SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Derivatives (Details) - Swap [Member] - Interest Rate Swap [Member] $ in Millions	Mar. 31, 2021 USD ($) InterestRateSwap	Dec. 31, 2020 USD ($)
Derivatives [Abstract]
Number of freestanding interest rate swaps \| InterestRateSwap	2
Notional amount of agreements	$ 147.5	$ 156.4
Derivative asset fair value	3.8	4.2
Derivative liability fair value	$ 3.8	$ 4.2

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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- Definition

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

+ References

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

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- Definition

The number of derivative instruments of a particular group held by the entity.

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