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SECURED FINANCING - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Repurchase Agreements: |  |  |
Netted amounts | $ 72,580,183 | $ 101,740,728 | [1]
Repurchase agreements - weighted average effective borrowing rates | 1.91% | 1.99% |
Repurchase agreements - weighted average remaining maturities | 48 days | 65 days |
Repurchase agreement amount | $ 1,600,000 |  |
Remaining capacity of repurchase agreement | 1,200,000 |  |
Other secured financing long term, amount | 1,805,428 | $ 4,455,700 | [1]
Secured financings and interest rate swaps - collateral held, estimated fair value | 80,000,000 | 112,800,000 |
Secured financings and interest rate swaps - collateral held, accrued interest | $ 254,600 | $ 357,900 |
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 |
FHLB De Moines |  |  |
Repurchase Agreements: |  |  |
Debt weighted average interest rate | 2.04% | 2.16% |
Stock held in FHLB | $ 38,600 | $ 147,900 |
FHLB De Moines | Maturity Period Beyond Three Years | Period One |  |  |
Repurchase Agreements: |  |  |
Other secured financing long term, amount | $ 900,000 | 1,400,000 |
FHLB De Moines | Maturity Period Beyond Three Years | Period Two |  |  |
Repurchase Agreements: |  |  |
Other secured financing long term, amount |  | $ 2,100,000 |
[1] | Derived from the audited consolidated financial statements at December 31, 2019.

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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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