Note 8 - Taxes on Income (Tax Benefits) (Detail) - Effective Income Tax Rate Reconciliation (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income taxes at U.S. federal statutory tax rate	$ 23,787	$ 11,117	$ 27,205
Change in the balance of the valuation allowance for deferred tax assets allocated to income tax expense	3,714	477	1
State income taxes, net of federal income tax benefit	784	(639)	1,369
Domestic Production Activities Deduction	(1,440)	(52)	(733)
Meals and entertainment	962	570	531
Changes in taxes previously accrued	(2,424)	158	(155)
Foreign tax rate differences	(4,236)	(3,412)	(4,335)
Recognition of uncertain tax positions	(800)	(214)	(453)
Total tax provision	17,473	7,565	23,040
Effective tax rate	25.70%	23.80%	29.60%
Transaction Costs [Member]
Income Tax Reconciliation, Other Adjustments	509	574
Contingent Consideration Reversal [Member]
Income Tax Reconciliation, Other Adjustments	(2,869)
Other Matters [Member]
Income Tax Reconciliation, Other Adjustments	$ (514)	$ (1,014)	$ (390)

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 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 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 the deduction for qualified production activities received 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 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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