13 or 15(d)

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

Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	$ 35,967,853	$ 34,389,050
Unamortized Premium	1,206,004	1,338,210
Accretable Purchase Discount	462,994	719,204
Credit Reserve Purchase Discount	1,723,638	1,322,762
Amortized Cost	27,564,958	25,432,158
Unrealized Gain	832,002	557,048
Unrealized Loss	78,402	436,602
Available-for-sale securities, at fair value	28,318,558	25,552,604
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	26,013,728	23,891,757
Unamortized Premium	1,115,550	1,247,682
Accretable Purchase Discount	21	25,085
Credit Reserve Purchase Discount	0	0
Amortized Cost	24,371,348	21,998,387
Unrealized Gain	447,373	75,298
Unrealized Loss	52,538	388,652
Available-for-sale securities, at fair value	24,766,183	21,685,033
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	9,954,125	10,497,293
Unamortized Premium	90,454	90,528
Accretable Purchase Discount	462,973	694,119
Credit Reserve Purchase Discount	1,723,638	1,322,762
Amortized Cost	3,193,610	3,433,771
Unrealized Gain	384,629	481,750
Unrealized Loss	25,864	47,950
Available-for-sale securities, at fair value	3,552,375	3,867,571
Interest-Only-Strip [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	2,757,909	3,115,967
Unamortized Premium	179,769	209,901
Accretable Purchase Discount	0	0
Credit Reserve Purchase Discount	0	0
Amortized Cost	179,769	209,901
Unrealized Gain	15,881	14,170
Unrealized Loss	46,837	48,655
Available-for-sale securities, at fair value	148,813	175,416
Interest-Only-Strip [Member] \| Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	4,664,358	5,137,169
Unamortized Premium	83,037	83,846
Accretable Purchase Discount	0	0
Credit Reserve Purchase Discount	0	0
Amortized Cost	83,037	83,846
Unrealized Gain	4,393	3,655
Unrealized Loss	8,338	3,293
Available-for-sale securities, at fair value	79,092	84,208
Fixed Income Securities [Member] \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	23,255,819	20,775,790
Unamortized Premium	935,781	1,037,781
Accretable Purchase Discount	21	25,085
Credit Reserve Purchase Discount	0	0
Amortized Cost	24,191,579	21,788,486
Unrealized Gain	431,492	61,128
Unrealized Loss	5,701	339,997
Available-for-sale securities, at fair value	24,617,370	21,509,617
Fixed Income Securities [Member] \| Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	5,289,767	5,360,124
Unamortized Premium	7,417	6,682
Accretable Purchase Discount	462,973	694,119
Credit Reserve Purchase Discount	1,723,638	1,322,762
Amortized Cost	3,110,573	3,349,925
Unrealized Gain	380,236	478,095
Unrealized Loss	17,526	44,657
Available-for-sale securities, at fair value	$ 3,473,283	$ 3,783,363