SECURITIES - Weighted Average Life (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Estimated Fair Value
Total	[1]	$ 104,993,271	$ 92,623,788	[2]
Amortized Cost
Total		105,471,037	94,853,660
Residential Investments
Estimated Fair Value
Less than one year		13,863	13,447
Greater than one year through five years		16,081,685	11,710,172
Greater than five years through ten years		87,693,108	80,202,479
Greater than ten years		1,029,384	540,932
Total		104,818,040	92,467,030
Amortized Cost
Less than one year		14,032	13,670
Greater than one year through five years		16,091,945	11,928,973
Greater than five years through ten years		88,181,059	82,218,464
Greater than ten years		1,012,025	536,594
Total		$ 105,299,061	$ 94,697,701

[1] (3) Excludes $273.4 million and $83.6 million at March 31, 2019 and December 31, 2018, respectively, of non-Agency mortgage-backed securities and $246.6 million and $224.3 million at March 31, 2019 and December 31, 2018, respectively, of commercial mortgage-backed securities in consolidated VIEs pledged as collateral and eliminated from the Company’s Consolidated Statements of Financial Condition.

[2] (1) Derived from the audited consolidated financial statements at December 31, 2018.