Note 8 - Taxes on Income (Tax Benefits) (Detail) - Effective Income Tax Rate Reconciliation (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income taxes at U.S. federal statutory tax rate	$ 11,117	$ 27,205	$ 14,967
Increase (decrease) in taxes resulting from:
State income taxes, net of federal income tax benefit	(639)	1,369	1,208
Meals and entertainment	570	531	365
Changes in taxes previously accrued	158	(155)	(621)
Foreign tax rate differences	(3,412)	(4,335)	(2,453)
Recognition of uncertain tax positions	(214)	(453)	(191)
Total tax provision	7,565	23,040	12,561
Effective tax rate	23.80%	29.60%	29.40%
Transaction Costs [Member]
Increase (decrease) in taxes resulting from:
Income Tax Reconciliation, Other Adjustments	574		586
Other Matters [Member]
Increase (decrease) in taxes resulting from:
Income Tax Reconciliation, Other Adjustments	$ (589)	$ (1,122)	$ (1,300)

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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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 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, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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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 meal and entertainment expenses under 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 year/accounting 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, that is attributable to all other items 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 current period and the expected income tax expense or benefit computed attributable to revisions of previously reported income tax expense.

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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, that is attributable to changes in other income tax contingencies, whether recorded or adjusted, during the period not otherwise listed in the existing taxonomy.

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