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SECURED FINANCING - Additional Information (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Repurchase Agreements: |  |  |
Netted amounts | $ 102,682,104 | $ 81,115,874 | [1]
Repurchase agreements - weighted average effective borrowing rates | 2.24% | 2.36% |
Repurchase agreements - weighted average remaining maturities | 45 days | 77 days |
Repurchase agreement amount | $ 1,100,000 |  |
Remaining capacity of repurchase agreement | 895,400 |  |
Fair value of collateral received in reverse repurchase agreements | 0 | $ 650,000 |
Other secured financing long term, amount | 4,466,030 | 4,183,311 | [1]
Secured financings and interest rate swaps - collateral held, estimated fair value | 113,700,000 | 90,200,000 |
Secured financings and interest rate swaps - collateral held, accrued interest | $ 367,900 | $ 303,100 |
Minimum |  |  |
Repurchase Agreements: |  |  |
Maturity period | 5 years |  |
Maximum |  |  |
Repurchase Agreements: |  |  |
Maturity period | 7 years |  |
Maturity Period Beyond Three Years | Period Two | Minimum |  |  |
Repurchase Agreements: |  |  |
Maturity period | 1 year | 1 year |
Maturity Period Beyond Three Years | Period Two | Maximum |  |  |
Repurchase Agreements: |  |  |
Maturity period | 3 years | 3 years |
FHLB De Moines |  |  |
Repurchase Agreements: |  |  |
Debt weighted average interest rate | 2.48% | 2.78% |
Stock held in FHLB | $ 147,900 | $ 147,900 |
FHLB De Moines | Maturity Period Beyond Three Years | Period One |  |  |
Repurchase Agreements: |  |  |
Other secured financing long term, amount | 90,000 |  |
FHLB De Moines | Maturity Period Beyond Three Years | Period Two |  |  |
Repurchase Agreements: |  |  |
Other secured financing long term, amount | $ 3,500,000 | $ 3,600,000 |
[1] | (1) Derived from the audited consolidated financial statements at December 31, 2018.

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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809 + Details
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