Note 12 - Income Taxes (Details) - Components of Income Tax Benefit (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Income Tax Benefit [Abstract]
Federal	$ 16,081us-gaap_CurrentFederalTaxExpenseBenefit	$ 5,145us-gaap_CurrentFederalTaxExpenseBenefit	$ 6,719us-gaap_CurrentFederalTaxExpenseBenefit
State	2,131	1,340	2,547
Foreign	5,769us-gaap_CurrentForeignTaxExpenseBenefit	6,180us-gaap_CurrentForeignTaxExpenseBenefit	3,949us-gaap_CurrentForeignTaxExpenseBenefit
	23,981us-gaap_CurrentIncomeTaxExpenseBenefit	12,665us-gaap_CurrentIncomeTaxExpenseBenefit	13,215us-gaap_CurrentIncomeTaxExpenseBenefit
Federal	(13,175)	(10,026)	(13,285)
State	(1,291)	(2,156)	(2,857)
Foreign	(5,080)	(5,839)	(5,059)
Total	(19,546)us-gaap_DeferredIncomeTaxExpenseBenefit	(18,021)us-gaap_DeferredIncomeTaxExpenseBenefit	(21,201)us-gaap_DeferredIncomeTaxExpenseBenefit
Expense (Benefit) for income taxes	$ 4,435us-gaap_IncomeTaxExpenseBenefit	$ (5,356)us-gaap_IncomeTaxExpenseBenefit	$ (7,987)us-gaap_IncomeTaxExpenseBenefit

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