Property And Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Cost	$ 97,678	$ 84,581
Accumulated depreciation	64,036	54,116
Depreciated cost	33,642	30,465
Depreciation expenses	11,493	10,231	4,712
Computers, Manufacturing, Peripheral Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	90,724	78,367
Accumulated depreciation	59,536	49,995
Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	4,566	4,391
Accumulated depreciation	3,081	2,837
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	2,388	1,823
Accumulated depreciation	$ 1,419	$ 1,284

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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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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- Definition

Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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