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	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	$ 38,135,044	$ 34,389,050
Unamortized Premium	1,296,739	1,338,210
Accretable Purchase Discount	589,395	719,204
Credit Reserve Purchase Discount	1,640,055	1,322,762
Amortized Cost	29,401,867	25,432,158
Unrealized Gain	872,066	557,048
Unrealized Loss	87,854	436,602
Available-for-sale securities, at fair value	30,186,079	25,552,604
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	27,656,152	23,891,757
Unamortized Premium	1,202,077	1,247,682
Accretable Purchase Discount	24	25,085
Credit Reserve Purchase Discount	0	0
Amortized Cost	25,969,808	21,998,387
Unrealized Gain	406,355	75,298
Unrealized Loss	67,720	388,652
Available-for-sale securities, at fair value	26,308,443	21,685,033
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	10,478,892	10,497,293
Unamortized Premium	94,662	90,528
Accretable Purchase Discount	589,371	694,119
Credit Reserve Purchase Discount	1,640,055	1,322,762
Amortized Cost	3,432,059	3,433,771
Unrealized Gain	465,711	481,750
Unrealized Loss	20,134	47,950
Available-for-sale securities, at fair value	3,877,636	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	2,888,397	3,115,967
Unamortized Premium	188,009	209,901
Accretable Purchase Discount	0	0
Credit Reserve Purchase Discount	0	0
Amortized Cost	188,009	209,901
Unrealized Gain	17,731	14,170
Unrealized Loss	45,975	48,655
Available-for-sale securities, at fair value	159,765	175,416
Interest-Only-Strip [Member] \| Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Principal/Current Face	4,912,069	5,137,169
Unamortized Premium	88,917	83,846
Accretable Purchase Discount	0	0
Credit Reserve Purchase Discount	0	0
Amortized Cost	88,917	83,846
Unrealized Gain	4,530	3,655
Unrealized Loss	2,156	3,293
Available-for-sale securities, at fair value	91,291	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	24,767,755	20,775,790
Unamortized Premium	1,014,068	1,037,781
Accretable Purchase Discount	24	25,085
Credit Reserve Purchase Discount	0	0
Amortized Cost	25,781,799	21,788,486
Unrealized Gain	388,624	61,128
Unrealized Loss	21,745	339,997
Available-for-sale securities, at fair value	26,148,678	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	5,566,823	5,360,124
Unamortized Premium	5,745	6,682
Accretable Purchase Discount	589,371	694,119
Credit Reserve Purchase Discount	1,640,055	1,322,762
Amortized Cost	3,343,142	3,349,925
Unrealized Gain	461,181	478,095
Unrealized Loss	17,978	44,657
Available-for-sale securities, at fair value	$ 3,786,345	$ 3,783,363