PENSION PLAN - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) installment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	May 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Pension expense	$ 300	$ 300	$ 300
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.50%	3.24%	4.23%	4.46%
Benefit obligation	$ 12,715	$ 11,435	$ 9,416
Estimated net loss (gain) expected to be amortized from accumulated other comprehensive income into net periodic cost	$ 500
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%
Benefit obligation	$ 1,800
Number of equal consecutive installments | installment	180
Consecutive installments, amount	$ 10
Accrued liability	1,200	800
Service cost	$ 200	$ 400