TAXES ON INCOME (Reconciliation of Statutory Tax Rate to Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
TAXES ON INCOME [Abstract]
Loss before taxes, as reported in the consolidated statements of operations	$ (25,054)	$ (6,193)	$ 30,630
Statutory tax rate	25.00%	24.00%	25.00%
Theoretical tax expenses (income) on the above amount at the Israeli statutory tax rate	(6,264)	(1,486)	7,660
Currency differences	(713)	1,673	(394)
Tax adjustment in respect of different tax rates and "Approved Enterprise" status	(3,177)	(2,647)	(568)
Changes in valuation allowance	(3,527)	(11,156)	1,784
Taxes in respect of prior years	835	(513)	(416)
Stock compensation relating to options per ASC 718	331	292	247
Changes in valuation allowance related to Capital gains	(713)	(1,428)	(10,020)
Forfeiture of carry forward tax losses	2,551	8,281
Wavestream goodwill impairment and earn out reversal, net	8,831	5,851
Nondeductible expenses related to acquisitions			1,472
Nondeductible expenses and other differences	(16)	790	246
Taxes on income (tax benefit)	$ (1,862)	$ (343)	$ 11

Income Tax Reconciliation Carry Forward Tax Losses Forfeited

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Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance Capital Gains

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Income Tax Reconciliation Foreign Income Exchange Rate Differential

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Income Tax Reconciliation Foreign Income Tax Rate Differential Tax Exempt Income

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Income Tax Reconciliation Nondeductible Expense Acquisition Costs

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Income Tax Reconciliation Nondeductible Expense Impairment Losses And Earn Out Reversal

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to nondeductible expenses under enacted tax laws, or differences in the methodologies used to determine expense amounts for financial statements prepared in accordance with generally accepted accounting principles, not otherwise listed in the existing taxonomy.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to differences in the deductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the current period and the expected income tax expense or benefit computed attributable to revisions of previously reported income tax expense.

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