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PENSION PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
PENSION PLAN (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amounts recognized in the consolidated balance sheets [Abstract]
Noncurrent liabilities	$ (4,015)	$ (4,270)
Amounts recognized in accumulated other comprehensive loss [Abstract]
Accumulated loss	(5,648)	(6,428)	$ (6,876)
Deferred income taxes	2,366	2,366	2,366
Accumulated other comprehensive loss	(3,282)	(4,062)	(4,510)
Accumulated benefit obligation	22,800	21,100
COMPONENTS OF NET PERIODIC BENEFIT COST [Abstract]
Service cost	33	28	29
Interest cost	812	755	840
Expected return on plan assets	(1,011)	(1,104)	(1,058)
Recognized net actuarial loss	691	601	850
Net periodic benefit cost	525	280	661
Amortization of estimated net loss, transition obligation and prior service cost from accumulated other comprehensive income into net periodic benefit cost	600
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 18,817	$ 16,835	19,055	$ 17,548
Fair value of total plan assets by major asset category	100.00%	100.00%
Weighted-average assumptions used to determine benefit obligations [Abstract]
Discount rate	2.93%	4.01%
Rate of compensation increase	2.75%	2.50%
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Pension contributions	$ 0	$ 0
Expected benefit payments for the plan [Abstract]
Maximum contribution by employee specified as percentage of compensation	25.00%
Additional contribution by employer	30.00%
Maximum percentage of compensation contributed by employer as matching contribution	6.00%
Compensation expense for the 401(k) plan	$ 100	100	$ 100
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	18,817	16,835
Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Equity Securities [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 6,259	$ 5,428
Fair value of total plan assets by major asset category	33.00%	32.00%
Equity Securities [Member] \| Minimum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	30.00%
Equity Securities [Member] \| Maximum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	70.00%
Equity Securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 6,259	$ 5,428
Equity Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Equity Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Fixed Income [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 6,313	$ 5,852
Fair value of total plan assets by major asset category	34.00%	35.00%
Fixed Income [Member] \| Minimum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	20.00%
Fixed Income [Member] \| Maximum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	60.00%
Fixed Income [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 6,313	$ 5,852
Fixed Income [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Fixed Income [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
International Equities [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 4,165	$ 3,734
Fair value of total plan assets by major asset category	22.00%	22.00%
International Equities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 4,165	$ 3,734
International Equities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
International Equities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Real Estate [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 964	$ 795
Fair value of total plan assets by major asset category	5.00%	5.00%
Real Estate [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 964	$ 795
Real Estate [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Real Estate [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Cash and Equivalents [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 1,116	$ 1,026
Fair value of total plan assets by major asset category	6.00%	6.00%
Cash and Equivalents [Member] \| Minimum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	0.00%
Cash and Equivalents [Member] \| Maximum [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Target plan asset allocations	10.00%
Cash and Equivalents [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 1,116	$ 1,026
Cash and Equivalents [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Cash and Equivalents [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	$ 0	$ 0
Pension Plan [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Discount rate	2.93%	4.01%	3.36%
Rate of compensation increase	2.75%	2.50%	2.50%
Long-term rate of return	5.75%	6.25%	6.00%
Expected benefit payments for the plan [Abstract]
2020	$ 1,318
2021	1,325
2022	1,346
2023	1,371
2024	1,384
Years 2025-2029	$ 6,757