SECURITIES - Weighted Average Life (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Estimated Fair Value
Total	[1]	$ 114,833,580	$ 92,623,788
Amortized Cost
Total		112,863,385	94,853,660
Residential Investments
Estimated Fair Value
Less than one year		3,997	13,447
Greater than one year through five years		36,290,254	11,710,172
Greater than five years through ten years		77,732,756	80,202,479
Greater than ten years		533,550	540,932
Total		114,560,557	92,467,030
Amortized Cost
Less than one year		4,543	13,670
Greater than one year through five years		35,581,833	11,928,973
Greater than five years through ten years		76,504,845	82,218,464
Greater than ten years		506,719	536,594
Total		$ 112,597,940	$ 94,697,701

[1] Excludes $102.5 million and $0 at December 31, 2019 and 2018, respectively, of agency mortgage-backed securities, $468.0 million and $83.6 million at December 31, 2019 and 2018, respectively, of non-Agency mortgage-backed securities and $500.3 million and $224.3 million at December 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.