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PENSION PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
PENSION PLAN (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts recognized in the consolidated balance sheets [Abstract]
Noncurrent liabilities	$ (4,270)	$ (4,437)	$ (5,368)
Amounts recognized in accumulated other comprehensive loss [Abstract]
Accumulated loss	(6,428)	(6,876)	(8,467)
Deferred income taxes	2,366	2,366	2,366
Accumulated other comprehensive loss	(4,062)	(4,510)	(6,101)
Accumulated benefit obligation	21,100	23,500
COMPONENTS OF NET PERIODIC BENEFIT COST [Abstract]
Service cost	28	29	28
Interest cost	755	840	888
Expected return on plan assets	(1,104)	(1,058)	(1,118)
Recognized net actuarial loss	601	850	991
Net periodic benefit cost	280	661	789
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	$ 16,835	$ 19,055	$ 17,548	$ 17,792
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	4.01%	3.36%	3.81%
Rate of compensation increase	2.50%	2.50%	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	$ 700
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	16,835	19,055
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	$ 5,428	$ 6,856
Fair value of total plan assets by major asset category	32.00%	36.00%
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	$ 5,428	$ 6,856
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	$ 5,852	$ 6,818
Fair value of total plan assets by major asset category	35.00%	36.00%
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	$ 5,852	$ 6,818
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	$ 3,734	$ 3,490
Fair value of total plan assets by major asset category	22.00%	18.00%
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	$ 3,734	$ 3,490
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	$ 795	$ 1,133
Fair value of total plan assets by major asset category	5.00%	6.00%
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	$ 795	$ 1,133
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	$ 1,026	$ 758
Fair value of total plan assets by major asset category	6.00%	4.00%
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	$ 1,026	$ 758
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	4.01%	3.36%	3.81%
Rate of compensation increase	2.50%	2.50%	2.50%
Long-term rate of return	6.25%	6.00%	6.25%
Expected benefit payments for the plan [Abstract]
2019	$ 1,335
2020	1,347
2021	1,350
2022	1,368
2023	1,382
Years 2024-2028	$ 6,859