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SECURITIES - Weighted Average Life (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Estimated Fair Value |  |  |  |
Total | [1] | $ 116,094,061 | $ 92,623,788 | [2]
Amortized Cost |  |  |  |
Total |  | 113,858,974 | 94,853,660 |
Total Residential Securities |  |  |  |
Estimated Fair Value |  |  |  |
Less than one year |  | 5,508 | 13,447 |
Greater than one year through five years |  | 58,857,860 | 11,710,172 |
Greater than five years through ten years |  | 57,032,062 | 80,202,479 |
Greater than ten years |  | 57,780 | 540,932 |
Total |  | 115,953,210 | 92,467,030 |
Amortized Cost |  |  |  |
Less than one year |  | 6,454 | 13,670 |
Greater than one year through five years |  | 57,504,374 | 11,928,973 |
Greater than five years through ten years |  | 56,163,913 | 82,218,464 |
Greater than ten years |  | 51,681 | 536,594 |
Total |  | $ 113,726,422 | $ 94,697,701 |
[1] | (3) Excludes $429.1 million and $83.6 million at September 30, 2019 and December 31, 2018, respectively, of non-Agency mortgage-backed securities and $182.3 million and $224.3 million at September 30, 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.

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- Definition The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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