DERIVATIVE INSTRUMENTS - Interest Rate Swap Agreements (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Derivative disclosures
Fair value of asset derivatives	$ 4,305,000	$ 3,350,000
LIBOR
Derivative disclosures
Variable interest rate (as a percent)	435.00%
Interest rate swap contracts
Derivative disclosures
Notional amount of interest rate swaps	$ 8,800,000	9,000,000.0
Interest rate swap contracts \| Other assets
Derivative disclosures
Fair value of asset derivatives	$ 888,000	$ 306,000

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Nominal or face amount used to calculate payment on derivative.

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