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PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Cost	$ 104,129	$ 94,414
Accumulated depreciation	74,259	66,854
Depreciated cost	29,870	27,560
Depreciation expenses	7,661	8,389	$ 10,338
Changes of property and equipment	1,508	(1,221)
Computers, manufacturing, peripheral equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	100,027	90,397
Accumulated depreciation	70,956	63,656
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	2,954	2,938
Accumulated depreciation	2,502	2,435
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	1,148	1,079
Accumulated depreciation	$ 801	$ 763

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

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.

+ References

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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.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

+ References

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Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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