DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES - Fair Value and Notional Amounts (Details)	Dec. 31, 2018	Dec. 31, 2017 USD ($)
Derivatives, Fair Value [Line Items]
Number derivative financial instruments held	0
Derivative Assets
Number of contracts		14,355
Fair value		$ 5,349,613
Notional		$ 14,355,000,000
Derivative Liabilities
Number of contracts		0
Fair value		$ 0
Notional		$ 0
Eurodollar Futures
Derivative Assets
Number of contracts		14,355
Fair value		$ 5,349,613
Notional		$ 14,355,000,000
Derivative Liabilities
Number of contracts		0
Fair value		$ 0
Notional		$ 0

Nominal or face amount used to calculate payments on the derivative asset.

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-Name Accounting Standards Codification
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