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Note 13 - Income Taxes (Details) - Components of Deferred Tax Assets and Liabilities (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Goodwill and intangible assets $ 23,624us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets $ 74,992us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Accrued expenses 18,191us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities 24,263us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Deferred revenue 7,945us-gaap_DeferredTaxAssetsDeferredIncome 4,413us-gaap_DeferredTaxAssetsDeferredIncome
Inventories 6,306us-gaap_DeferredTaxAssetsInventory 4,483us-gaap_DeferredTaxAssetsInventory
Pension obligations 8,738us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions 4,043us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions
Stock-based compensation 8,628us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 6,609us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Operating loss and credit carryforwards 10,047us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 976us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Other 4,299us-gaap_DeferredTaxAssetsOther 2,089us-gaap_DeferredTaxAssetsOther
Valuation allowance (1,385)us-gaap_DeferredTaxAssetsValuationAllowance (1,021)us-gaap_DeferredTaxAssetsValuationAllowance
Total deferred tax assets 86,393us-gaap_DeferredTaxAssetsNet 120,847us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:    
Depreciation 18,535us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 15,163us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Debt refinancing costs 10,925us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts 7,494us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
Prepaid expenses 1,032us-gaap_DeferredTaxLiabilitiesPrepaidExpenses 1,183us-gaap_DeferredTaxLiabilitiesPrepaidExpenses
Total deferred tax liabilities 30,492us-gaap_DeferredIncomeTaxLiabilities 23,840us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax assets $ 55,901us-gaap_DeferredTaxAssetsLiabilitiesNet $ 97,007us-gaap_DeferredTaxAssetsLiabilitiesNet