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Note 14 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $)
In Thousands, unless otherwise specified
Dec. 27, 2014
Dec. 28, 2013
Deferred tax assets:    
Accrued expenses $ 27,088us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities $ 16,958us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Foreign tax credit carryforwards 5,299us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign 6,263us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign
R&D credit carryforwards   147us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
AMT credit carryforwards 167us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax 1,128us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Accrued restructuring 124us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther 45us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Capital losses 4,557us-gaap_DeferredTaxAssetsCapitalLossCarryforwards 6,085us-gaap_DeferredTaxAssetsCapitalLossCarryforwards
Domestic and foreign net operating loss carryforwards 525us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 890us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Gross deferred tax assets 37,760us-gaap_DeferredTaxAssetsGross 31,516us-gaap_DeferredTaxAssetsGross
Less: Valuation allowance (4,557)us-gaap_DeferredTaxAssetsValuationAllowance (6,250)us-gaap_DeferredTaxAssetsValuationAllowance
Total deferred tax assets 33,203us-gaap_DeferredTaxAssetsNet 25,266us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:    
Tax depreciation and amortization in excess of book 21,405us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 21,525us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Total deferred tax liabilities 21,405us-gaap_DeferredTaxLiabilities 21,525us-gaap_DeferredTaxLiabilities
Net deferred tax assets $ 11,798us-gaap_DeferredTaxAssetsLiabilitiesNet $ 3,741us-gaap_DeferredTaxAssetsLiabilitiesNet