PROPERTY, EQUIPMENT AND FACILITIES (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Property, equipment and facilities net [Abstract]
Property, equipment and facilities, Gross	$ 224,688	$ 221,753
Less accumulated depreciation and amortization	(176,300)	(172,408)
Property, equipment and facilities, Net	48,388	49,345
Depreciation and amortization expense	7,400	8,100
Land [Member]
Property, equipment and facilities net [Abstract]
Property, equipment and facilities, Gross	6,969	6,969
Buildings and Improvements [Member]
Property, equipment and facilities net [Abstract]
Property, equipment and facilities, Gross	$ 134,526	131,739
Buildings and Improvements [Member] \| Minimum [Member]
Property, equipment and facilities net [Abstract]
Useful life	1 year
Buildings and Improvements [Member] \| Maximum [Member]
Property, equipment and facilities net [Abstract]
Useful life	25 years
Equipment, Furniture and Fixtures [Member]
Property, equipment and facilities net [Abstract]
Property, equipment and facilities, Gross	$ 82,133	81,900
Equipment, Furniture and Fixtures [Member] \| Minimum [Member]
Property, equipment and facilities net [Abstract]
Useful life	1 year
Equipment, Furniture and Fixtures [Member] \| Maximum [Member]
Property, equipment and facilities net [Abstract]
Useful life	7 years
Vehicles [Member]
Property, equipment and facilities net [Abstract]
Useful life	3 years
Property, equipment and facilities, Gross	$ 733	825
Construction in Progress [Member]
Property, equipment and facilities net [Abstract]
Property, equipment and facilities, Gross	$ 327	$ 320

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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